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Mesostruma exolympica
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Lepeletier de Saint-Fargeau, 1835
148 genera
7,803 species
40 fossil genera
196 fossil species
Evolutionary Placement



Amblyoponinae - see relationships



Ponerinae - see relationships



Dorylinae - see relationships


Dolichoderinae - see relationships

Myrmeciinae - see relationships within Myrmecia

Pseudomyrmecinae - see relationships

Formicinae - see relationships

Ectatomminae - see relationships

Myrmicinae - see relationships

See Phylogeny of Formicidae for details.

This is the largest subfamily in Australia, based on both the number of genera and the number of species. Myrmicines range greatly in size, with the smallest about 1 mm long and the largest up to 10 mm. While many species are generalist predators, some specialise on selected soft-bodied invertebrates such as Collembola and others are important seed harvesters. Workers can be found foraging at all times of the day and night, sometimes in large numbers. Nests can be found in almost any suitable location from deep in the soil to the upper branches of trees. Colonies are generally small with a few hundred to a few thousand workers, although some species can have huge nests with many thousands of workers while others form very small nests with fewer than 50 individuals.

Morphologically, these ants are very diverse. Many groups are highly modified with unusual mandibles, elongate spines, elaborate hairs or unique structures not seen in any other ants. Because of this, many genera are relatively easy to identify as they have highly distinctive features which are easily seen (given the appropriate magnification). At the same time, some genera are much less specialised or modified, and separating these from close relatives can be difficult. In these cases, close inspection of subtle differences may be required.

Myrmicines occur throughout the world in all major habitats (except arctic and antarctic regions). They are the largest subfamily of ants with over 6700 species and subspecies and 155 genera. Australia has over 350 species placed in 38 genera. Eight of the genera are restricted to Australia.


The mesosoma is attached to the gaster by two distinct segments, the petiole and postpetiole. The mandibles are generally triangular, but if they are elongate then there are no teeth along the inner margin and they are attached near the middle of the front margin of the head. The eyes are almost always present, conspicuous and with many facets but are absent in a few species. The frontal lobes are always present and expanded towards the sides so they cover the inner part of the antennal bases where they are inserted into the head when viewed from the front. The pronotum and mesonotum are fused into a single plate.

Species of myrmicines are most likely to be confused with species of Leptanilla or Tetraponera because of the two segmented petiole. However, both Leptanilla and Tetraponera have the pronotum and mesonotum unfused and with a flexible joint between them, while in all myrmicines these two plates are fused into a single structure.

Boudinot (2015) - Male Myrmicinae are uniquely identified by the strongly petiolated third abdominal segment (postpetiole), axial helcium, 1,1 maximum ventroapical tibial spur count, unvaulted abdominal tergum IV, and presence of propodeal lobes. All myrmicines lack jugal lobes and have posteriorly-situated antennal toruli, but are highly variable otherwise: mandibles fully-developed to nub-like; antenna 8–13-merous; forewing with (0)1–8 eight closed cells; and petiole sessile to long-pedunculate. Some myrmicines, e.g., Adelomyrmex and Acanthognathus, have extremely reduced wing venation similar to Leptanillinae; all myrmicine taxa examined during this study with reduced wing venation have conspicuous propodeal lobes, differentiating them easily from Leptanillinae despite secondary petiolation of abdominal segment III in some leptanillines.

AntWeb icon 02.png See images of genera within this subfamily

Keys including this Subfamily

Keys to Genus in this Subfamily


Distribution and Species Richness based on AntMaps


Extant Taxa

Tribes Valid Genera % World Genera Invalid Genera Valid Species/Subsp. % World Species Invalid Species/Subsp.
6 148 28.7% 264 7,803 51.73% 2,477

Fossil Taxa

Fossil Genera % World Fossil Genera Valid Fossil Species/Subsp. % World Fossil Species/Subsp.
40 23.8% 196 22.22%

Fossils known from: Aix-en-Provence, France (Late Oligocene), Arkansas amber, Malvern, Arkansas, United States (Lutetian, Middle Eocene), Baltic amber (Bartonian, Middle to Late Eocene), Bembridge Marls, Isle of Wight, UK (Priabonian, Late Eocene), Bitterfeld amber (Bartonian, Middle to Late Eocene), Bolshaya Svetlovodnaya, Sikhote-Alin, Russia (Priabonian, Late Eocene), Borneo amber (Miocene), Brunn-Vösendorf, Austria (Late Miocene), Brunstatt, Haut-Rhin, France (Early Oligocene), Danish-Scandinavian amber (Bartonian, Middle to Late Eocene), Dominican amber, Dominican Republic (Burdigalian, Early Miocene), Epecuen Formation, Salinas de Hidalgo, La Pampa Prov., Argentina (Huayquerian, Late Miocene), Ethiopian amber (Early Miocene), Florissant, Colorado, United States (Late Eocene), Fushun amber, Liaoning, China (Ypresian, Early Eocene), Green River Formation, Colorado, United States (Lutetian, Middle Eocene), Chôjaburu, Iki Island, Japan (Middle Miocene), Khronya Cape, Kerch, Crimea, Russian Federation (Sarmatian, Upper Miocene), Kishenehn Formation shale, Montana, United States (Lutetian, Middle Eocene), Kleinkems, Germany (Early Oligocene), Mexican amber, Chiapas, Mexico (Middle Miocene), Mokrina (Krottensee), Czech Republic (Late Burdigalian, Early Miocene), Oeningen, Switzerland (Messinian, Late Miocene), Orapa kimberlitic deposits, Botswana (Turonian, Late Cretaceous), Parschlug, Austria (Serravallian, Miocene), Quesnel, British Columbia, Canada (Early Miocene?), Radoboj, Croatia (Burdigalian, Early Miocene), Rott, Westphalia, Germany (Late Oligocene), Rovno amber (Priabonian, Late Eocene), Sakhalin amber, Ukraine (Thanetian, Paleocene), Schossnitz (= Sosnica?), Silesia, Poland (Late Miocene), Shanwang, China (Early Miocene), Sicilian amber, Italy (Late/Upper Miocene), Vishnevaya Balka Creek, Stavropol, Russian Federation (Middle Miocene).

List of Tribes and Genera



Extant Genera


Fossil Genera



Boudinot (2015) - Of all the ant subfamilies, the Myrmicinae will be the grand challenge to understand with respect to males. At the time of writing, 139 valid genera and 6,500 valid species are described. Males of at least 30 genera are unknown, but as generic delimitation is still very active in the Myrmicinae some uncertainty exists for this number. Based on a study of the New World genera (B. Boudinot, in prep.), distinctions between genera may be weak and in many cases genera will have to be keyed multiple times due to variability. The recent subfamily-wide phylogeny of Ward et al. (2015) will contribute significantly to improving the classification of the Myrmicinae.


