Crematogaster (Crematogaster) impressiceps Mayr
  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 http://www.antweb.org/specimenImages.do?code=casent0912685
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  .
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Mayr's (1902) description is at  . Stitz's (1916) description of longiscapa
is at  .
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.
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 The
photomontage of a syntype worker is
collated from http://www.antweb.org/specimen.do?name=casent0902094
From the fresh specimens (below) this appears to be a
minor worker.
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 The
photomontage of a lujana
syntype worker is
collated from http://www.antweb.org/specimen.do?name=casent0908535
The greater size but little other difference suggests this is tha major
worker.
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 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 http://mcz-28168.oeb.harvard.edu/mcz/FMPro?-DB=Image.fm&-Lay=web&-Format=images.htm&Species_ID=9242&-Find
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 The photomontage is
collated from The Smithsonian
Institute cotype images at http://ripley.si.edu/ent/nmnhtypedb/public/specimeninfopage.cfm?publicconsumption=1&typespecimenID=791
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