Tetramorium cristatum Stitz
Type location Togo (Tetramorium
guineense F. v. cristatum n.v., Stitz, 1910: 144, worker;
raised to species by Bolton, 1980) collected at Bismarckburg, by L.
Conradt - no images on Antweb (April 2015)
junior synonym medje (Tetramorium
guineense (Fabricius) subspecies medje
new subspecies, Wheeler,
1922: 192) from Zaïre, Medje, by Lang & Chapin, from
stomach of a toad - no images on Antweb (April 2015)
unavailable name ebangense (T.
guinense F. stirps cristatum
Stitz v. ebangense n. v., Santschi, 1937d:
235, illustrated, worker) from Angola, Ebanga - see below
(see Bolton, 1995);
worker only described .
- TL 4.1-5.1 mm; distinctively coloured, with head, alitrunk and
pedicel orange-yellow to glossy orange-brown, gaster always much
darker, dark brown to blackish brown (Bolton, 1980: 268, illustrated).
Wheeler (1922) listed it twice as cristatum and,
wrongly, as striatum (from Zimbabwe, reflecting an error by
Findings listed by Bolton (1980) include Ivory Coast,
at Sipilou (J. Lévieux); Ghana, at Legon (D. Leston);
Guinea, Mt. Nimba, Thio (Lamotte); plus Uganda, Buwalasi Forest (J C
Bradley); South Sudan, Imatomg
Mts., N A Weber; Zaïre, Lubelu, E S Ross & R E Leech. The
locations suggest it is a savannah species.
The Guinea findings were recorded by Bernard
(1952) as, although not identical, being Tetramorium guineense
Fabricius, similar to the congolese forms ssp. medje, 1 worker
from savanna at Kéoulenta, and ssp. cristatum, one worker from
Thio. The latter he noted as TL 4.3 mm, near the maximum known for "T.
guineense" and with a head more rounded and the petiole more
angular. The distribution he gave as tropicopolitan, very variable and
rare here. In terms of nomenclature, the name Tetramorium
guineense now applies to a synonymization of a Xiphomyrmex
species (also collected at Mt. Nimba, and recorded by Bernard). The Tetramorium
guineense of Fabricius (as Formica guineensis, 1793;
transferred to Tetramorium by Mayr (1862) is now regarded as Pheidole