Flight Period

Explore Flight Data: All, Drilldown
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Flight Months for Genera within this Subfamily:

Taxon Month
Acromyrmex Jul Aug
Aphaenogaster Jun
Atta Jun Jul
Cardiocondyla Jun
Carebara Apr
Crematogaster Apr
Cyphomyrmex Feb Mar Apr Sep Dec
Dolopomyrmex Mar
Formicoxenus Jul Aug
Harpagoxenus Jul Aug
Leptothorax Jul Aug
Manica Aug
Megalomyrmex May Jun Jul Aug
Meranoplus Jan Feb Apr May Jun Aug Sep Oct Nov Dec
Messor Jan Nov Dec
Monomorium Jun
Myrmecina Aug Sep
Myrmica Aug
Myrmicaria Jan
Myrmicocrypta Jan Feb Mar Apr May Jun Dec
Novomessor Jul
Pheidole May
Pogonomyrmex Jul
Proatta Apr
Procryptocerus May Jun Jul Aug Sep Nov Dec
Solenopsis Jul
Stenamma Sep
Strongylognathus Jul Aug Sep
Strumigenys Mar Apr May Jun Jul Aug Sep Oct Nov
Temnothorax Aug
Tetramorium Jun
Trachymyrmex May Jun Jul Aug
Veromessor Jun Jul
Wasmannia Apr May Jun Jul Aug Sep Oct Nov
Xenomyrmex Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec


Karyotype Data

Explore Karyotype Data: All, Drilldown
Click here to show/hide karyotype count data.

Known Haploid Counts: 4, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 28, 30.

Haploid Count Details: 10 (Taxon: Pheidole), 10 (Taxon: Pheidole), 10 (Taxon: Temnothorax algerianus), 10 (Taxon: Trachymyrmex septentrionalis), 10 (Taxon: Temnothorax andrei), 10 (Taxon: Pheidole dentigula), 10 (Taxon: Mycetomoellerius holmgreni), 10 (Taxon: Mycetomoellerius iheringi), 10 (Taxon: Mycetomoellerius relictus), 10 (Taxon: Temnothorax bernardi), 10 (Taxon: Epopostruma), 10 (Taxon: Temnothorax adlerzi), 10 (Taxon: Pheidole pallidula), 10 (Taxon: Pheidole pallidula), 10 (Taxon: Temnothorax corsicus), 10 (Taxon: Temnothorax gordiagini), 10 (Taxon: Temnothorax kraussei), 10 (Taxon: Temnothorax ravouxi), 10 (Taxon: Temnothorax stumperi), 10 (Taxon: Tetramorium brevidentatum), 10 (Taxon: Meranoplus), 10 (Taxon: Pheidole), 10 (Taxon: Pheidole fervida), 10 (Taxon: Pheidole), 10 (Taxon: Pheidole), 10 (Taxon: Pheidole fallax), 11 (Taxon: Leptothorax gredleri), 11 (Taxon: Vollenhovia), 11 (Taxon: Aphaenogaster subterranea), 11 (Taxon: Amoimyrmex striatus), 11 (Taxon: Solenopsis molesta), 11 (Taxon: Solenopsis), 11 (Taxon: Atta colombica), 11 (Taxon: Orectognathus darlingtoni), 11 (Taxon: Solenopsis fugax), 11 (Taxon: Temnothorax americanus), 11 (Taxon: Temnothorax flavicornis), 11 (Taxon: Temnothorax rottenbergii), 11 (Taxon: Temnothorax sordidulus), 11 (Taxon: Acanthomyrmex), 11 (Taxon: Acanthomyrmex), 11 (Taxon: Temnothorax nylanderi), 11 (Taxon: Temnothorax nylanderi), 11 (Taxon: Colobostruma alinodis), 11 (Taxon: Formicoxenus provancheri), 11 (Taxon: Lordomyrma), 11 (Taxon: Aphaenogaster smythiesii), 11 (Taxon: Monomorium), 11 (Taxon: Monomorium), 11 (Taxon: Monomorium), 11 (Taxon: Temnothorax exilis), 11 (Taxon: Orectognathus versicolor), 11 (Taxon: Monomorium pharaonis), 11 16 17 (Taxon: Aphaenogaster gibbosa), 12 (Taxon: Temnothorax longispinosus), 12 (Taxon: Temnothorax longispinosus), 12 (Taxon: Temnothorax), 12 (Taxon: Pristomyrmex punctatus), 12 (Taxon: Cyphomyrmex transversus), 12 (Taxon: Crematogaster), 12 (Taxon: Temnothorax spinosior), 12 (Taxon: Temnothorax kutteri), 12 (Taxon: Temnothorax corticalis), 12 (Taxon: Temnothorax interruptus), 12 (Taxon: Temnothorax muellerianus), 12 (Taxon: Temnothorax recedens), 12 (Taxon: Leptothorax), 12 (Taxon: Leptothorax), 12 (Taxon: Strumigenys dohertyi), 13 (Taxon: Strumigenys), 13 (Taxon: Leptothorax acervorum), 13 (Taxon: Leptothorax sphagnicola), 13 (Taxon: Mycetophylax morschi), 13 (Taxon: Temnothorax melas), 13 (Taxon: Leptothorax), 13 (Taxon: Tetramorium spinosum), 14 (Taxon: Temnothorax rugatulus), 14 (Taxon: Pristomyrmex), 14 (Taxon: Temnothorax), 14 (Taxon: Strongylognathus huberi), 14 (Taxon: Myrmecina graminicola), 14 (Taxon: Myrmicocrypta), 14 (Taxon: Tetramorium caespitum), 14 (Taxon: Tetramorium caespitum), 14 (Taxon: Tetramorium caespitum), 14 (Taxon: Myrmecina americana), 