Crematogaster (Crematogaster) impressiceps Mayr
Type location Fernando Po
(Cremastogaster impressiceps nov. spec., Mayr, 1902: 294,
Bolton, 1995, who has type location as Equatorial Guinea) collector R.
Buchholz - see below
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 - no images on Antweb (December 2014)
lujana (Cremastogaster impressiceps Mayr v. lujana n. var., Forel, 1915c: 340,
worker) from Zaïre,
collected at Kondué, by
Luja - see http://www.antweb.org/specimenImages.do?code=casent0908535
worker and queen described .
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
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
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
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
Oxford University Museum
|Crematogaster (Crematogaster) impressiceps
B Taylor det.
G Debout & A Dalecky
|70 m from village;
flat terrain, nest in a tree
photomontage is of workers collected in Cameroun
- south-western tropical coastal forest area between Edéa and Campo;
McKey Wolbachia project (Cameroon 59).
These are dimorphic. The head and body with dense fine
longitudinal striations; the gaster is coriaceous and dull. The
mandibles are coarsely striated, with puncturation close to the apical
margin. Clypeus with fairly coarse striations. Head in full face view
square but impressed behind and with a distinct medial smooth line. Eye
flat and ovoid with a narrower lower apex. Antennal funiculus distinct
- segments 2-7 resembling slightly elongate beads, distinct club with
apical segment largest. Colour all over dark reddish-brown; antennal
club pale yellow to near white. Dense decumbent pilosity all over, some
fine erect hairs on anterior of head, pronotal angles and propodeum. In
profile alitrunk domed, highest on mesonotum which has a distinct
median carina, but in the form of a central line and not pronounced or
protruding as in Atopogyne. Propodeal spines fairly short,
acute and downturned at tips.
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
The photomontage is
collated from The Smithsonian
Institute cotype images at http://ripley.si.edu/ent/nmnhtypedb/public/specimeninfopage.cfm?publicconsumption=1&typespecimenID=791