Stigmatomma pluto (Gotwald & Lévieux)
Type location Ivory Coast
(Amblyopone pluto n. sp.,
Gotwald & Lévieux, 1972: 384; genus status revised, Yoshimura &
Fisher, 2012) type-nest (J. Lévieux, 16.viii.1965)
and four other samples all from Lamto; one colony had distinctly
smaller individuals; all forms described. Listed in Hölldobler &
Wilson (1990, page 559) .
Gotwald & Levieux's (1972) description is at .
- TL 5.66-6.38 mm; head only slightly longer than broad, not broadened
anteriorly; mandibles less linear than usual for the genus; clypeus
concave medially, descending sharply from area between frontal lobes
and bearing a row (9-11) of conspicuous elongate tubercles; head and
alitrunk black to dark reddish-brown; antennae, genae, clypeus and
frontal carinae of head and ventrolateral alitrunk often lighter;
petiole sometimes black dorsally; gaster dark brown to reddish-orange
(Gotwald & Lévieux, 1972: 384, fully illustrated, all forms).
Quite detailed investigations were made by Gotwald &
Lévieux (1972). Its distribution seems to be limited to unburnt areas
of the humid savannah, and it is not found in the forest. Nests were
some 15 cm down in the ground, in black clay soil with thick litter
cover, with a colony size of some 30-40 adults. Extensive feeding
experiments showed that the only food source was species of Chilopoda
(geophilomorph centipedes), these appeared to be attacked only when
alive. In starvation conditions cannibalism of larvae was found.