Bembidion palosverdes Kavanaugh & Erwin, 1992:312
Palos Verdes intertidal minute carabid beetle
Taxonomy & Nomenclature
"we resurrect the subgenus Lymneops Casey to accommodate B. palosverdes and B. laticeps"
(Maddison & Maruyama, 2019)
"This species was transferred from the subgenus Cillenus Samouelle, 1819 to the subgenus Lymneops Casey, 1918 by Maddison & Maruyama (2019)."
(Gimmel et al., 2023)
Last record: June 1964
Rediscovered in 2010 (Caterino et al., 2015)
The Palos Verdes intertidal minute carabid beetle (Bembidion palosverdes) was described by (Kavanaugh & Erwin, 1992) based upon 6 specimens (4 males; 2 females) collected in 1964 from the Palos Verdes Peninsula. The species had not been collected since, and they hypothesised that oil spills caused the species' extinction. However, it was rediscovered in 2010 on Santa Catalina in the Channel Islands (Caterino et al., 2015; Maddison & Maruyama, 2019). The original Palos Verdes Peninsula population is thought to have been lost (Caterino et al., 2015; Gimmel et al., 2023).
Palos Verdes Peninsula (probably extinct) & Channel Islands (Santa Catalina), both Los Angeles County, California, USA
Biology & Ecology
Original scientific description:
Kavanaugh, David H. and Erwin, Terry L. (1992). Extinct or extant? A new species of intertidal Bembidiine (Coleoptera: Carabidae: Bembidiini) from the Palos Verdes Peninsula, California. The Coleopterists Bulletin 46(3): 311-320.
Bousquet, Yves. (2012). Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico. ZooKeys 245: 1-1722. https://doi.org/10.3897/zookeys.245.3416
Carlton, James T. (2023). Marine Invertebrate Neoextinctions: An Update and Call for Inventories of Globally Missing Species. Diversity 15(6): 782. https://doi.org/10.3390/d15060782
Caterino, Michael S., Caterino, Katie J. and Maddison, David R. (2015). Extant! Living Bembidion palosverdes Kavanaugh and Erwin (Coleoptera: Carabidae) Found on Santa Catalina Island, California. The Coleopterists Bulletin 69(3): 410-411.
Gimmel, M. L., Johnston, M. A. and Caterino, M. S. (2023). Annotated checklist of the beetles (Coleoptera) of the California Channel Islands. PeerJ 11: e14793. https://doi.org/10.7717/peerj.14793
Maddison, David R. and Maruyama, Munetoshi. (2019). Phylogenetic relationships and convergent evolution of ocean-shore ground beetles (Coleoptera: Carabidae: Trechinae: Bembidion and relatives). Systematic Entomology 44(1): 39-60. https://doi.org/10.1111/syen.12307