Calosoma (Orinodromus) deckeni (Gerstaeker, 1867)

Carabus Deckeni Gerstaeker, 1867: 10 (type: Kilimandjaro; Museum für Naturkunde Humboldt Universität, Berlin)
Trachycarabus Deckeni Géhin, 1885: 53
Orinodromus Deckeni var nigripennis Kolbe, 1895: 64
Orinodromus gerstaekeri Kolbe, 1895: 64
Orinodromus gerstaekeri var. Alluaudi Kolbe, 1905: 593 note 62
Orinodromus gerstaekeri var. Alluaudae Alluaud, 1908: 24
Calosoma (Carabomorphus) deckeni Breuning, 1928: 137
Carabomorphus (Orinodromus) deckeni Lapouge, 1932: 397
Orinodromus Deckeni Jeannel, 1940: 148

Length 12-18 mm. Three species, divided by altitudinal belts and exposure of the slopes, are found on Mount Kilimanjaro: deckeni, glaciale and volkensi. All have the rear lobes of pronotum, small but well developed, and provided with setae. Basing on these characteristics, Jeannel (1940) distinguished these species, placing them, together with another species of northern Tanzania, in the subgenus Orinodromus s. str.
Furthermore, deckeni has a pronotum of reddish yellow colour, elytra with striae just visible or smooth, of black to brown to yellow colour. In the larger specimens, the sculpture may be deeper and the primary intervals may be slightly segmented in tubercles. The inner armature of their penis has a ligule with an unmistakable apex bifurcate.
It seems located in the south eastern slopes of Kilimanjaro, from Bismarck Hut (now Mandara Hut) up to the base of the cone of Mawenzi, (between 2500 and 3200 m).

Examined specimens
Tanzania. Kilimanjaro (NMB); Kilimanjaro, Bismark (Mandara) hut, 2600-2800 (EM, MNHN, RMCA, SB), Kilimanjaro, 8900 ft, South side near Bismark (Mandara) hut (sub Orinodromus Deckeni nigripennis Kolbe, RMCA)

Notes: Wingless. Live at the upper limit of the forest, on alpine meadows, at the foot of tufts of grass. Catches are reported from January to April, in June and in October (Basilewsky, 1962: 69).
The species is named after Baron Karl Klaus (Carl Claus) von der Decken (1833 - 1865) a German explorer of eastern Africa and the first European to attempt to climb Mount Kilimanjaro in two expeditions in 1861 and 1862.

Calosoma (Orinodromus) deckeni
(Gerstaeker, 1867)
Tanzania: (Afrique or. allemande), Kilimandjaro, versant Sud Est, Alluaud & Jeannel; prairies alpines, Bismarck Hugel, 2600-2800, Mars-Avril 1912
Calosoma (Orinodromus) deckeni
(Gerstaeker, 1867)
Tanzania: (Afrique or. allemande), Kilimandjaro, versant Sud Est, Alluaud & Jeannel; prairies alpines, Bismarck Hugel, 2600-2800, Mars-Avril 1912
Calosoma (Orinodromus) deckeni
(Gerstaeker, 1867)
Kilimandjaro, Kaien 1908
(coll. Naturhistorischen Museums Basel)


Calosoma (Orinodromus) deckeni
(Gerstaeker, 1867)
Kilimanjaro, 8900 ft, 23.X.1948, G Salt
South side near Bismark hut
(sub deckeni nigripennis)
(coll. Musée Royal de l'Afrique Central, Tervuren)

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