Calosoma (Orinodromus) kenyense Breuning, 1928

Calosoma (Carabomorphus) brachycerum kenyense Breuning, 1928: 93 (type locality: Mt Elgon, 4000m); holotype ♀ in Naturalis Biodiversity Centre, Leiden (de Boer, 202: 63)
Carabomorphus (Carabomorphus) brachycerus kenyensis Lapouge, 1932: 396
Orinodromus (Elgonites) kenyensis Jeannel, 1940: 146

Length 15-20 mm. Two species (or perhaps two forms of the same species) are found on Mount Elgon: C. elgonense and C. kenyense. Both of them are characterized by well developed rear lobes of the pronotum which, unlike the other species of the Orinodromus group, are devoid of setae. Basing on these characteristics, for them Jeannel (1940) created the subgenus Elgonites.
C. kenyense differs from C. elgonense, because of its on average larger size, the transverse pronotum, regularly rounded up to the base, while is narrower in C. elgonense. Also, and this is the most easily recognizable characteristic, the elytra have 15 intervals of the same width and heigth, that means of triploid homodynamic type.These intervals are raised and are distinctly separated by striae.
However Jeannel (1940:146), given that C. kenyense and C. elgonense have almost identical edeagi and might be cohabiting, has expressed doubts as to whether consider them distinct species or simple individual variations within the same species.
C. kenyense up to now has been only found on the eastern side of Mount Elgon.

Examined specimens
Kenya. mt. Elgon eastern slopes, 3000-3500 m (AMNH, AVT, MNHN, RMCA, NMB)

Notes: C. kenyense, as the other representatives of the subgenus Orinodromus, is wingless. As it happens with C. elgonense, C. kenyense is found in the alpine meadows of Mount Elgon around 3000-3500m. However, unlike its congener that arrives up to 4200m, rarely specimens of C. kenyense have been found above 3500m. There are scarce data on its phenology: some specimens were found to be active in December to February (holotype), at the end of the wet season and one specimen was found already dead under dried dung in July.

Calosoma (Orinodromus) kenyense
Breuning, 1928
Elgon vers. Est 3100 (praire subalpine) 7.XII.1953 NN Leleup (IRSAC Mus. Congo)
(American Museum of Natural History, New York)
Calosoma (Orinodromus) kenyense
Breuning, 1928
Kenya, mt. Elgon Eastern slopes, 3000-3500m.,
7.VII.1991, A. Vigna leg.(coll A. Vigna)

Calosoma (Orinodromus) kenyense
Breuning, 1928
Kenya, camp III de l'Elgon, zone de bruyeres est 3500m.,
Mission de l'Omo, Chappuis et Jeannel
(Muséum National d'Histoire Naturelle, Paris)
Calosoma (Orinodromus) kenyense
Breuning, 1928
Elgon vers. Est 3100 (praire subalpine) 7.XII.1953
NN Leleup (IRSAC Mus. Congo)
(Musée Royal de l'Afrique Central, Tervuren)

last review april. 18 2019

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