Pheidole williamsi Wheeler

Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA, USA: Harvard University Press : 249

publication ID

20017

DOI

https://doi.org/10.5281/zenodo.6275844

persistent identifier

https://treatment.plazi.org/id/5761CCB0-8527-9D55-8A44-3EBF60DF958C

treatment provided by

Donat

scientific name

Pheidole williamsi Wheeler
status

 

Pheidole williamsi Wheeler View in CoL   HNS

Pheidole williamsi Wheeler   HNS 1919d: 267. Syn.: Pheidole williamsi var. seymourensis Wheeler   HNS 1924b: 108, n. syn. types Mus. Comp. Zool. Harvard.

Etymology Named after Harrison Williams, leader of a Galapagos collecting expedition.

diagnosis A small, yellow member of the diligens   HNS group, closest to crozieri   HNS of Peru, but also with some similarities to vafella   HNS , as well as rufipilis   HNS and the mostly South American species listed with rufipilis   HNS (q.v.), differing from crozieri   HNS as follows.

Major: dark yellow; pronotum in side view peaked in a blunt angular profile, and weakly bilobous in dorsal-oblique view; occiput weakly concave; anterior margin of pronotal dorsum carinulate; apex of petiolar node in side view tapering to a blunt point.

Minor: petiolar node in side view relatively low, and in rear view with dorsal border strongly convex.

Measurements (mm) Lectotype major: HW 1.04, HL 1.10, SL 0.74, EL 0.16, PW 0.52.

Paralectotype minor: HW 0.48 (approximately), HL 0.62, SL 0.66, EL 0.12, PW 0.30.

color Major: concolorous dark yellow.

Minor: body brownish yellow, appendages dark to medium yellow.

The Wheeler types may be faded; minors collected on Isla San Salvador in 1991 (P. Oromi) have light brown bodies.

range Known only from Isla Santa Cruz, Isla Seymour, and Isla San Salvador. An apparent endemic of the Galapagos Islands. The species appears to be rare.

Biology Males were collected with the lectotype series in November 1905.

Figure Upper: lectotype, major. Lower: paralectotype, minor. GALAPAGOS ISLANDS: Isla Santa Cruz. Scale bars = 1 mm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Pheidole

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