Calosoma (Ctenosta) strandi Breuning, 1934

Calosoma (Ctenosta) Strandi Breuning, 1934: 38; holotype ♂ from Masaua (Massawa) and paratype ♀ from Aden in Naturalis Biodiversity Centre, Leiden (de Boer, 2002: 109)
Ctenosta Strandi Jeannel, 1940: 130

Length 26-30 mm. The sculpture of the elytra in this species, as in C. planicolle and C. senegalense, is characterized by intervals deeply incised and that have different width and heigth (heterodynamic sculpture of Jeannel). But in C. strandi, both the secondary and tertiary intervals are more elevated and larger than the primary ones.
C. strandi can also be distinguished at first glance by the dark bronze color of the upper body where the primary intervals are lively bronze. The metatrochanter have a rounded tip in both sexes.
C. strandi has been described on one specimen from the Eritrean coast and on another one from the coast of Yemen ("flown aboard a ship not far from Aden"), which, among other things, had previously attracted the attention of Roeschke (1900a: 72), although still without a name. The species is therefore certainly present along the southern shores of the Red Sea and of the Gulf of Aden, and it could be found, possibly as a casual visitor, in the opposites shores of Yemen. From the Gulf of Aden, it reappears along the Somali coast of the Indian Ocean as well as in Southern Ethiopia, up to Eastern Kenya.

Examined specimens and literature’s data
Eritrea. Massawa (type; NBC)
Ethiopia. Ogaden, Kebri Dehar (= Gabredarre) (Jeannel, 1940:130), Oromia region, Arero forest (SB)
Yemen. Aden (paratype; NBC)
Kenya. North Eastern Province: El Wak (SB); Wajir (RMCA, TL); Eastern Province: Mwingi (SB), Marsabit to South Horq (Häckel et al, 2016: 18); Tana River Province: Bura (SB), Coast Province, Voi (SB)
Somalia. Bai (Baidoa) (SB); Benadir, Afgoi (AVT, EM), Balad (EM); Dolo (Straneo 1942: 62; RMCA)

Notes: Winged, attracted by light at night. The specimens examined were mostly caught in the rainy periods, ie April-May and November-December.
The species is named in honor of Embrik Strand (1876 -1947) Norwegian entomologist and arachnologist, founder of Folia Zoological and Hydrobiologica.

Calosoma (Ctenosta) strandi
Breuning, 1934
Somalia: Benadir, Afgoi, III-IV.1977
Calosoma (Ctenosta) strandi
Breuning, 1934
Somalia: Baidoa, IV.77

updated April 18 2024