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types Mus. Comp. Zool. Harvard.
measurements (mm) Lectotype queen: HW 0.46, HL 0.48, SL 0.40, EL 0.20, PW 0.36. color Concolorous light reddish brown, appendages yellowish brown.
range Known only from the type locality.
biology P. microgynaHNS appears to be a social parasite of Pheidole minutulaHNS. The latter species is abundant in the Amazonian and Guianan rainforests of South America, where it nests in the swollen leaf bases of the melastome understory shrub Maieta guianensis. In an earlier analysis (Wilson 1984b), I pointed out that microg)>na may have its own workers, which are anatomically somewhat different from those of minutulaHNS, or workers identifiable as minutulaHNS. This circumstance suggests that microgynaHNS is a temporary social parasite of minutulaHNS or some related free-living species. The small size of the microgynaHNS queens also suggests such a life cycle. However, the status of this unusual form will not be solved until additional collections are made, preferably with field observations, allowing the taxonomy of the minutulaHNS complex to be more fully clarified.
Figure Lectotype, queen. GUYANA: Kartabo.