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Pheidole crassicornis Emery

Pheidole crassicornis, full face view of a major worker
(click images to enlarge).
Pheidole crassicornis, lateral view of major worker (Baldwin Co., AL) (photo by Joe A. MacGown)  

Pheidole crassicornis is a fairly large soil dwelling species. Species in this species group have scapes flattened at the basally in the majors. This species can be distinguished from others in the group in this region by the lack, or scarcity, of erect hairs on the gaster, petiole and postpetiole, promesonotum, and head of the major.

Taxonomic History (from Bolton, 2014)

Minor Worker: (from MEM specimens). HL 0.67–0.73, HW 0.53–0.62, SL 0.82–0.93, EL 0.16–0.18, \

Major Worker: (from MEM specimens). HL 1.62–1.84, HW 1.56–1.72, SL 0.92–1.00, EL 0.20–0.25, IHT 0.38–0.44, OHT 0.57–0.65, MeSL 1.47–1.62, PRW 0.86–0.96, PSL 0.08–0.12, PTW 0.24–0.32, PPW 0.34–0.47 (n=6). \

Queen: (from MEM specimens). HL 1.36–1.42, HW 1.58–1.64, SL 0.98–1.00, EL 0.32–0.40, MeOL (median ocellar length) 0.15–0.16, IHT 0.46–0.49, OHT 0.63–0.65, MeSL 2.53–2.55, PRW 1.30–1.60 PSL 0.12–0.15, PTW 0.53–0.55, PPW 0.75–0.80, WL 7.40–7.80 (n=4). \


Biology and Economic Importance


US Distribution: Alabama, Florida, Georgia, Louisiana, Mississippi, and Texas.

Literature Cited


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