Crematogaster (Orthocrema) muralti Forel
Type location Cameroun
(Cremastogaster Muralti, n. sp., Forel, 1910e: 432, worker) L V
worker only described (see Bolton, 1995) .
NOTE - I have elevated the smaller, dark brown to
form regarded as subspecies ugandensis (Santschi, 1914b: 99,
worker) from Uganda, with variety livingstonei
(Santschi, 1919a: 344, worker) from Zambia, to species status -
Crematogaster (Orthocrema) species 1 - Nigeria
specimens (Taylor, 1979: 21). WORKER. TL 2.18 mm, HL 0.61, HW 0.59, SL
0.39, PW 0.34
Colour dark orange, very dark on the gaster. Moderately abundant
pilosity. Erect hairs clavate, this is especially noticeable on the
pedicel. Alitrunk profile a nearly continuous convex curve, with only a
slight depression at the metanotal groove. The propodeal spines are
short, triangular, upturned denticles. The subpetiolar spine is
moderately long and triangular.
The presence of a subpetiolar spine confounds the key of
Bolton (unpublished, 1969) to CRIN species; the clavate hairs, however,
Nests under bark, in dead branch ends and in mummified
pods. In Nigeria, it was not infrequently found on cocoa, on up
to 1% of trees, often in association with Oecophylla longinoda,
and foraging over a surprisingly wide area of canopy (Taylor, 1977). It
constructs discrete tents of vegetable debris over Pseudococcids at the
pod-stalk junction, the tents have been found to be sources of cocoa
black pod disease. Also found on native shrubs and trees, and on kola.
Possibly the same (unnamed) species was mentioned by
Strickland (1951a) from Ghana and Togo. He described
it as being rare and of minor importance, but it was found also on
several other shrubs and trees.