Current View: All Antweb
Change View
Cite this page

Citing AntWeb


To cite this page, please use the following:

· For print:      Citation: AntWeb. Version 8.86.1. California Academy of Science, online at Accessed .

· For web:

Species: Pheidole optiva   Forel, 1901 

Download Data

Current Valid Name:

Taxonomic History (provided by Barry Bolton, 2023)

Pheidole optiva Forel, 1901d PDF: 132 (s.w.) MEXICO (Morelos). Neotropic. Primary type information: Primary type material: syntype major workers, syntype minor workers (numbers not stated). Primary type locality: Mexico: Morelos, Cuernavaca (W.M. Wheeler). Primary type depositories: MCZC, MHNG. AntCat AntWiki HOL

Taxonomic history

Status as species: Emery, 1922c PDF: 101; Kempf, 1972b PDF: 198; Bolton, 1995b: 326; Wilson, 2003a: 333 (redescription).
// Distribution


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


J. Longino, 25 Apr 2014: Very similar to P. piceonigra.

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 optivaHNS Forel

Pheidole optivaHNS Forel 190ld: 132.

Types Mus. Hist. Nat. Geneve; Mus. Comp. Zool. Harvard.

Etymology Unknown.

Diagnosis A member of the fallaxHNS group, sharing some traits with sciaraHNS but differing from it and other group members as follows. Major: antennal scapes reaching a little less than midway between eyes and occipital comers; carinulae of dorsal head surface also reaching halfway between eye and occipital comers; dorsal head surface foveolate except for frontal triangle, mid-clypeus, and occipital border, which are smooth and shiny; pronotal dorsum and rest of mesosoma foveolate, lacking carinulae; pronotum in dorsaloblique view a single convexity peaked at humerus; propodeal spines directed posteriorly; postpetiole elliptical from above; pilosity sparse to moderate over body, and on the first gastral tergite consisting substantially of short subrecumbent hairs. Minor: eyes medium in size, with Eye Length one-fifth Head Width; all of head, mesosoma, and waist foveolate and opaque to feebly shiny; occiput broad and concave in frontal view.

Measurements (mm) Syntype major: HW 1.12, HL 1.20, SL 0.64, EL 0.14, PW 0.60. Syntype minor: HW 0.60, HL 0.70, SL 0.68, EL 0.12, PW 0.42.

COLOR Major: body light reddish brown except for gaster, which is medium reddish brown. Minor: body medium reddish yellow except for gaster, which is dark reddish yellow.

Range Known only from the type locality.

biology Wheeler (190lh) took the type series, which he transmitted to Forel, from large colonies nesting beneath tree-shaded stones in a ravine at Cuemavaca. Both the majors and minors were "remarkably slow" in their movements.

Figure Upper: syntype, major. Lower: syntype, minor. MEXICO: Cuernavaca, Morelos (William M. Wheeler). Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 2 times found in Subtropical woodland.

Found most commonly in these microhabitats: 1 times under rock, 1 times under boulder.

Elevations: collected from 1569 - 2256 meters, 1912 meters average

Collect Date Range: collected between 1952-01-15 00:00:00.0 and 1974-10-27 00:00:00.0

Type specimens: syntype of Pheidole optiva: casent0908146, casent0908147

See something amiss? Send us an email.
Log In to see maps.