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Species: Pheidole thrasys   Wilson, 2003 

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Note: Not a Valid Taxon Name

Current Valid Name:

Pheidole simonsi

Taxonomic History (provided by Barry Bolton, 2019)

Pheidole thrasys Wilson, 2003A: 631, figs. (w.) PANAMA. Neotropic. AntCat AntWiki HOL

Taxonomic history


  Geographic regions: Not found on any curated Geolocale/Taxon lists.


J. Longino, 17 Mar 2014: Wilson named four species from Mexico and Central America that are all extremely similar and together form a very distinctive group with no similar species in the region. They are thrasys from Panama, simonsi from Costa Rica, gangamon from southern Mexico, and arctos from Tamaulipas, Mexico. Minor workers all look identical to me. Major workers show some geographic variation, with southern versions having longer, thinner propodeal spines, and the dorsal pilosity is longer. Specimens from Guatemala northward have shorter propodeal spines and are more bristly-looking, with shorter dorsal pilosity. DNA barcoding data are all from the southern populations and show two clusters. One has numerous Panama specimens and one specimen from Guanacaste, Costa Rica. Another cluster has numerous specimens from Guanacaste and many specimens from the Atlantic lowlands of Costa Rica, Nicaragua, and southern Honduras. There is clearly one clade that is common in lowland wet forest throughout Central America and southern Mexico, exhibiting what appears to be uniform habitat preference, behavior, and nesting habits. It will probably emerge as a set of cryptic species, but at present I have no evidence of sharp morphological discontinuities at any one site or anywhere across the range of the clade. I am treating them all as simonsi (just because I started using that name first, for Costa Rican material) until further evidence.

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press

Pheidole thrasysHNS new species

Types Mus. Comp. Zool. Harvard.

Etymology Gr thrasysHNS, bold, courageous.

Diagnosis A member of the scrobiferaHNS group known only from the minor, close to arctosHNS of northeastern Mexico and epetrionHNS of Ecuador, differing in the narrowed occiput, possession of a nuchal collar, and completely smooth and shiny mesonotum; also close to simonsiHNS, differing in its narrower occiput, well-developed nuchal collar, and yellow tarsi.

Measurements (mm) Holotype minor: HW 0.60, HL 0.62, SL 0.60, EL 0.12, PW 0.40.

Color Minor: body dark brown, tarsi yellow, rest of appendages light yellow.

Range Known only from the type locality, and from Lancetilla, near Tela, Honduras (W. L. Brown).

Biology The Honduras series was collected in wet lowland forest.

Figure Holotype, minor. PANAMA: Barro Colorado Island (William L. Brown and Elwood S. McCluskey). Scale bar = 1 mm.

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