14 (Taxon: Temnothorax mediterraneus), 14 (Taxon: Temnothorax lichtensteini), 14 (Taxon: Temnothorax parvulus), 14 (Taxon: Tetramorium semilaeve), 14 (Taxon: Leptothorax), 14 (Taxon: Tetramorium forte), 15 (Taxon: Mycetophylax conformis), 15 (Taxon: Leptothorax faberi), 15 (Taxon: Mycetophylax morschi), 15 (Taxon: Leptothorax), 15 (Taxon: Formicoxenus nitidulus), 16 (Taxon: Pheidole), 16 (Taxon: Solenopsis geminata), 16 (Taxon: Solenopsis geminata), 16 (Taxon: Solenopsis invicta), 16 (Taxon: Solenopsis richteri), 16 (Taxon: Pogonomyrmex subnitidus), 16 (Taxon: Aphaenogaster osimenseis), 16 (Taxon: Solenopsis xyloni), 16 (Taxon: Leptothorax faberi), 16 (Taxon: Pogonomyrmex barbatus), 16 (Taxon: Aphaenogaster senilis), 16 (Taxon: Solenopsis saevissima), 16 (Taxon: Carebara), 16 (Taxon: Pogonomyrmex maricopa), 16 (Taxon: Pogonomyrmex comanche), 16 (Taxon: Leptothorax canadensis), 16 (Taxon: Leptothorax), 16 (Taxon: Temnothorax spinosus), 16 (Taxon: Solenopsis aurea), 16 (Taxon: Leptothorax), 17 (Taxon: Pheidole), 17 (Taxon: Pheidole nodus), 17 (Taxon: Pheidole fervens), 17 (Taxon: Leptothorax retractus), 17 (Taxon: Leptothorax muscorum), 17 (Taxon: Aphaenogaster iberica), 17 (Taxon: Temnothorax gredosi), 17 (Taxon: Leptothorax crassipilis), 17 (Taxon: Leptothorax canadensis), 17 (Taxon: Aphaenogaster testaceopilosa), 17 (Taxon: Leptothorax), 17 (Taxon: Leptothorax), 17 (Taxon: Aphaenogaster famelica), 17 (Taxon: Temnothorax exilis), 18 (Taxon: Pheidole), 18 (Taxon: Pheidole nodus), 18 (Taxon: Pheidole fervens), 18 (Taxon: Vollenhovia emeryi), 18 (Taxon: Harpagoxenus canadensis), 18 (Taxon: Mycetophylax simplex), 18 (Taxon: Leptothorax pocahontas), 18 (Taxon: Leptothorax retractus), 18 (Taxon: Leptothorax muscorum), 18 (Taxon: Crematogaster subnuda), 18 (Taxon: Carebara sauteri), 18 (Taxon: Leptothorax crassipilis), 18 (Taxon: Leptothorax canadensis), 18 (Taxon: Temnothorax niger), 18 20 (Taxon: Aphaenogaster rudis), 19 (Taxon: Pheidole nodus), 19 (Taxon: Pheidole fervens), 19 (Taxon: Pheidole fervens), 19 (Taxon: Acromyrmex coronatus), 20 (Taxon: Stenamma westwoodii), 20 (Taxon: Pheidole nodus), 20 (Taxon: Pheidole fervens), 20 (Taxon: Harpagoxenus sublaevis), 21 (Taxon: Messor barbarus), 21 (Taxon: Cyphomyrmex transversus), 21 (Taxon: Temnothorax luteus), 21 (Taxon: Temnothorax racovitzai), 21 (Taxon: Leptothorax), 22 (Taxon: Messor aciculatus), 22 (Taxon: Temnothorax ambiguus), 22 (Taxon: Myrmica scabrinodis), 22 (Taxon: Leptothorax muscorum), 22 (Taxon: Leptothorax canadensis), 22 (Taxon: Leptothorax), 22 (Taxon: Cephalotes pusillus), 23 (Taxon: Temnothorax curvispinosus), 23 (Taxon: Temnothorax duloticus), 23 (Taxon: Apterostigma madidiense), 23 (Taxon: Myrmica sabuleti), 23 (Taxon: Myrmica rubra), 23 (Taxon: Myrmicaria), 23 (Taxon: Temnothorax angustulus), 23 (Taxon: Leptothorax canadensis), 23 (Taxon: Myrmica schencki), 23 24 25 (Taxon: Leptothorax kutteri), 24 (Taxon: Myrmica lobicornis), 24 (Taxon: Temnothorax duloticus), 24 (Taxon: Myrmica ruginodis), 24 (Taxon: Myrmica sulcinodis), 25 (Taxon: Sericomyrmex parvulus), 25 (Taxon: Temnothorax duloticus), 25 (Taxon: Sericomyrmex), 25 (Taxon: Megalomyrmex incisus), 26 (Taxon: Leptothorax pacis), 28 (Taxon: Leptothorax goesswaldi), 28 (Taxon: Myrmica sulcinodis), 30 (Taxon: Pogonomyrmex imberbiculus), 4 (Taxon: Mycocepurus goeldii), 4 (Taxon: Stenamma brevicorne), 8 (Taxon: Temnothorax albipennis), 8 (Taxon: Temnothorax albipennis), 8 (Taxon: Temnothorax rougeti), 9 (Taxon: Pheidole), 9 (Taxon: Pheidole), 9 (Taxon: Temnothorax), 9 (Taxon: Temnothorax schaumii), 9 (Taxon: Mycetomoellerius urichii), 9 (Taxon: Temnothorax tuberum), 9 (Taxon: Temnothorax tuberum), 9 (Taxon: Temnothorax unifasciatus), 9 (Taxon: Temnothorax unifasciatus), 9 (Taxon: Mycetomoellerius), 9 (Taxon: Temnothorax affinis), 9 (Taxon: Temnothorax corticalis), 9 (Taxon: Temnothorax nigriceps), 9 (Taxon: Temnothorax aveli), 9 (Taxon: Temnothorax congruus), 9 (Taxon: Pheidole).

