Pheidole macclendoni

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Pheidole macclendoni
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. macclendoni
Binomial name
Pheidole macclendoni
Wheeler, W.M., 1908

Pheidole macclendoni casent0103475 profile 1.jpg

Pheidole macclendoni casent0103475 dorsal 1.jpg

Specimen Label

In western Texas Moody and Francke (1982) discovered two colonies nesting in open soil and one beneath a clump of grass. Winged queens were found by William S. Creighton at Dryden, Texas, on 29 December. (Wilson 2003)

Identification

The majors of this species can be recognized by having a flattened, rugose area located between the frontal lobe and the eye, with large, intrarugal foveolae, and the petiole has a large, prominent lateral spiracle. The head of the major is large, at least 2 millimeters in total length, excluding the mandibles. The pronotum of the major has transverse striae. (Mackay and Mackay 2002)

Also see the description in the nomenclature section.

Keys including this Species

Distribution

Evidently scarce, recorded from Arizona, as well as central and western Texas. (Wilson 2003)

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Habitat

Sandy-gravely desert (Cole, 1957b).

Biology

This species nests in the soil, with the nest marked by a small entrance. (Mackay and Mackay 2002)

Castes

This species is weakly polymorphic.

Worker

Minor

Major

Male

Additional images can be found here

Nomenclature

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

  • macclendoni. Pheidole macclendoni Wheeler, W.M. 1908e: 450, pl. 27, fig. 36 (s.w.) U.S.A. See also: Wilson, 2003: 582.

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

Description

From Wilson (2003): DIAGNOSIS A member of the “bicarinata complex” of the larger pilifera group, comprising Pheidole agricola, Pheidole aurea, Pheidole barbata, Pheidole bicarinata, Pheidole centeotl, Pheidole cerebrosior, Pheidole defecta, Pheidole gilvescens, Pheidole macclendoni, Pheidole macrops, Pheidole marcidula, Pheidole paiute, Pheidole pinealis, Pheidole psammophila, Pheidole xerophila, Pheidole yaqui and Pheidole yucatana, which complex is characterized by the large to very large, forward-set eyes of both castes, especially the minor; and, in the major, the occipital lobes lacking any sculpturing (except in aurea); the posterior half of the head capsule almost entirely smooth and shiny; and the postpetiolar node seen from above oval, elliptical, or laterally angulate (cornulate in cerebrosior).

P. macclendoni is distinguished by the presence of a supermajor in addition to the major caste and is further distinguished by the following traits.

Major: long, thin propodeal spine; prominent humeral lobe in dorsal-oblique view; bell-shaped postpetiolar node seen from above.

Supermajor: lacks sculpturing on the posterior half of the head.

Minor: propodeal spines reduced to denticles; humerus subangulate in dorsal-oblique view; very low postpetiolar node in side view;bell-shaped postpetiolar node seen from above.

MEASUREMENTS (mm) Lectotype major: HW 1.50, HL 1.60, SL 0.82, EL 0.26, PW 0.74. Paralectotype supermajor: HW 2.74, HL 2.58, SL 1.02, EL 0.34,. PW (not measured). Paralectotype minor: HW 0.62, HL 0.64, SL 0.60, EL 0.18, PW 0.38.

COLOR Major: reddish yellow, gaster a slightly contrasting yellowish brown.

Supermajor: concolorous reddish yellow.

Minor: body light brown, appendages a lighter shade of yellowish brown.


Pheidole macclendoni Wilson 2003.jpg

Figure. Upper: lectotype, major (body and full head), Corsicana, in Navarro Co. near Dallas, Texas. Paralectotype, supermajor (partial head only), Benson, Cochise Co., Arizona. Lower: paralectotype, minor, Laredo, Webb Co., Texas. Scale bars = 1 mm.

Syntype Specimen Labels

Type Material

American Museum of Natural History and Museum of Comparative Zoology - as reported in Wilson (2003)

Etymology

Eponymous (Wilson 2003)

References

  • Mackay, W. P. and E. Mackay. 2002. The ants of New Mexico (Hymenoptera: Formicidae). Edwin Mellen Press, Lewiston, NY.
  • Moody, J. V., Francke, O. F. 1982. The ants (Hymenoptera, Formicidae) of western Texas, Part 1: Subfamily Myrmicinae. Grad. Stud. Tex. Tech Univ. 27: 1–80.
  • Wheeler, W. M. 1908h. The ants of Texas, New Mexico and Arizona. (Part I.). Bull. Am. Mus. Nat. Hist. 24: 399-485 (page 450, pl. 27, fig. 36 soldier, worker described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 582, fig. major, minor described)