Ricksecker's Water Scavenger Beetle
Scientific Name: Hydrochara rickseckeri
Status: Species of concern (Category 2)
Hydrochara rickseckeri is a small aquatic beetle known only from pond habitats scattered around the San Francisco Bay area, including Marin, Sonoma, Alameda, and Contra Costa counties. It is an unusual species whose closest apparent relative is known from eastern Asia. Historical collecting records indicate that populations of this species probably have long existed at low densities. An extensive survey conducted by Dr. John Hafernik (San Francisco State University) in 1988 was unsuccessful at locating any individuals of this species. Where and if any populations of Hydrochara rickseckeri still exist is unknown.
For further reading:
Hafernick, J.E., 1989. Surveys of potentially threatened bay area water beetles and the San Francisco forktail damselfly: Final report. Report to the U.S. Fish and Wildlife Service.