Known Diploid Counts: 4, 8, 12, 14, 16, 18, 20, 21, 22, 24, 26, 27, 28, 30, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 56, 58, 60, 61, 62, 66, 70.

Diploid Count Details: 12 (Taxon: Pheidole mus), 14 (Taxon: Tetramorium simillimum), 14 (Taxon: Tetramorium walshi), 14 (Taxon: Tetramorium), 14 (Taxon: Tetramorium lanuginosum), 14 (Taxon: Mycetarotes carinatus), 14 (Taxon: Tetramorium kheperra), 16 (Taxon: Pheidole), 16 (Taxon: Meranoplus bicolor), 16 (Taxon: Strumigenys), 16 (Taxon: Monomorium sahlbergi), 16 (Taxon: Dacetinops concinnus), 18 (Taxon: Pheidole), 18 (Taxon: Pheidole), 18 (Taxon: Pheidole), 18 (Taxon: Pheidole), 18 (Taxon: Tetramorium), 18 (Taxon: Tetramorium), 18 (Taxon: Tetramorium), 18 (Taxon: Mycetomoellerius urichii), 18 (Taxon: Temnothorax tuberum), 18 (Taxon: Temnothorax unifasciatus), 18 (Taxon: Mycetomoellerius), 18 (Taxon: Mayriella abstinens), 18 (Taxon: Temnothorax nigriceps), 18 (Taxon: Pheidole woodmasoni), 18 (Taxon: Eurhopalothrix), 18 (Taxon: Pheidole soritis), 18 (Taxon: Temnothorax congruus), 18 (Taxon: Pheidole), 18 (Taxon: Pheidole tepicana), 18 (Taxon: Pheidole), 18 (Taxon: Pheidole), 20 (Taxon: Pheidole megacephala), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole dentata), 20 (Taxon: Trachymyrmex septentrionalis), 20 (Taxon: Tetramorium), 20 (Taxon: Tetramorium), 20 (Taxon: Tetramorium), 20 (Taxon: Tetramorium), 20 (Taxon: Pheidole indica), 20 (Taxon: Monomorium orientale), 20 (Taxon: Pheidole binghamii), 20 (Taxon: Pheidole plagiaria), 20 (Taxon: Pheidole dentigula), 20 (Taxon: Mycetomoellerius holmgreni), 20 (Taxon: Mycetomoellerius iheringi), 20 (Taxon: Cyphomyrmex costatus), 20 (Taxon: Mycetomoellerius relictus), 20 (Taxon: Epopostruma), 20 (Taxon: Pheidole pallidula), 20 (Taxon: Pheidole pallidula), 20 (Taxon: Pheidole desertorum), 20 (Taxon: Pheidole spininodis), 20 (Taxon: Pheidole strobeli), 20 (Taxon: Pheidole capellinii), 20 (Taxon: Pheidole hyatti), 20 (Taxon: Basiceros convexiceps), 20 (Taxon: Tetramorium brevidentatum), 20 (Taxon: Pheidole subarmata), 20 (Taxon: Tetramorium pnyxis), 20 (Taxon: Tetramorium seneb), 20 (Taxon: Pheidole hortensis), 20 (Taxon: Pheidole porcula), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole fervida), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole), 20 (Taxon: Pheidole fallax), 20 24 32 (Taxon: Apterostigma), 21 (Taxon: Pheidole), 21 (Taxon: Monomorium indicum), 22 (Taxon: Pheidole), 22 (Taxon: Atta sexdens), 22 (Taxon: Atta sexdens), 22 (Taxon: Atta sexdens), 22 (Taxon: Atta robusta), 22 (Taxon: Tetramorium insolens), 22 (Taxon: Pristomyrmex), 22 (Taxon: Monomorium rothsteini), 22 (Taxon: Tetramorium), 22 (Taxon: Aphaenogaster subterranea), 22 (Taxon: Amoimyrmex bruchi), 22 (Taxon: Amoimyrmex silvestrii), 22 (Taxon: Amoimyrmex striatus), 22 (Taxon: Solenopsis molesta), 22 (Taxon: Tetramorium adelphon), 22 (Taxon: Tetramorium pacificum), 22 (Taxon: Monomorium viridum), 22 (Taxon: Atta colombica), 22 (Taxon: Cyphomyrmex cornutus), 22 (Taxon: Atta bisphaerica), 22 (Taxon: Aphaenogaster japonica), 22 (Taxon: Mycetomoellerius), 22 (Taxon: Apterostigma steigeri), 22 (Taxon: Monomorium indicum), 22 (Taxon: Orectognathus darlingtoni), 22 (Taxon: Solenopsis fugax), 22 (Taxon: Meranoplus minor), 22 (Taxon: Solenopsis fugax), 22 (Taxon: Chelaner), 22 (Taxon: Monomorium minimum), 22 (Taxon: Pheidole germaini), 22 (Taxon: Colobostruma), 22 (Taxon: Acanthomyrmex), 22 (Taxon: Acanthomyrmex), 22 (Taxon: Temnothorax nylanderi), 22 (Taxon: Strumigenys doriae), 22 (Taxon: Colobostruma alinodis), 22 (Taxon: Atta laevigata), 22 (Taxon: Formicoxenus provancheri), 22 (Taxon: Tetramorium guineense), 22 (Taxon: Lordomyrma), 22 (Taxon: Meranoplus), 22 (Taxon: Meranoplus), 22 (Taxon: Monomorium), 22 (Taxon: Monomorium), 22 (Taxon: Monomorium), 22 (Taxon: Monomorium), 22 (Taxon: Monomorium), 22 (Taxon: Orectognathus versicolor), 22 (Taxon: Monomorium pharaonis), 22 34 (Taxon: Aphaenogaster smythiesii), 24 (Taxon: Recurvidris), 24 (Taxon: Temnothorax longispinosus), 24 (Taxon: Tetramorium), 24 (Taxon: Apterostigma mayri), 24 (Taxon: Pristomyrmex punctatus), 24 (Taxon: Cyphomyrmex transversus), 24 (Taxon: Crematogaster), 24 (Taxon: Crematogaster), 24 (Taxon: Strumigenys friedae), 24 (Taxon: Crematogaster), 24 (Taxon: Crematogaster longispina), 24 (Taxon: Apterostigma madidiense), 24 (Taxon: Temnothorax spinosior), 24 (Taxon: Pheidole pallidula), 24 (Taxon: Temnothorax interruptus), 24 (Taxon: Acanthomyrmex), 24 (Taxon: Chelaner whitei), 24 (Taxon: Crematogaster biroi), 24 (Taxon: Strumigenys dohertyi), 26 (Taxon: Temnothorax rugatulus), 26 (Taxon: Tetramorium smithi), 26 (Taxon: Tetramorium smithi), 26 (Taxon: Tetramorium smithi), 26 (Taxon: Tetramorium), 26 (Taxon: Crematogaster nawai), 26 (Taxon: Crematogaster), 26 (Taxon: Crematogaster), 26 (Taxon: Crematogaster), 26 (Taxon: Crematogaster), 26 (Taxon: Leptothorax acervorum), 26 (Taxon: Mycetophylax morschi), 26 (Taxon: Mycetophylax morschi), 26 (Taxon: Carebara), 26 (Taxon: Tetramorium spinosum), 27 (Taxon: Temnothorax rugatulus), 27 (Taxon: Cardiocondyla minutior), 28 (Taxon: Pheidole), 28 (Taxon: Allomerus decemarticulatus), 28 (Taxon: Strongylognathus huberi), 28 (Taxon: Formicoxenus chamberlini), 28 (Taxon: Formicoxenus quebecensis), 28 (Taxon: Tetramorium eleates), 28 (Taxon: Myrmicocrypta), 28 (Taxon: Tetramorium caespitum), 28 (Taxon: Tetramorium caespitum), 28 (Taxon: Temnothorax mediterraneus), 28 (Taxon: Mycetophylax