Brachymyrmex minutus

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Brachymyrmex minutus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Myrmelachistini
Genus: Brachymyrmex
Species: B. minutus
Binomial name
Brachymyrmex minutus
Forel, 1893

Brachymyrmex minutus casent0103625 profile 1.jpg

Brachymyrmex minutus casent0103625 dorsal 1.jpg

Specimen labels

Forel (1893) found several colonies subterraneous at the roots of sod, usually where it overgrows rocks, typically within the forest and/or nearby streams. The nest of B. minutus consists of large tunnels with small chambers at intervals. Colonies contain ~ 50 to 100 individuals, with a single queen.

Identification

Ortiz-Sepulveda et al. (2019) - Brachymyrmex minutus morphologically resembles Brachymyrmex australis, Brachymyrmex aphidicola, and Brachymyrmex termitophilus, because all these species have eyes located on the cephalic midline, a mesonotum that does not bulge dorsally above the pronotum in lateral view, and yellowish body color. Brachymyrmex minutus differs from the three other species, or any other Brachymyrmex species for that matter, by having a very inconspicuous mesometanotal suture, giving the impression that the mesonotum and metanotum are fused. Additionally, B. minutus differs from B. termitophilus by having scattered pubescence on the gaster, from B. aphidicola by the presence of only two erect hairs on the pronotum and from B. australis by having scapes that surpass the posterior margin of the head by a length that is smaller than the maximal diameter of the eye.

Keys including this Species

Distribution

In Florida this is an uncommon species that is thought to be a human introduction from the West Indies. It is known from tropical hammocks in Dade and Monroe counties. Nests are in leaf litter. The identity of this species and virtually all other Brachymyrmex is problematical. Pest status: none. First published Florida record: Ferster and Prusak 1994; earlier specimens: 1984. (Deyrup, Davis & Cover, 2000.)


Latitudinal Distribution Pattern

Latitudinal Range: 23.133° to -24.1°.

   
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Bolivia, Brazil, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, French Guiana, Greater Antilles, Guatemala, Lesser Antilles, Martinique, Mexico, Netherlands Antilles, Panama, Paraguay, Peru, Suriname, Venezuela.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Queen

Nomenclature

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

  • minutus. Brachymyrmex minutus Forel, 1893g: 346 (w.q.) ST VINCENT & THE GRENADINES (St Vincent I.), VIRGIN IS (St Thomas I.).
    • Status as species: Wheeler, W.M. 1905b: 111, 132; Forel, 1912i: 62; Wheeler, W.M. 1922c: 15; Santschi, 1923b: 667; Emery, 1925b: 43; Stärcke, 1926: 118 (in key); Aguayo, 1932: 224; Smith, M.R. 1954c: 11; Kempf, 1972a: 40; Alayo, 1974: 26 (in key); Bolton, 1995b: 82; Deyrup, et al. 2000: 301; Deyrup, 2003: 44; Deyrup, 2017: 181; Fernández & Ortiz-Sepúlveda, 2019: 728; Ortiz-Sepúlveda, et al. 2019: 509 (redescription).

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Ortiz-Sepulveda et al. (2019) - Lectotype and paralectotypes (n = 4). HL1 0.37–0.40; HL2 0.25–0.31; HL30.07–0.10; HW 0.32–0.36; SL 0.32–0.36; EL 0.08–0.11; WL n.a.; PnL n.a.; PnW 0.20–0.24; ML 0.06–0.07; MW 0.14–0.15; Indices CI 85.88–89.29; SI1 92.59–108.00; SI2 107.14–126.67; OI1 26.03–29.63; OI2 20.00–25.27.

Head. Slightly longer than wide in full face view; posterior cephalic margin weakly convex. Dorsum of the head with sparse hairs. Clypeus with a rounded anterior margin and five long, erect hairs of which a single, usually conspicuous hair is near the anterior margin, two hairs are in mediolateral position, and two more near the toruli; other hairs on the clypeus are markedly shorter and appressed or decumbent. Toruli surpassing the posterior clypeal margin in oblique anterodorsal oblique view. The scapes surpass the posterior margin of the head by a length that is smaller than the maximal diameter of the eye; they have appresed pubescence. Ocelli absent. Eyes are positioned on the cephalic midline and have 8–9 ommatidia along their maximal diameter.

