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Species: Pheidole phanigaster   Longino, 2009 

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Taxonomic History (provided by Barry Bolton, 2023)

Pheidole phanigaster Longino, 2009 PDF: 61, fig. 17 (s.w.) MEXICO (Chiapas). Neotropic. Primary type information: Primary type material: holotype major worker. Primary type locality: Mexico: Chiapas, 21 km. SW Salto de Agua, 17.38542°N, 92.42802°W±200 m., 180 m.,, LLAMA Ba-A-08-3-02-10. Primary type depository: UNAM. Secondary type information: Secondary type material: paratype major workers, paratype minor workers (numbers not stated). Secondary type locality: same as for holotype. Secondary type depositories: BMNH, CASC, FMNH, INBC, JTLC, LACM, MCZC, MHNG, MIZA, MZSP, UCDC, UNAM, USNM. AntCat AntWiki HOL

Taxonomic history

// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Mexico
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:

Mexico (Chiapas).


This species is known from numerous baiting samples in wet forest habitat, in one locality in the northern Chiapas lowlands.

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Longino, J. T., 2009, Additions to the taxonomy of New World Pheidole (Hymenoptera: Formicidae)., Zootaxa 2181, pp. 1-90

Pheidole phanigasterHNS new species

Figure 17

Holotype major worker. Mexico, Chiapas: 21km SW Salto de Agua, 17.38542°N 92.42802°W, ±200m, 180m, 15 Jun 2008 (LLAMA#Ba-A-08-3-02-10) [UNAM, unique specimen identifier CASENT0609087]. Paratypes: major and minor workers. Same data as holotype [BMNH, CAS, FMNH, INBC, JTLC, LACM, MCZ, MHNG, MIZA, MZSP, UCD, UNAM, USNM].

Geographic Range

Mexico (Chiapas).


With the morphometric profile of P. anastasiiHNS but the shape and general habitus of P. nebulosaHNS. Minor worker: scape relatively long (SI 119-122) versus short (SI 104-106) ( nebulosaHNS); gastral dorsum shiny versus matte ( anastasiiHNS); postpetiole in dorsal view lenticular versus flask-shaped, widest posterior to midlength ( anastasiiHNS). Major worker: inner hypostomal teeth present and separated from median tooth versus medial hypostomal margin with large blunt medial tooth only ( nebulosaHNS); postpetiole in dorsal view lenticular, widest at or anterior to midlength, versus postpetiole flask-shaped, widest posterior to midlength ( anastasiiHNS); color red brown versus usually yellow orange ( anastasiiHNS).

Description of minor worker

Measurements (paratype): HL 0.49, HW 0.43, HLA 0.17, SL 0.52, EL 0.10, ML 0.55, PSL 0.05, PMG 0.00, SPL 0.03, PTW 0.07, PPW 0.11, CI 88, SI 120, PSLI 10, PMGI 0, SPLI 5, PPI 147.

Measurements (n=7): HL 0.46-0.50, HW 0.39-0.44, SL 0.46-0.53, CI 84-89, SI 119-122.

Mandible smooth and shiny; clypeus foveolate; face uniformly foveolate; margin of vertex rounded with median impression; occipital carina narrow, not or barely visible in full face view; scape with appressed pubescence and sparse, fine erect setae, these longer than maximum width of scape; promesonotal groove absent; propodeal spines present; entire mesosoma foveolate; mesosomal dorsum with about six pairs erect setae; dorsal (outer) margin of hind tibia with short decumbent pilosity, no long erect setae; first gastral tergum smooth and shining; gastral dorsum with moderately abundant erect setae; color orange.

FIGURE 17. Pheidole phanigasterHNS. Major worker: A, face view; B, lateral view; C, dorsal view; D, hypostomal margin. Minor worker: E, face view; F, lateral view; G, dorsal view; H, hind tibia. A-C, Holotype major worker; D, non-type major worker; E-H, Paratype minor worker. Scale bar 0.5mm for E, F, G, 1mm for others.

Description of major worker

Measurements (holotype): HL 1.08, HW 1.01, HLA 0.28, SL 0.61, EL 0.15, ML 0.86, PSL 0.11, PMG 0.00, SPL 0.05, PTW 0.12, PPW 0.26, IHT 0.24, OHT 0.39, CI 94, SI 60, PSLI 10, PMGI 0, SPLI 4, PPI 207, HTI 60.

Measurements (n=7): HL 0.95-1.08, HW 0.90-1.03, SL 0.58-0.62, CI 94-97, SI 60-64.

Mandible smooth and shiny; clypeus shiny, slightly concave, with median carina and parallel longitudinal carinulae laterally, with prominent anterior notch; face foveolate throughout, overlain with parallel rugulae on malar spaces and between frontal carinae, becoming more reticulate and fainter posteriorly; head with abundant suberect setae projecting from sides of head in face view; scape smooth and shining, terete at base, with sparse erect setae longer than maximum width of scape; hypostomal margin flat, median tooth present, usually prominent and larger than inner hypostomal teeth; inner hypostomal teeth present, stout, about one half distance from midline to outer hypostomal teeth; promesonotal groove not distinct; propodeal spines present; mesosoma largely foveolate, with shiny area at anterodorsal margin of pronotum; dorsal (outer) margin of hind tibia with appressed pubescence, no longer erect setae; pilosity abundant on mesosomal dorsum; postpetiole in dorsal view lenticular, widest at midlength, conules moderately developed; first gastral tergite matte, with abundant long stiff erect setae; head and mesosoma generally red brown with greater infuscation on mesosomal dorsum, first gastral tergum orange anteriorly, posterior portion and rest of gastral dorsum darker red brown.


This species is known from numerous baiting samples in wet forest habitat, in one locality in the northern Chiapas lowlands.


The name is in reference to the smooth and shiny gaster of the minor worker, in contrast to the matte gaster of the similar P. anastasiiHNS.

Specimen Habitat Summary

Found most commonly in these habitats: 23 times found in 2º wet forest, 1 times found in 2� wet forest.

Found most commonly in these microhabitats: 23 times at bait.

Collected most commonly using these methods: 23 times Baiting, 1 times at bait.

Elevations: collected at 180 m

Collect Date Range: collected on 2008-06-15 00:00:00.0

Type specimens: Holotype Pheidole phanigaster: casent0609087; Paratype: fmnhins0000050038, fmnhins0000050039; Paratype Pheidole phanigaster: casent0609088, casent0609089, casent0609090, casent0609091, casent0609092, casent0609093, casent0609094, casent0609095, casent0609096, casent0609097, casent0609098, casent0609099, casent0609100, casent0609101, casent0609102, casent0609103, casent0609104, casent0609105, casent0609108, casent0609545, casent0609546, casent0609547, casent0609548

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