morschi), 28 (Taxon: Mycetophylax morschi), 28 (Taxon: Cardiocondyla nuda), 30 (Taxon: Pheidole), 30 (Taxon: Aphaenogaster), 30 (Taxon: Myrmicocrypta), 30 (Taxon: Myrmicocrypta), 30 (Taxon: Mycetophylax conformis), 30 (Taxon: Mycetophylax conformis), 30 (Taxon: Orectognathus clarki), 30 (Taxon: Mycetophylax morschi), 30 (Taxon: Mycetophylax morschi), 30 (Taxon: Cardiocondyla minutior), 30 46 (Taxon: Aphaenogaster beccarii), 32 (Taxon: Pheidole), 32 (Taxon: Pogonomyrmex badius), 32 (Taxon: Solenopsis geminata), 32 (Taxon: Proatta butteli), 32 (Taxon: Solenopsis geminata), 32 (Taxon: Solenopsis geminata), 32 (Taxon: Solenopsis invicta), 32 (Taxon: Solenopsis richteri), 32 (Taxon: Wasmannia auropunctata), 32 (Taxon: Wasmannia auropunctata), 32 (Taxon: Pogonomyrmex montanus), 32 (Taxon: Pogonomyrmex subnitidus), 32 (Taxon: Aphaenogaster osimenseis), 32 (Taxon: Solenopsis xyloni), 32 (Taxon: Chelaner), 32 (Taxon: Pogonomyrmex barbatus), 32 (Taxon: Aphaenogaster senilis), 32 (Taxon: Pogonomyrmex magnacanthus), 32 (Taxon: Solenopsis saevissima), 32 (Taxon: Carebara), 32 (Taxon: Pogonomyrmex maricopa), 32 (Taxon: Pogonomyrmex rugosus), 32 (Taxon: Cyphomyrmex rimosus), 32 (Taxon: Pogonomyrmex apache), 32 (Taxon: Pogonomyrmex brevispinosus), 32 (Taxon: Pogonomyrmex comanche), 32 (Taxon: Pogonomyrmex occidentalis), 32 (Taxon: Pogonomyrmex desertorum), 32 (Taxon: Pogonomyrmex californicus), 32 (Taxon: Solenopsis aurea), 33 (Taxon: Vollenhovia), 34 (Taxon: Vollenhovia), 34 (Taxon: Aphaenogaster depilis), 34 (Taxon: Monomorium subopacum), 34 (Taxon: Aphaenogaster tipuna), 34 (Taxon: Leptothorax muscorum), 34 (Taxon: Aphaenogaster iberica), 34 (Taxon: Carebara), 34 (Taxon: Leptothorax canadensis), 34 (Taxon: Aphaenogaster testaceopilosa), 34 (Taxon: Aphaenogaster famelica), 34 (Taxon: Aphaenogaster gibbosa), 34 (Taxon: Aphaenogaster sardoa), 34 (Taxon: Monomorium), 35 (Taxon: Tetramorium), 36 (Taxon: Pheidole), 36 (Taxon: Strumigenys mutica), 36 (Taxon: Vollenhovia), 36 (Taxon: Acromyrmex ameliae), 36 (Taxon: Tetramorium), 36 (Taxon: Vollenhovia emeryi), 36 (Taxon: Crematogaster brunnea), 36 (Taxon: Aphaenogaster fulva), 36 (Taxon: Crematogaster), 36 (Taxon: Aphaenogaster miamiana), 36 (Taxon: Mycetophylax simplex), 36 (Taxon: Mycetophylax simplex), 36 (Taxon: Leptothorax muscorum), 36 (Taxon: Carebara), 36 (Taxon: Carebara), 36 (Taxon: Crematogaster subnuda), 36 (Taxon: Leptothorax canadensis), 36 (Taxon: Pogonomyrmex huachucanus), 37 (Taxon: Pheidole nodus), 38 (Taxon: Acromyrmex crassispinus), 38 (Taxon: Acromyrmex crassispinus), 38 (Taxon: Acromyrmex heyeri), 38 (Taxon: Acromyrmex echinatior), 38 (Taxon: Acromyrmex hispidus), 38 (Taxon: Pheidole), 38 (Taxon: Acromyrmex nigrosetosus), 38 (Taxon: Acromyrmex rugosus), 38 (Taxon: Acromyrmex subterraneus), 38 (Taxon: Acromyrmex subterraneus), 38 (Taxon: Pheidole), 38 (Taxon: Acromyrmex molestans), 38 (Taxon: Pheidole nodus), 38 (Taxon: Aphaenogaster lamellidens), 38 (Taxon: Acromyrmex aspersus), 38 (Taxon: Solenopsis), 38 (Taxon: Pheidole fervens), 38 (Taxon: Strumigenys), 38 (Taxon: Acromyrmex lundii), 38 (Taxon: Trichomyrmex glaber), 38 (Taxon: Trichomyrmex scabriceps), 38 (Taxon: Carebara), 38 (Taxon: Acromyrmex balzani), 38 (Taxon: Acromyrmex balzani), 38 (Taxon: Acromyrmex coronatus), 38 (Taxon: Acromyrmex disciger), 38 (Taxon: Acromyrmex niger), 38 (Taxon: Lophomyrmex), 38 (Taxon: Lophomyrmex bedoti), 38 (Taxon: Acromyrmex ambiguus), 38 (Taxon: Acromyrmex ambiguus), 39 (Taxon: Pheidole nodus), 4 (Taxon: Strumigenys louisianae), 40 (Taxon: Vollenhovia), 40 (Taxon: Cardiocondyla), 40 (Taxon: Strumigenys godeffroyi), 40 (Taxon: Crematogaster), 40 (Taxon: Strumigenys diabola), 40 (Taxon: Harpagoxenus sublaevis), 40 (Taxon: Veromessor andrei), 40 41 42 44 (Taxon: Aphaenogaster rudis), 41 (Taxon: Messor), 42 (Taxon: Carebara diversa), 42 (Taxon: Aphaenogaster treatae), 42 (Taxon: Cyphomyrmex transversus), 42 (Taxon: Pheidole latinoda), 42 (Taxon: Carebara), 42 (Taxon: Carebara), 42 (Taxon: Monomorium), 42 (Taxon: Pheidole), 44 (Taxon: Messor aciculatus), 44 (Taxon: Carebara asina), 44 (Taxon: Strumigenys godeffroyi), 44 (Taxon: Allomerus octoarticulatus), 44 (Taxon: Myrmica scabrinodis), 44 (Taxon: Leptothorax muscorum), 44 (Taxon: Myrmicaria brunnea), 44 (Taxon: Manica rubida), 44 (Taxon: Myrmicaria), 44 (Taxon: Myrmicaria), 44 (Taxon: Myrmicaria), 44 (Taxon: Carebara), 44 (Taxon: Carebara), 44 (Taxon: Leptothorax canadensis), 44 (Taxon: Cephalotes pusillus), 45 46 (Taxon: Aphaenogaster longiceps), 46 (Taxon: Myrmica sabuleti), 46 (Taxon: Myrmica rubra), 46 (Taxon: Myrmicaria), 46 (Taxon: Myrmica schencki), 48 (Taxon: Myrmica ruginodis), 48 (Taxon: Myrmica rubra), 49 (Taxon: Vollenhovia), 49 (Taxon: Podomyrma adelaidae), 50 (Taxon: Vollenhovia), 50 (Taxon: Sericomyrmex parvulus), 50 (Taxon: Podomyrma adelaidae), 50 (Taxon: Sericomyrmex amabilis), 50 (Taxon: Sericomyrmex), 50 (Taxon: Crematogaster rothneyi), 50 (Taxon: Megalomyrmex incisus), 51 (Taxon: Podomyrma adelaidae), 52 (Taxon: Cardiocondyla wroughtonii), 54 (Taxon: Mycetarotes parallelus), 56 (Taxon: Crematogaster), 56 (Taxon: Myrmica sulcinodis), 58 (Taxon: Pogonomyrmex imberbiculus), 60 (Taxon: Pogonomyrmex imberbiculus), 61 (Taxon: Pogonomyrmex imberbiculus), 62 (Taxon: Pogonomyrmex imberbiculus), 66 (Taxon: Myrmecina), 70 (Taxon: Erromyrma latinodis), 8 (Taxon: Mycocepurus goeldii), 8 (Taxon: Mycocepurus goeldii), 8 (Taxon: Stenamma brevicorne), 8 (Taxon: Mycocepurus).


