Dilobocondyla

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Dilobocondyla
Dilobocondyla fouqueti
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Dilobocondyla
Santschi, 1910
Type species
Atopomyrmex selebensis, now Dilobocondyla selebensis
Diversity
21 species
(Species Checklist)

Dilobocondyla fouqueti casent0178565 profile 1.jpg

Dilobocondyla fouqueti

Dilobocondyla fouqueti casent0178565 dorsal 1.jpg

Specimen Label

Synonyms

We have rarely encountered foraging workers of Dilobocondyla (in Vietnam) on leaves in undergrowth of natural and man-made forests. (Eguchi, Bui and Yamane 2011)

Identification

Zettel and Bruckner (2013) - Worker (modified from Bolton 1994, General & Alpert 2012): Head massive, with posterior corners angulate or dentate. Frontal carinae well-developed. Antennal scrobe present dorsal of eye. Clypeus medially slightly emarginated, with stout median seta. Mandible striated, with six teeth on masticatory margin, with unarmed basal margin. Antenna twelve-segmented, apically with moderately widened three-segmented club. Pronotum with toothed corners. Propodeum without teeth; propodeal lobes large and rounded in Philippine species. Petiole almost cylindrical, lacking a distinct node, anteroventrally toothed. Head and mesosoma with rugous, often coarse sculpture; gaster with microsculpture. Entire body including scape, femora, tibiae, and first tarsomeres with erect, stout setae.

Yellowish to light brown. Posterior margin of head concave. Frontal carinae strong, reaching posterior corners of head. Sculpture on head coarse, on mesosoma moderately coarse; interspaces on head reticulated and matt, on mesosoma, petiole, and postpetiole usually smooth, only mesosoma dorsally with reduced micropuncturation and petiole anterodorsally reticulated. Petiole very slender; PtI 202 - 210.

Eguchi, Bui and Yamane (2011) - Worker monomorphic; head in full-face view subrectangular; preoccipital carina distinct laterally; posterolateral corner of head with a small acute angle or denticle exterior to preoccipital carina; frontal carina distinct; antennal scrobe shallow but distinct; median portion of clypeus broadly inserted between frontal lobes; anterior clypeal margin weakly convex and with a weak emargination at midpoint; median clypeal seta, if present, indistinct; mandible triangular, with 6 teeth on masticatory margin; antenna 12-segmented, with conspicuous 3-segmented club; eye relatively large; promesonotum in lateral view hardly or weakly raised; promesonotal suture absent dorsally; metanotal groove weakly impressed dorsally; propodeum in lateral view weakly swollen posterodorsad, unarmed; propodeal lobe well developed; femora strongly and abruptly incrassate in distal two thirds; petiole elongate, cylindrical, slightly arcuate in lateral view; subpetiolar process distinct, tooth-like, located anteroventrally near articulation with mesosoma; postpetiole in lateral view with acute anteroventral angle; gaster short, oval in dorsal view.

The worker of Dilobocondyla is easily distinguished from that of other myrmicine genera known from Vietnam by posterolateral corner of head with a small acute angle or denticle exterior to preoccipital carina, propodeum unarmed, femora strongly and abruptly incrassate, and petiole elongate and sylindrical.

Keys including this Genus

Keys to Species in this Genus

Distribution

World distribution based on political regions. View/Edit Data
Dilobocondyla Distribution.png Worlddistribution legend.jpg

Species richness

Species richness by country based on regional taxon lists (countries with darker colours are more species-rich). View Data

Dilobocondyla Species Richness.png

Biology

Wheeler's remarks, from 1924, still largely sum up what we know about these ants: All the species of Dilobocondyla seem to be rare and very local ants and are therefore known mostly from single specimens. Like the species of the allied genus Podomyrma they nest as rather small colonies in the wood of living trees.

Castes

Morphology

Worker Morphology

 • Antennal segment count 12 • Antennal club 3 • Palp formula 4,3; 3,3 • Spur formula 0, 0 • Sting present

Male Morphology

 • Antennal segment count 13 • Antennal club 0 • Palp formula 4,3 • Total dental count 5 • Spur formula 0, 0

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • DILOBOCONDYLA [Myrmicinae: Formicoxenini]
    • Dilobocondyla Santschi, 1910h: 283. Type-species: Atopomyrmex selebensis, by subsequent designation of Wheeler, W.M. 1911f: 162.
    • Dilobocondyla senior synonym of Mesomyrma: Emery, 1912b: 102.
  • MESOMYRMA [junior synonym of Dilobocondyla]
    • Mesomyrma Stitz, 1911a: 363 [as subgenus of Podomyrma]. Type-species: Podomyrma (Mesomyrma) cataulacoidea, by monotypy.
    • Mesomyrma junior synonym of Dilobocondyla: Emery, 1912b: 102; Emery, 1924d: 240.

References

  • Bolton, B. 1994. Identification guide to the ant genera of the world. Cambridge, Mass.: Harvard University Press, 222 pp. (page 105, Dilobocondyla in Myrmicinae, Formicoxenini)
  • Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 246, Dilobocondyla in Myrmicinae, Formicoxenini)
  • Dlussky, G. M.; Fedoseeva, E. B. 1988. Origin and early stages of evolution in ants. Pp. 70-144 in: Ponomarenko, A. G. (ed.) Cretaceous biocenotic crisis and insect evolution. Moskva: Nauka, 232 pp. (page 79, Dilobocondyla in Myrmicinae, Podomyrmini)
  • Emery, C. 1912b. Études sur les Myrmicinae. [I-IV.]. Ann. Soc. Entomol. Belg. 56: 94-105 (page 102, Dilobocondyla senior synonym of Mesomyrma)
  • Emery, C. 1912b. Études sur les Myrmicinae. [I-IV.]. Ann. Soc. Entomol. Belg. 56: 94-105 (page 105, Dilobocondyla in Myrmicinae, Myrmecinini)
  • Emery, C. 1914e. Intorno alla classificazione dei Myrmicinae. Rend. Sess. R. Accad. Sci. Ist. Bologna Cl. Sci. Fis. (n.s.) 18: 29-42 (page 41, Dilobocondyla in Myrmicinae, Myrmecinini)
  • Emery, C. 1924f [1922]. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C: 207-397 (page 240, Dilobocondyla in Myrmicinae, Myrmecinini [subtribe Podomyrmini])
  • Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 244, Dilobocondyla in Myrmicinae, Myrmecinini)
  • Santschi, F. 1910h. Deux nouvelles fourmis du Tonkin. Naturaliste 32: 283-284 (page 283, Dilobocondyla as genus)
  • Wheeler, W. M. 1911g. A list of the type species of the genera and subgenera of Formicidae. Ann. N. Y. Acad. Sci. 21: 157-175 (page 162, Type-species: Atopomyrmex selebensis; by subsequent desgination)
  • Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 663, Dilobocondyla in Myrmicinae, Myrmecinini)
  • Wheeler, W. M. 1924c. Ants of Krakatau and other islands in the Sunda Strait. Treubia 5: 239-258 (page 248, Key to species)