New Neotropical and Nearctic species of water beetles in the genera Hydraena Kugelann and Ochthebius Leach, a key to North American genera and subgenera of the family, new distribution records, and a synopsis of ecology, behavior and morphology related to aquatic life (Coleoptera: Hydraenidae) Author Perkins, Philip D. text Zootaxa 2023 2023-11-07 5367 1 1 86 https://www.mapress.com/zt/article/download/zootaxa.5367.1.1/52225 journal article 10.11646/zootaxa.5367.1.1 1175-5334 10145106 5A1E5321-D2BA-4B92-BA23-A7C1CDBA5723 Ochthebius ( Asiobates ) orbus Perkins Ochthebius orbus Perkins 1980: 382 The new record below documents a new collection record and a new depository for identified specimens of this very rarely collected species, which is presently known only from Marin County , California and Portland, Oregon . Only four specimens of this species are in museum collections . New record: U.S.A. : California , Marin Co. , Mt. Tamalpais St. Pk. , Redwood Creek , along Muir Woods Rd. , 2 mi. S. Muir Woods N.M., 27.iii.1986 , leg. C. B. Barr ( 1 female MCZ ) .