The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • MYRMICINAE [subfamily of Formicidae]
    • Myrmicites Lepeletier de Saint-Fargeau, 1835: 169. Type-genus: Myrmica Latreille, 1804: 179.

Taxonomic History

  • Myrmicinae as group name: Lepeletier de Saint-Fargeau, 1835: 169 [Myrmicites]; Nylander, 1846a: 877 [Myrmicae].
  • Myrmicinae as family: Smith, F. 1851: 4 [Myrmicidae]; Smith, F. 1861b: 45 [Myrmicidae]; Smith, F. 1871a: 324 [Myrmicidae]; André, 1882a: 125 [Myrmicidae]; Cresson, 1887: 93 [Myrmicidae]; Emery, 1894g: 383 [Myrmicidae]; Saunders, 1896: 18 [Myrmicidae]; Ashmead, 1905b: 383 [Myrmicidae]; Novák & Sadil, 1941: 71 [Myrmicidae]; Bernard, 1951: 1058 [Myrmicidae]; Bernard, 1953b: 222 [Myrmicidae].
  • Myrmicinae as subfamily of Poneridae: Smith, F. 1858b: 114 [Myrmicidae].
  • Myrmicinae as tribe of Formicidae: André, 1874: 167 [Myrmicidae].
  • Myrmicinae as subfamily of Myrmicidae: Ashmead, 1905b: 383.
  • Myrmicinae as subfamily of Formicidae: Mayr, 1855: 290, 299 [Myrmicidae]; Smith, F. 1857a: 70 [Myrmicidae]; Mayr, 1861: 21 [Myrmicidae]; Smith, F. 1862b: 33 [Myrmicidae]; Mayr, 1862: 738 [Myrmicidae]; Mayr, 1865: 17 [Myrmicidae]; Mayr, 1868b: 24 [Myrmicidae]; Forel, 1870: 307 [Myrmicidae]; Forel, 1874: 22 [Myrmicidae]; Emery, 1877a: 70 [Myrmicidae]; Forel, 1878: 367 [Myrmicidae]; Emery & Forel, 1879a: 456 [Myrmicidae]; André, 1881b: 64 [Myrmicidae]; Nasonov, 1889: 28 [Myrmicidae]; Forel, 1891b: 11 [Myrmicidae]; Forel, 1892j: 220 [Myrmicidae]; Forel, 1893a: 163 [Myrmicinae]; Dalla Torre, 1893: 53; Emery, 1895j: 768 [subfamily spelled Myrmicini]; Emery, 1896e: 179; Forel, 1899c: 30; Forel, 1902f: 520; Bingham, 1903: 105; Ruzsky, 1905b: 103; Wheeler, W.M. 1910g: 138; Emery, 1914a: 29; Wheeler, 1915g: 806 [Myrmicides]; Wheeler, W.M. 1915h: 40; Donisthorpe, 1915d: 74; Arnold, 1916: 166; Escherich, 1917: 2 [Myrmicini]; Forel, 1917: 240 [subfamily spelled Myrmicini]; Bondroit, 1918: 14 [Myrmicitae]; Wheeler, W.M. 1920: 53; Wheeler, W.M. 1922a: 124; Emery, 1921f: 3; Karavaiev, 1934: 59; Clark, 1951: 16; Brown, 1954e: 28; Wheeler, G.C. & Wheeler, J. 1972a: 40; Brown, 1973b: 166; subsequent authors.
  • Myrmicinae as myrmicomorph subfamily of Formicidae: Bolton, 2003: 52, 182.
  • Myrmicinae as formicoid subfamily of Formicidae: Moreau, et al. 2006: 102; Brady, et al. 2006: 18173.
  • Myrmicinae as formicoid myrmicomorph subfamily of Formicidae: Ward, 2007a: 556.

Taxonomic References

Mayr, 1865: 17 (diagnosis); Mayr, 1867a: 91 (diagnosis); Forel, 1878: 367 (diagnosis); Handlirsch, 1907: 872 (*fossil taxa catalogue); Dalla Torre, 1893: 53 (catalogue); Emery, 1895j: 768 (diagnosis); Emery, 1896e: 179 (genera key); Wheeler, W.M. 1910g: 138 (diagnosis); Emery, 1912b: 101 (phylogeny); Emery, 1914a: 34 (phylogeny, tribe key); Arnold, 1916: 164 (diagnosis); Forel, 1917: 240 (synoptic classification); Forel, 1921c: 139 (diagnosis); Emery, 1921f: 3 (diagnosis, tribes and genera key, catalogue); Wheeler, W.M. 1922a: 124, 655 (diagnosis, tribes key); Brown & Nutting, 1950: 126 (venation, phylogeny); Brown, 1954e: 28 (phylogeny); Eisner, 1957: 477 (proventriculus morphology); Bernard, 1967: 93 (diagnosis); Gotwald, 1969: 99 (mouthparts morphology); Wheeler, G.C. & Wheeler, J. 1972a: 40 (diagnosis); Brown, 1973b: 166 (genera, distribution); Wheeler, G.C. & Wheeler, J. 1976b: 52 (larvae, review and synthesis); Kugler, C. 1978a: 413 (sting structure); Kugler, C. 1978b: 267 (pygidial glands); Kugler, C. 1979c: 117 (sting, evolution); Snelling, R.R. 1981: 393 (synoptic classification); Caetano, F.H. 1984: 257 (digestive tract, morphology); Wheeler, G.C. & Wheeler, J. 1985: 257 (synoptic classification); Billen, 1986: 167 (Dufour's gland); Dlussky & Fedoseeva, 1988: 79 (synoptic classification); Hölldobler & Wilson, 1990: 9 onward (synoptic classification, genera keys); Baroni Urbani, et al. 1992: 317 (phylogeny); Bolton, 1994: 75 (diagnosis, synoptic classification, genera keys); Bolton, 1995a: 1040 (census); Bolton, 1995b: 13 (catalogue); Hashimoto, 1996: 354 (phylogenetic position); Baroni Urbani, 2000: 480 (phylogeny); Dlussky & Rasnitsyn, 2002: 422 (diagnosis for wingless fossils); Bolton, 2003: 52, 182 (diagnosis, synopsis); Moreau, et al. 2006: 102 (phylogeny); Brady, et al. 2006: 18173 (phylogeny); Ward, 2007a: 556 (classification); Keller, 2011: 1 (morphology, phylogeny); Ward, et al. 2015: 61 (phylogeny); Boudinot, 2015: 56 (diagnosis); Fisher & Bolton, 2016: 50 (diagnosis).