Mesosoma. Typically with two erect hairs on the pronotum and without erect hairs on the mesonotum. The mesonotum is not inflated and does not bulge dorsally above the pronotum in lateral view. Mesometanotal suture inconspicuous, giving the impression that the mesonotum and metanotum are fused. Metanotal groove absent or narrower than the diameter of the metathoracic spiracles. Metathoracic spiracles in dorsolateral position, not protruding, and touching the propodeal suture. Dorsum of the propodeum slightly convex and shorter than the propodeal slope. Propodeal spiracles circular, positioned on the posterior propodeal margin, just dorsally at the middle of the propodeal slope. Legs with appressed and scattered hairs. Petiole short and inclined forward.

Gaster. With scarce pubescence and several scattered long suberect hairs.

Color and sculpture. Body smooth, or finely granulated and shiny, sometimes with some imbricate sculpture on the dorsum of the mesosoma. Body usually yellowish, but sometimes reddish.

Type Material

Ortiz-Sepulveda et al. (2019) - Brachymyrmex minutus Forel, 1893: 346 (w.q.). Lectotype worker (Musee d'Histoire Naturelle Genève: USNMENT00757150) and paralectotype workers, queen (MHNG: USNMENT00757149–00757151; USNMENT00758110–00758112; here designated): 15 workers, one queen [examined]. ANTILLES: Saint Vincent. See also: Santschi (1923a: 667).

The lectotype is designated here as the second ant counting from the top of pin MHNG: USNMENT00757150, whereas the other specimens on that pin are paralectotypes.

