Optioservus ovalis explained

Optioservus ovalis is a species of riffle beetle in the family Elmidae. It is found in North America.

Further reading

• New species of North American Coleoptera, pt. I. 1863. LeConte . J. L.. Smithsonian Miscellaneous Collections. 6. 1–86.
• A revision of the Nearctic Optioservus (Coleoptera: Elmidae), with descriptions of new species. 1978. White . D. S.. Systematic Entomology. 3. 1. 59–74. 10.1111/j.1365-3113.1978.tb00390.x.
• Web site: 2019-07-02. World Elmidae. 2019. Čiampor . Fedor Jr. Čiamporová-Zaťovičová . Zuzana. Slovak Academy of Sciences.
• Book: Catalogue of Palaearctic Coleoptera, Volume 3: Scarabaeoidea - Scirtoidea - Dascilloidea - Buprestoidea - Byrrhoidea. 2006. Lobl . I.. Smetana . A.. Apollo Books. 978-90-04-30914-2.