Regional and National Faunas with Keys

Mayr, 1855: 391 (Austria); Mayr, 1861: 29 (Europe); Mayr, 1868b: 79 (*Baltic Amber); André, 1874: 171 (Europe); Forel, 1874: 29 (Switzerland); Saunders, E. 1880: 213 (Britain); André, 1882c: 256 (Europe and Algeria); Cresson, 1887: 98 (U.S.A. genera); Provancher, 1887: 243 (Canada); Nasonov, 1889: 54 (Russia); Forel, 1891b: 11 (Madagascar genera); Lameere, 1892: 66 (Belgium); Forel, 1902f: 520 (India and Sri Lanka genera); Bingham, 1903: 105 (India, Sri Lanka and Burma); Ruzsky, 1905b: 103 (Russian Empire); Wasmann, 1906: 13 (Luxemburg); Bondroit, 1910: 490 (Belgium); Wheeler, W.M. 1910g: 558 (North America genera); Stitz, 1914: 55 (Central Europe); Gallardo, 1915: 32 (Argentina genera); Forel, 1915d: 8 (Switzerland); Donisthorpe, 1915d: 74 (Britain); Arnold, 1916: 166, 170 (South Africa tribes, genera); Emery, 1916b: 112 (Italy); Wheeler, W.M. 1916m: 581 (U.S.A., Connecticut); Bondroit, 1918: 90 (France and Belgium); Kutter, 1920b: 144 (Switzerland); Soudek, 1922: 20 (Czechoslovakia); Stärcke, 1926: 84 (Netherlands); Karavaiev, 1927c: 256 (Ukraine); Donisthorpe, 1927b: 77 (Britain); Menozzi & Russo, 1930: 170 (Dominican Republic); Gallardo, 1932b: 91 (Argentina, tribes); Arnol'di, 1933b: 596 (Russia); Menozzi, 1933b: 88 (Israel genera); Karavaiev, 1934: 60 (Ukraine); Smith, M.R. 1937: 829 (Puerto Rico); Stitz, 1939: 63 (Germany); Kratochvíl, 1941: 71 (Central Europe); Novák & Sadil, 1941: 71 (Central Europe); Cole, 1942: 360 (U.S.A., Utah); Smith, M.R. 1943f: 291 (U.S.A., males); Holgersen, 1943b: 166 (Norway); Holgersen, 1944: 198 (Norway); Buren, 1944a: 281 (U.S.A., Iowa); Smith, M.R. 1947f: 543 (U.S.A. genera); van Boven, 1947: 170 (Belgium); Creighton, 1950a: 83 (Nearctic); Kusnezov, 1956: 15 (Argentina); Brown, 1958h: 25 (New Zealand); van Boven, 1959: 7 (Netherlands); Gregg, 1963: 288 (U.S.A., Colorado); Wheeler, G.C. & Wheeler, J. 1963: 92 (U.S.A., North Dakota); Collingwood, 1964: 94 (Britain); Bernard, 1967: 95 (Western Europe); Wilson & Taylor, 1967: 13 (Polynesia); van Boven, 1970b: 9 (Netherlands); Kempf, 1972a: 263 (Neotropical, synoptic classification); Bolton, 1973a: 325 (West Africa genera); Bolton & Collingwood, 1975: 3 (Britain); Snelling, R.R. & Hunt, 1976: 70 (Chile); Tarbinsky, 1976: 19 (Kyrghyzstan); van Boven, 1977: 69 (Belgium); Kutter, 1977c: 31 (Switzerland); Arnol'di & Dlussky, 1978: 524 (former European U.S.S.R.); Collingwood, 1978: 75 (Iberian Peninsula); Collingwood, 1979: 36 (Fennoscandia and Denmark); Greenslade, 1979: 20 (South Australia genera); Schembri & Collingwood, 1981: 423 (Malta); Allred, 1982: 438 (U.S.A., Utah); Baroni Urbani, 1984: 76 (Neotropical genera); Verhaeghe, Deligne, et al. 1984: 112 (Belgium genera); Gösswald, 1985: 289 (Germany); Collingwood, 1985: 245 (Saudi Arabia); Wheeler, G.C. & Wheeler, J. 1986g: 20 (U.S.A., Nevada); Nilsson & Douwes, 1987: 57 (Norway); Agosti & Collingwood, 1987b: 265 (Balkans); Dlussky, et al. 1990: 181 (Turkmenistan); Kupyanskaya, 1990: 89 (Far Eastern Russia); Ogata, 1991b: 61 (Japan genera); Morisita, et al. 1992: 1 (Japan); Atanasov & Dlussky, 1992: 51 (Bulgaria); Lattke, in Jaffe, 1993: 153 (Neotropical genera); Arakelian, 1994: 15 (Armenia); Wu, J. & Wang, 1995: 57 (China genera); Kupyanskaya, 1995: 327 (Far Eastern Russia); Collingwood & Agosti, 1996: 308 (Saudi Arabia); Seifert, 1996b: 108 (Central Europe); Skinner & Allen, 1996: 43 (Britain); Collingwood & Prince, 1998: 10 (Portugal); Shattuck, 1999: 39, 122 (Australia genera, synopsis); Andersen, 2000: 37 (northern Australia genera); Zhou, 2001b: 69 (China, Guangxi); Czechowski, et al. 2002: 135 (Poland); Aktaç & Radchenko, 2002: 55 (Turkey genera); Yoshimura & Onoyama, 2002: 424 (Japan genera, males); Mackay & Mackay, 2002: 58 (U.S.A., New Mexico); Palacio & Fernández, in Fernández, 2003d: 244 (Neotropical genera and synopsis); Coovert, 2005: 32 (U.S.A., Ohio); Radchenko, 2005b: 184 (North Korea); Clouse, 2007b: 190 (Micronesia); Seifert, 2007: 110 (North and Central Europe); Terayama, 2009: 131 (Taiwan); Heterick, 2009: 36 (south-western Australia genera); Boer, 2010: 46 (Benelux); Eguchi, et al. 2011: 8 (Vietnam genera); Czechowski, et al. 2012: 344 (Poland); General & Alpert, 2012: 73 (Philippines genera key) ; Dlussky & Perfilieva, 2014: 433 (British Eocene species key); Baccaro, et al. 2015: 82, 202 (Brazil genera key, text).

Taxonomic Notes

Bolton 2003:

The myrmicomorph subfamilies

Subfamilies Agroecomyrmecinae, Myrmicinae.

Diagnosis Paraglossae present on labium (note 1). Antennal sockets vertical or strongly inclined upward toward midline of head (note 2). Torulus not completely fused to frontal lobe. Ocelli absent (note 3). Promesonotal suture usually absent, less commonly vestigial; in the latter case the suture is fully fused and immobile, the pronotum and mesonotum incapable of movement relative to each other (note 4). Metacoxal cavities fully closed, the annulus broad and without a suture (note 5). Propodeal lobes usually present (note 6). Waist of two segments petiole plus postpetiole) (note 7). Petiole with complete tergosternal fusion (note 8). Presclerites present on abdominal segment IV (first gastral) (also in male) the presternite distinctly shorter than the pretergite (note 9). Pretarsal claws without a preapical tooth on the inner margin (note 10). Sting present, usually functional. Jugal lobe absent from hindwing of alates. Pupae naked. [Synopsis, p. 181.]

