Calosoma (Ctenosta) grandidieri Maindron, 1900

Length 25-35 mm. With bastardi, the other endemic species of Madagascar, grandidieri was put by Breuning (1928) in the subgenus Eucalosoma. A peculiarity of their chaetotaxy (presence of one seta on the metatrochanter) distinguishes them from other species of Ctenosta.
grandidieri is further characterized by the metatrochanter with an acuminate tip and by the bronzed color of the upper body.
It is found in the whole Madagascar

Examined specimens and literature’s data:
Madagascar. northern Madagascar (EM); pais Mahafaly (Breuning, 1927: 182); Antankara reg. (Breuning, 1927: 182); Toliara prov: Toliara (www.inaturalist.org), Berenty reserve (SB, TL), Onilayi River (type MNHN), Tsimananada (carabidae.org/); Androy (TL); Alaotra Mangoro: Ranomainty (RMCA); Atsimo-Atsinanana: Betioky (RMCA); Regione di Atsimo-Andrefana, Tsimanampetsotsa (carabidae.org/); Moramanga district: Amboasary (SB)

Notes: Winged. Active individuals were found during the hot rainig season, in December.
The species is named after Alfred Grandidier (1836 –1921) a French naturalist and explorer, who visited several times Madagascar studying in depth its geography and nature.

Calosoma (Ctenosta) grandidieri ♂ Maindron, 1900 Southern Madagascar, Berenty reserve, XII.89

Calosoma (Ctenosta) grandidieri ♀ Maindron, 1900 Southern Madagascar, Berenty reserve, XII.89