Calosoma (Callitropa) palmeri Horn, 1876
Calosoma palmeri Horn, 1876: 199 (type: Guad(alupe) Is(land); Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts, USA)
Calosoma (Paracalosoma) palmeri Breuning, 1928: 121
Callisthenes (Paracalosoma) palmeri Lapouge, 1932: 383
Callitropa (Paracalosoma) palmeri Jeannel, 1940: 215
Calosoma (Paracalosoma) palmeri Gidaspow, 1959: 276
Calosoma (Callitropa) palmeri Erwin, 2007: 99
Length 18-22 mm. palmeri is a small, brachipterous species, entirely shiny black, for which Breuning (1927) had created the subgenus Paracalosoma. It has a posteriorly narrowed pronotum, oval elytra, widened at the rear, with very superficial striae.
It is found only on Isla Guadalupe, a large island that belongs to the Baixa California, about 270 km from the coast, but Erwin (2007: 99) reported a single capture on an island of the San Benito archipelago, much more close to the coast.
Examined specimens
Mexico. Baja California: Guadalupe (AMNH, MNHN, NMB); Guadalupe, summit of the island 2500ft (AMNH)
Notes: Brachypterous. Lives on lowland and midlands up to the very summit of island at 1250m. Adult active individuals have been found in January and March (Erwin, 2007: 99).
The species is named after Edward Palmer (1829–1911), a self-taught botanist and archaeologist. Palmer, British-born but soon emigrated to America, collected natural specimens in the southwestern United States, Florida, Mexico (including Baja California), and South America, for the Smithsonian and many other Institutions.
![]() Horn, 1876 Mexico Guad(alupe) Is(land) (Typus) (coll. and photo: Museum of Comparative Zoology, Harvard University, Cambridge, Massachusetts, USA) |
![]() Horn, 1876 California, Is. Guadalupe (coll. Naturhistorischen Museum Basel) |
![]() Horn, 1876 Guadalupe, summit 2500ft, 2.III.1911 (coll. American Museum of Natural History, New York) |
![]() Horn, 1876 Southern California, Guadalupe (coll. American Museum of Natural History, New York) |