The Ants of Africa
Genus Crematogaster
Crematogaster (Crematogaster) impressiceps Mayr

Crematogaster (Crematogaster) impressiceps Mayr

return to key {link to the Hymenoptera Name Server} Type location Fernando Po (Cremastogaster impressiceps nov. spec., Mayr, 1902: 294, worker; see Bolton, 1995, who has type location as Equatorial Guinea) collector R. Buchholz - see below
junior synonyms (here)
frontalis (Crematogaster impressiceps variety frontalis Santschi, new variety, Santschi in Wheeler, 1922: 154, worker, see below) from Zaïre - see
longiscapa (Cremastogaster impressiceps Mayr v. longiscapa n. v., Stitz, 1916: 384, worker) from Zaïre, at Duma, by Schubotz - Focol images on Antweb
lujana (Cremastogaster impressiceps Mayr v. lujana n. var., Forel, 1915c: 340, worker) from Zaïre, collected at Kondué, by Luja - see below
worker and queen described .

Mayr's (1902) description is at {original description}. Stitz's (1916) description of longiscapa is at {original description}.

Mayr (1902) gave the colour as dark brown, the scape and legs brown, the mandibles red-yellow, ends of funiculus and tarsi brownish-yellow.

Forel (1915c) described lujana as -
WORKER - TL 3.6-4 mm; larger than type. Subopaque; sculpture stronger, with longitudinal striae more distinct and specially with stronger more abundant puncturation. Longitudinal impression on vertex also longer, extending into postclypeal notch. Head more strongly scalloped and wider posteriorly. Alitrunk as in type; postpetiole notch slightly more feeble and petiole wider slightly less narrowed posteriorly. From Kasai, Kondué, Zaïre, by Luja.

Wheeler (1922) also listed it from Cameroun (at Abo, by R. Buchholz) and Congo locations. he gave the following information -
Panga and Faradje, S (Lang and Chapin). The specimens from Panga were found inhabiting the hollow twigs of Barteria fistulosa (Bequaert, 1922, p 438-9), those from Faradje were associated with aphids.

{Crematogaster impressiceps} The photomontage of a syntype worker is collated from

From the fresh specimens (below) this appears to be a minor worker.

{Crematogaster impressiceps lujana} The photomontage of a lujana syntype worker is collated from
The greater size but little other difference suggests this is tha major worker.

{Crematogaster impressiceps frontalis} Crematogaster impressiceps variety frontalis Santschi, new variety.
WORKER - Length 3 to 3.5 mm. Pale brown; thorax less sculptured than in the typical impressiceps. Frontal groove deeply impressed. Stature less variable and smaller than in the typical form of the species and larger than in the variety longiscapa Stitz, but the scape also extends beyond the occiput as in that variety." (Santschi). Numerous specimens from Malela (type locality) and Kunga (Lang, Chapin, and J. Bequaert); those at Kunga found nesting in the hollow internodes of the myrmecophyte Cuviera, species (Bequaert, 1922, p 492); the specimens from Malela "living in a small carton nest, about 9 cm. long, fixed upon a stalk of Raphia."
The photomontage is collated from

{Crematogaster impressiceps}The photomontage is collated from The Smithsonian Institute cotype images at

© 2007, 2008, 2009, 2012, 2014, 2016 - Brian Taylor CBiol FRSB FRES
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