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Casey's June beetle : ウィキペディア英語版
Casey's June beetle

Casey's June beetle, ''Dinacoma caseyi'', is a beetle in the scarab family (Scarabaeidae). It is listed as an endangered species with approximately 587 acres (237 hectares) of land as critical habitat in Riverside County, California.
==Taxonomy==
The genus ''Dinacoma'' includes two described species, ''D. caseyi'' and ''D. marginata''. Delbert La Rue, a researcher experienced with the genus ''Dinacoma'' and a taxonomic expert stated, "''Dinacoma caseyi'' is a distinct species morphologically and comprises its own species group—the ''caseyi'' complex—the other (group ) being the ''marginata'' complex which includes the bulk/remainder of the genus". The Casey's June beetle was first collected in the city of Palm Springs, California, in 1916, and was later described by based on male specimens. This species measures 0.55 to 0.71 inches (in) (1.4 to 1.8 centimeters (cm)) long, with dusty brown or whitish coloring, and brown and cream longitudinal stripes on the elytra (wing covers and back).
In 2006, entomologists discovered two apparently new species or subspecies of ''Dinacoma'', collected respectively from near the city of Hemet, California, and in the northwest portion of Joshua Tree National Park, California, at Covington Flats. As of 2007, these specimens of ''Dinacoma'' have not been formally described in the scientific literature, but expert evaluation places them in the other ''Dinacoma'' species group (''marginata'' complex). stated that ''Dinacoma caseyi'' is the most morphologically divergent and distinct species in the genus. The new specimens collected from the Hemet area are paler than Casey’s June beetle specimens and possess morphologically different genitalia. Furthermore, the Little San Bernardino Mountains geographically isolate the new ''Dinacoma'' Joshua Tree population from all other known Dinacoma species.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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