Notes (1) Paraglossae have not been recorded in Metapone; the presence of paraglossae is regarded as plesiomorphic. (2) For distribution of character see notes under formicomorph subfamilies. In most myrmicomorphs the antennal sockets are relatively widely separated. They are secondarily approximated in tribes such as Stenammini, Solenopsidini and Melissotarsini and secondarily extremely widely separated in Agroecomyrmecini and Cataulacini. (3) Ocelli are considered absent in myrmicomorph workers although in worker polymorphic taxa, especially those with major workers that develop gyne-like characters (for example some Pheidole, Pheidologeton, Oligomyrmex, Atta, Solenopsis geminata group, some Crematogaster depressa group (list is not exhaustive) the largest may have at least a median ocellus present. Elsewhere ocelli, or more usually the median ocellus alone, may be sporadically and perhaps teratologically developed in individuals or nests (observed in Atopomyrmex, Cataulacus, Huberia, Metapone, Monomorium). Ocelli are universal in alate queens and males. (4) In some myrmicomorph taxa a line or feeble indentation across the dorsal alitrunk may indicate the original track of the pro meso notal suture. Elsewhere in the family the suture is also univerally fused and immobile in all dorylomorph subfamilies except Leptanilloidinae, and fused in the poneromorph groups Ectatommini, Paraponerini, Proceratiini and Probolomyrmecini. Plesiomorphic lack of promesonotal fusion, with retained mobility of pronotum and mesonotum relative to one another, is characteristic of the formicomorphs, myrmeciomorphs and leptanillomorphs, as well as the dorylomorph subfamily Leptanilloidinae and all poneromorphs except those mentioned above. (5) For distribution of character see notes under Dolichoderinae. (6) Propodeallobes are universal in myrmicomorphs except for Melissotarsini and some Crematogastrini, where their absence is regarded as a secondary adaptation. For distribution of this character see notes under myrmeciomorph subfamilies. (7) All myrmicomorphs have a two-segmented waist and the character probably represents a single evolutionary event. A single-segmented waist, the plesiomorphic condition, is universal in formicomorphs and poneromorphs except for Paraponerini and a few species of Proceratiini, where segment III is quite reduced and could be termed sub-postpetiolate. Among the myrmeciomorphs, dorylomorphs and leptanillomorphs both counts occur in each group and sometimes both counts occur within a single subfamily, as is the case in Myrmeciinae, Cerapachyinae and Ecitoninae. It is obvious that the reduction of abdominal segment III to a distinct postpetiole has evolved independently many times in Formicidae. (8) For distribution of character see notes under formicomorph subfamilies. (9) The relatively short presternite on abdominal segment IV is also found in Pseudomyrmecinae. This feature has almost certainly arisen independently and is not a myrmicine/pseudomyrmecine synapomorphy. (10) Pretarsal claws are also simple, lacking a preapical tooth, in the formicomorph and leptanillomorph subfamilies. In other subfamily groups such teeth are variously developed, being absent in some taxa, present in others; the presence of such teeth is plesiomorphic.


Diagnosis. With characters of myrmicomorph subfamilies. Clypeus usually inserted between antennal sockets (note 1). Antennal sockets usually not strongly migrated laterally (note 2). Metapleural gland orifice a longitudinal slit or narrow crescent that opens dorsally to posterodorsally, not overhung by a cuticular flange or flap (note 3). Petiole in posterior view with the fused tergile and sternile equally convex, their inner margins forming a circle. Tergite and sternite of helcium together form a rough circle in frontal view, the apices of the two sclerites meet end to end, the tergile does not overlap the sternite; helcium sternite bulges ventrally and is not retracted (note 4) (also in male). Abdominal segment III (postpetiole) usually without tergosternal fusion (note 5); abdominal segment IV without tergosternal fusion (note 6), with or without a stridulitrum on pretergite. Sternite of abdominal segment IV not reduced, the segment not strongly downcurved. Postpygidial glands absent (note 7). [Synopsis, p. 182.]

Notes. (1) Median portion of clypeus fails to extend back between the antennal sockets only in Melissotarsini; this is considered to be an independent apomorphic development of that tribe. (2) The only genus in which the antennal sockets and frontal lobes are strongly migrated laterally is Cataulacus, in which feature it resembles Tatuidris (see above), but otherwise their cephalic morphologies are extremely different. (3) Vertically directed guard-hairs that arise some distance below the orifice are frequently developed. External appearance of the metapleural gland is very similar to that encountered in Ectatomminae; the structure may be synapomorphic. The slit-like orifice of the gland is usually so narrow in Myrmicinae that it is inconspicuous. (4) A ventrally bulging helcium sternite is also developed throughout the dorylomorph subfamilies, in Discothyrea (Proceratiini) and in Tatuidris (Agroecomyrmecini), but in all of these the sternite is retracted, so that tergite overlaps sternite, and the latter is attached some distance up the inner surface of the tergite. (5) Tergosternal fusion of abdominal segment III occurs only in Cataulacini, Cephalotini and Myrmicaria among all the Myrmicinae. This may be a synapomorphy in the first two but is certainly independently derived in the last. For distribution of this character elsewhere in the family see notes under dorylomorph subfamilies. (6) In Ankylomyrma the tergite of abdominal segment IV is enormously hypertrophied; the sternite appears to be a small sclerite fused to the anteroventral rim of the tergite: see under Ankylomyrmini. (7) Postpygidial glands are also absent in the formicomorph subfamilies, almost certainly independently.

Comments (i) This subfamily, overwhelmingly the largest, most diverse and most successful of the Formicidae, is divided into a number of tribes, which are gathered here into formal or informal tribe groups. Some groups of tribes are demonstrably monophyletic (the dacetine-, cephalotine-, and attine tribe groups) but the remainder are grouped only by inclusive diagnoses, so their monophyly remains in doubt. Within this latter set of groups some individual tribes are demonstrably monophyletic but others are not. A number of new, mainly monogeneric, tribes have been set up to accommodate the more obvious problem areas. In general these are taxa with a wealth of autapomorphic developments but a dearth of recognisable synapomorphies. (ii) Many of the extreme inquilines (workerless permanent social parasites) encountered in the Myrmicinae will fail taxon diagnosis because of their "inquiline syndrome" habitus and grossly convergent morphological reductions and modifications, acquired in response to their unique way of life. Inclusion of such forms in higher taxa must rest upon molecular analysis, for instance the proof by Sanetra & Buschinger (2000) that the extreme inquilines Anergates and Teleutomyrmex are correctly grouped with Tetramorium. (iii) For another possible Ectatommini/Myrmicinae synapomorphy (as well as (3) above) see comments under the former.