Onthophagus nigriventris

• Arnett, R.H. Jr.; Thomas, M. C.; Skelley, P. E.; Frank, J. H., eds. (2002). American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea. CRC Press. ISBN 978-0849309540.
• Hardy, A. (1991). A catalog of the Coleoptera of America North of Mexico: Family Scarabaeidae, Subfamilies Rutelinae and Dynastinae (PDF). USDA Agriculture Handbook.
• LeConte, J.L. (1861). Classification of the Coleoptera of North America. Smithsonian Miscellaneous Collections. Vol. 3. Smithsonian Institution. doi:10.5962/bhl.title.38459. ISBN 0665100558.
• Riley, Edward G.; Wolfe, Charles S. (2003). "An annotated checklist of the Scarabaeoidea of Texas" (PDF). Southwestern Entomologist, Supplement.
• White, Richard E. (1998) [1983]. A Field Guide to the Beetles of North America (Peterson Field Guides). Houghton Mifflin Harcourt. ISBN 0395910897.

• Ratcliffe, Brett; Jameson, Mary Liz. "Generic Guide to New World Scarab Beetles". Archived from the original on 2019-03-30. Retrieved 2018-03-06.

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