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 [species group] being the marginata complex which includes the bulk/remainder of the genus".
This article incorporates public domain material from the United States Fish and Wildlife Service document "Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition To List the Casey’s June Beetle (Dinacoma caseyi) as Endangered With Critical Habitat".
- Blaisdell, F.E. (1930), "Revision of the genus and species of Dinacoma with description of a new species (Coleoptera: Scarabaeidae)", Pan-Pacific Entomologist, 6: 171–177
- Fish and Wildlife Service (5 July 2007), "Endangered and Threatened Wildlife and Plants; 12-Month Finding on a Petition To List the Casey’s June Beetle (Dinacoma caseyi) as Endangered With Critical Habitat", Federal Register, 72 (128): 36635–36646, 72 FR 36635
- La Rue, Delbert (13 June 2006), Electronic mail communication to Alison Anderson, Entomologist, Carlsbad Fish and Wildlife Office, Carlsbad, CA. Cited in Fish and Wildlife Service (2007)
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