|The Ants of
Genus Crematogaster - Subgenus Decacrema
|Genus Crematogaster Introduction|
Subgenus Decacrema Forel (1910f: 9)
These can be divided into two distinct species groups.
Note: Blaimer, Bonnie B., 2010. Taxonomy and Natural History
of the Crematogaster (Decacrema)-group (Hymenoptera:
Formicidae) in Madagascar. Zootaxa,
2714, 1-39 (available on
line as free access).
She listed C. arthurimuelleri Forel, C. edentula Santschi, C. lango Weber, C. liengmei Forel (incl. 2 subspecies), C. petiolidens Forel and C. solenopsides Emery (incl. 3 subspecies) from Sub–Saharan Africa. and observed "The morphology of all but one examined African species further refutes a close relationship to the Decacrema of Madagascar (Blaimer, pers. observ.) and warrants further study".
Blaimer's key to Malagasy species separates into two groups; the first with the petiole with potero-lateral tubercles and paired coarse erect hairs on both petiole and postpetiole; the second without an angular petiole and usually with the erect hairs. My key predates hers but the same separation applied to African species matches my couplet 2 with her second group; and my couplet 3-onwards with her first group.
She listed liengmei
as among those she examined and my specimens show the similarity to the
Malagasy species she recognised. Further, it seems likely the true Decacrema are of second group,
which includes the genus type-species, C, schencki. Thus, at some future
point the first group of African species might merit placement in a
Key to species - workers
Crematogaster (Decacrema) species 563
Listed by Room (1971) from cocoa canopy and mistletoe at the
Mamfe-Mampong cocoa farm in Ghana. This may be the species
referred to but not named in any way by Strickland (1951a), as being
taken eight times in association with mealybugs on cocoa at CRIG. It is
possible that this is C. costeboriensis (see above).
© 2007, 2008, 2010, 2012, 2014, 2015 - Brian Taylor CBiol
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.