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J. Longino, 27 Oct 2021: The difference between this species and P. bruesi Wheeler needs to be evaluated. The differences cited by Wilson do not seem large enough without some evidence of sympatric forms. Pheidole bruesi is the senior name. Pheidole sagax is also very similar.
Pheidole laidlowi MannHNS, new status
Pheidole triconstricta var. laidlowi MannHNS 1916: 434.
Types Mus. Comp. Zoology Harvard.
Diagnosis A small, yellow, nearly hairless member of the diligensHNS group, similar to bruesiHNS, diligensHNS, inversaHNS, radoszkowskiiHNS, and triconstrictaHNS, differing by the following combination of traits.
Major: sculpture of dorsal surface of head entirely limited to longitudinal carinula restricted to part of head anterior to the posterior eye margin, with no rugoreticulum, and the frontal lobes bare; promesonotal profile strictly 2-lobed, with the lobes connected by a shallow, saddle-like concavity in dorsal-oblique view; propodeal spine very thin, needle-like; color pale yellow.
Minor: differing from that of the species just listed by its narrow occiput.
Measurements (mm) Lectotype major: HW 0.96, HL 0.98, SL 0.66, EL 0.14, PW 0.48.
Paralectotype minor: HW 0.48, HL 0.56, SL 0.66, EL 0.10, PW 0.34.
Color Major and minor: concolorous pale yellow.
Range Amazonian Brazil and Peru.
Figure Upper: lectotype, major. BRAZIL: Rio Madeira (W. M. Mann). Minor: Cuzco Amazonico, 15 km northeast of Puerto Maldonado, Madre de Dios, Peru (Stefan Cover and John E. Tobin). Scale bars = 1 mm.
Found most commonly in these habitats: 2 times found in rainforest, 2 times found in wet forest.
Found most commonly in these microhabitats: 1 times Nest in nut shell hanging in tree, 2 m above ground., 2 times ex sifted litter, rotten wood, 1 times Carton nest under palm frond, 1 m above ground..
Collected most commonly using these methods: 2 times search, 2 times Winkler.
Elevations: collected from 200 - 330 meters, 260 meters average
Collect Date Range: collected between 1989-06-21 00:00:00.0 and 2012-08-21 00:00:00.0