References

References based on Global Ant Biodiversity Informatics

  • Aguayo C. G. 1932. Notes on West Indian ants. Bulletin of the Brooklyn Entomological Society 27: 215-227.
  • Alayo D. P. 1974. Introduccion al estudio de los Himenopteros de Cuba. Superfamilia Formicoidea. Academia de Ciencias de Cuba. Instituto de Zoologia. Serie Biologica no.53: 58 pp. La Habana.
  • Boer P. 2019. Ants of Curacao, species list. Accessed on January 22 2019 at http://www.nlmieren.nl/websitepages/SPECIES%20LIST%20CURACAO.html
  • Boer P. 2019. Ants of Saba, species list. Accessed on January 22 2019 at http://www.nlmieren.nl/websitepages/SPECIES%20LIST%20SABA.html
  • Culver D. C. 1974. Species packing in Caribbean and North Temperate ant communities. Ecology 55(5): 974-988.
  • Dattilo W. et al. 2019. MEXICO ANTS: incidence and abundance along the Nearctic-Neotropical interface. Ecology https://doi.org/10.1002/ecy.2944
  • Deyrup M., L. Davis, and S. Buckner. 1998. Composition of the ant fauna of three Bahamian islands. Proceedings of the seventh symposium on the natural history of the Bahamas. 23-32. Bahamian Field Station, San Salvador, Bahamas
  • Fernandes, P.R. XXXX. Los hormigas del suelo en Mexico: Diversidad, distribucion e importancia (Hymenoptera: Formicidae).
  • Fernandez Triana J. L., H. Sariol, M. A. Vega Castillo, S. Ricardo, M. Gonzalez, and E. P. Ferrer. 2002. Datos preliminares dobre la biodiversidad del orden Hymenoptera en la provincia Granma, Cuba. Bol. S.E.A. 31: 43-48.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Fontanla Rizo J.L. 1997. Lista preliminar de las hormigas de Cuba. Cocuyo 6: 18-21.
  • Fontenla J. L., and J. Alfonso-Simonetti. 2018. Classification of Cuban ants (Hymenoptera: Formicidae) into functional groups. Poeyana Revista Cubana de Zoologia 506: 21-30.
  • Fontenla Rizo J. L. 1993. Composición y estructura de comunidades de hormigas en un sistema de formaciones vegetales costeras. Poeyana. Instituto de Ecología y Sistemática, Academia de Ciencias de Cuba 441: 1-19.
  • Fontenla Rizo J. L. 1993. Mirmecofauna de Isla de la Juventud y de algunos cayos del archipielago cubano. Poeyana. Instituto de Ecologia y Sistematica, Academia de Ciencias de Cuba 444:1-7.
  • Fontenla Rizo J. L. 1997. Lista preliminar de las hormigas de Cuba (Hymenoptera: Formicidae). Cocuyo 6: 18-21.
  • Forel A. 1912. Formicides néotropiques. Part VI. 5me sous-famille Camponotinae Forel. Mémoires de la Société Entomologique de Belgique. 20: 59-92.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
  • Koptur, S., M. Palacios-Rios, C. Diaz-Castelazo, W. P. Mackay, and V. Rico-Gray. 2013. Nectar secretion on fern fronds associated with lower levels of herbivore damage: field experiments with a widespread epiphyte of Mexican cloud forest remnants. Annals of Botany 111: 1277-1283.
  • Llyod, Morrison W. 2002. Island bigeography and metapopulation dynamics of Bahamianan ants. Journal of Biogeography. 29:387-394.
  • Longino, J.T. 2010. Personal Communication. Longino Collection Database
  • Morrison L. W. 1998. A review of Bahamian ant (Hymenoptera: Formicidae) biogeography. Journal of Biogeography 25: 561-571.
  • Morrison, Lloyd W. 1998. The Spatiotemporal Dynamics of Insular Ant Metapopulations. Ecology. 79(4):1135-1146.
  • Morrison, Lloyd. 2006. The Ants of Small Bahamian Cays. Bahamas Naturalist & Journal of Science. 1(2):27-32.
  • Ortiz-Sepuvelda C. M., B. Van Bocxlaer, A. D. Meneses, and F. Fernandez. 2019. Molecular and morphological recognition of species boundaries in the neglected ant genus Brachymyrmex (Hymenoptera: Formicidae): toward a taxonomic revision. Organisms Diversity & Evolution https://doi.org/10.1007/s13127-019-00406-2
  • Portuondo E. F., and J. L. Reyes. 2002. Mirmecofauna de los macizos montañosos de Sierra Maestra y Nipe-Sagua-Baracoa. Cocuyo 12: 10-13
  • Portuondo E. F., and J. L. Reyes. 2006. Species of Hymenoptera recorded in the Reserva Ecológica Pico Mogote, Santiago de Cuba Province, 20-25 September 2002. In: Maceira F., D., A. Fong G., y/and W. S. Alverson, eds. 2006. Cuba: Pico Mogote. Rapid Biological Inventories Report 09. The Field Museum, Chicago.
  • Portuondo Ferrer E., and J. L. Fernández Triana. 2005. Species of hymenopterans (bees, wasps, and ants) recorded in Alejandro de Humboldt National Park, from literature records, revision of the collection at BIOECO, and collections before and during the rapid inventory, 12-22 February 2004. In Fong G., A., D. Maceira F., W. S. Alverson, y/and T. Wachter, eds. 2005. Cuba: Parque Nacional “Alejandro de Humboldt.” Rapid Biological Inventories Report 14. The Field Museum, Chicago.
  • Portuondo Ferrer, E. and J. Fernandez Triana. Biodiversidad del orden Hymenoptera en Los Macizos Montanosos de Cuba Oriental. Boletin S.E.A. 35:121-136.
  • Reyes, J. L. "Inventario de la colección de hormigas (Hymenoptera: Formicidae) del Centro Oriental de Ecosistemas y Biodiversidad, Santiago de Cuba, Cuba." Boletín de la Sociedad Aragonesa 36 (2005): 279-283.
  • Santschi F. 1923. Revue des fourmis du genre Brachymyrmex Mayr. Anales del Museo Nacional de Historia Natural de Buenos Aires 31: 650-678.
  • Smith, Marion R. 1954. American Museum Novitates. Ants of the Bimini Island Group, Bahamas, British West Indies (Hymenoptera, Formicidae). 1671:1-16
  • Smith, Marion R. 1954. Ants of the Bimini Island Group, Bahamas, British West Indies. American Museum of Natural History. 1671. 1-16.
  • Torres J.A. 1984. Niches and Coexistence of Ant Communities in Puerto Rico: Repeated Patterns. Biotropica 16(4): 284-295.
  • Vásquez-Bolaños M. 2011. Lista de especies de hormigas (Hymenoptera: Formicidae) para México. Dugesiana 18: 95-133
  • Wheeler W. M. 1905. The ants of the Bahamas, with a list of the known West Indian species. Bulletin of the American Museum of Natural History 21: 79-135.
  • Wheeler W. M. 1908. The ants of Jamaica. Bulletin of the American Museum of Natural History 24: 159-163.
  • Wheeler W. M. 1922. The ants of Trinidad. American Museum Novitates 45: 1-16.