Calosoma (Castrida) leleuporum Basilewsky, 1968

Castrida leleuporum Basilewsky, 1968: 200 (type locality: Santa Cruz island, Cratéres du sommet 650m); holotype ♂ and paratype ♂ in Institut royal de Sciences naturelles de Belgique, Bruxelles

Length 17-21 mm. C. leleuporum seems to represent an intermediate step in the process of adaptation to the environment of the high ground terminal to the Galapagos islands, that means: atrophy of the wings that reach just half of the elytron and accentuation of the curvature of the shoulders.
Its body is ovoid, elongated. The species is easily distinguishes also by the blackish color with very weak greenish reflections, by its larger head and by the raised and regular sculpture of its elytra.
It has been only found in the wetlands of the island Santa Cruz above the 500 m. up to 800 m.

Examined specimens and literature’s data
Galápagos Archipelago (Ecuador). Santa Cruz, entre Cerro Biento et Pontudo 500m., Cratere du sommet 650m. (Basilewsky, 1968: 203), El Puntudo 800 m (AVT)

Notes: Rear wings reduced and not any longer functional; wing musculature completely absent. Predator on ground dwelling invertebrates, it lives in humid forest and pampa zones, especially numerous in Sphagnum bogs and humid grasslands. It is mostly nocturnal and it can be captured with pitfall traps. Active specimens were collected under stones at the beginnig of the more humid and warm season, between December and February. Other adult specimens, deeply buried into cells in the ground, were captured in April, uprooting small bushes (Basilewsky, 1968: 200), and Moret (1986:84) notes that in September he found remains only.
The species is named after the spouses Leleup. Narcisse Leleup, entomologist of the IRSAC led the Belgian zoological expedition to the Galapagos islands and Ecuador (1964 – 1965).

Calosoma (Castrida) leleuporum
Basilewsky, 1968
Ecuador, Galapagos is., Santa Cruz,
El Puntudo 800m, 19.1.89, Olmi lg. (coll Vigna Taglianti)
Calosoma (Castrida) leleuporum
Basilewsky, 1968
Basilewsky, 1968: 201
(dessin de Madame S. Berger)
updated April 23 2020