The Ants of Africa
Genus Crematogaster
Crematogaster (Sphaerocrema) concava Emery

Crematogaster (Sphaerocrema) concava Emery

return to key {link to the Hymenoptera Name Server} Type location Zaïre (Crematogaster concava n. sp., Emery, 1899e: 480, queen & worker; Santschi, 1910c: 376, queen & male; type loc. Cameroun in Bolton, 1995) - see below

All forms described .

{Crematogaster concava}Emery's (1899e) description is at {original description}. He did not designate a type location but recorded specimens from Cameroun, Congo (Popocabacca, Kinshasa) and Sierra Leone. Santschi's (1910c) description of the male & queen is at {original description}, from Congo, Brazzaville, A Weiss.  Santschi stated his queen description was "non Emery, 1899" - giving the head as wider than long. As several Sphaerocrema species have queens with distinctive rectangular heads that are about 25% longer than wide and, as it appears neither Emery nor Santschi had definitely associated workers and queens, the question remains unsolved.

{Crematogaster concava}Karavaiev (1931d) gave an illustrated description of specimens from Naivasha, Kenya; this is at {original description}.

From the descriptions and images, it seems likely that Crematogaster (Sphaerocrema) lotti Weber (1943c), from the Lotti Forest, Imatong Mountains, Sudan, should be reduced to a junior synonym of concava.

Wheeler (1922) listed it from Cameroun, and both Congos; he gave an illustration (dorsal view) and commented on it as being found in twigs of Barteria fistulosa, the pronotal dorsum is distinctly concave, and the head near square in dorsal view. Forel (1915c) noted it as collected at St. Gabriel, Kisangani, Zaïre, on a tree, by Kohl. Later, Forel (1916) reported taken several times at St Gabriel in termite nests [not noted as terrestrial or arboreal] at the top of conical branches of the nests. Also sent to him by Prof. Wasmann.

Santschi (1935) noted a specimen from Luebo, Zaïre, collected by Dr Schouteden, 19.x.1920.

{Crematogaster concava}The photomontage of a worker from the type collection is collated from

Oxford University Museum specimens

Crematogaster (Sphaerocrema) concava
B Taylor det.
E Zassi

03°16'13.9" S
015°28'21.2" E
Gallery Forest; 24h pitfall trap 1
Crematogaster (Sphaerocrema) concava
B Taylor det.
A Fotso Kuate
Crematogaster sp11

Awae II
03°54'30" N
11°25'58" E
Tuna bait in fallow

{rematogaster concava}The photomontage is of a worker from Congo, Réserve de Lésio-Louna; collector Eric Zassi, 02-t-1-1 (Crematogaster sp3).

Crematogaster concava workerThe photomontage is of a worker from Cameroun, Awae II; collector A Fotso Kuate (fk sp 11).

© 2007, 2008, 2009, 2011, 2013, 2015 - Brian Taylor CBiol FIBiol FRES
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.