Pheidole diversipilosa

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

Pheidole diversipilosa casent0102874 profile 1.jpg

Pheidole diversipilosa casent0102874 dorsal 1.jpg

Specimen Label

According to Stefan Cover (personal communication), diversipilosa is common at mid-elevations (1050–1900 m), favoring oak-pine-juniper forests, especially those in creek valleys, where it nests under rocks and in open soil. Colonies have single queens and large populations, which can exceed 1000 workers. Seed caches have been found in some nests. (Wilson 2003)

Identification

The majors of this species are easily recognized by the short (less than 0.05 mm), erect hairs on the dorsum of the gaster. The scape of the major is flattened near the base, but the width is less than the width of the scape near the apex. The scape extends slightly more than ½ the distance to the posterior lateral corner. The anterior half of the head has coarse, reticulated rugae, the posterior half of the head, and the tops of the posterior lateral lobes, are smooth and glossy. The posterior half of the mesonotum is enlarged and swollen, the propodeal spines are well developed, but thick. The lateral connules on the postpetiole are absent. The minor worker has most surfaces punctate, with shining areas in the middle of the head, dorsum and side of the pronotum, and the gaster. (Mackay and Mackay 2002)

Also see the description in the nomenclature section.

Keys including this Species

Distribution

Southwestern Texas to the mountains of southern and central Arizona. (Wilson 2003)

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).
Neotropical Region: Mexico.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Habitat

Oak forests, alligator juniper, Chihuahua pine forests. (Mackay and Mackay 2002)

Biology

Brood is found in nests in April, sex-uals in June. Nests appear to be mo-nogynous, even though the nests are very large. Foragers are attracted to tuna baits. (Mackay and Mackay 2002)

Castes

Worker

Minor

Major

Nomenclature

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

  • diversipilosa. Pheidole crassicornis var. diversipilosa Wheeler, W.M. 1908e: 467 (s.w.q.) U.S.A. Junior synonym of crassicornis: Creighton, 1950a: 175; Gregg, 1959: 20. Revived from synonymy and raised to species: Naves, 1985: 61. See also: Wilson, 2003: 153.

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): Very close to Pheidole crassicornis from which it differs in the major by abundant pilosity on the mesosoma and gaster, and Pheidole tetra, from which it differs in the major by the much shorter pilosity on the first gastral tergite and by sparseness or absence of pilosity on the waist and occiput.

Also resembles Pheidole pilosior and Pheidole porcula in various traits as depicted.

MEASUREMENTS (mm) Lectotype major: HW 1.26, HL 1.34, SL 0.66, EL 0.20, PW 0.66. Paralectotype minor: HW 0.66, HL 0.74, SL 0.76, EL 0.16, PW 0.46.

COLOR Major and minor: body medium reddish brown, appendages light reddish brown.


Pheidole diversipilosa Wilson 2003.jpg

Figure. Upper: lectotype, major. Lower: paralectotype, minor. Scale bars = 1 mm.

Syntype Specimen Labels

Type Material

TEXAS: Ft. Davis, southwestern Texas, col. W. M. Wheeler., Museum of Comparative Zoology - as reported in Wilson (2003)

Etymology

L diversipilosa, different (variable) hair, alluding to the major. (Wilson 2003)

References

  • Creighton, W. S. 1950a. The ants of North America. Bull. Mus. Comp. Zool. 104: 1-585 (page 175, Junior synonym of crassicornis)
  • Gregg, R. E. 1959 [1958]. Key to the species of Pheidole (Hymenoptera: Formicidae) in the United States. J. N. Y. Entomol. Soc. 66: 7-48 (page 20, Junior synonym of crassicornis)
  • Mackay, W. P. and E. Mackay. 2002. The ants of New Mexico (Hymenoptera: Formicidae). Edwin Mellen Press, Lewiston, NY.
  • Naves, M. A. 1985. A monograph of the genus Pheidole in Florida, USA (Hymenoptera: Formicidae). Insecta Mundi 1: 53-90 (page 61, Revived from synonymy, and raised to species)
  • Wheeler, W. M. 1908h. The ants of Texas, New Mexico and Arizona. (Part I.). Bull. Am. Mus. Nat. Hist. 24: 399-485 (page 467, soldier, worker, queen described)
  • Wilson, E. O. 2003. Pheidole in the New World: A dominant, hyperdiverse ant genus. Harvard University Press, Cambridge, MA. (page 153, fig. see also)