RESEARCH ARTICLE A New Species of the Bay Goby Genus Eucyclogobius, Endemic to Southern California: Evolution, Conservation, and Decline Camm C. Swift1¤, Brenton Spies2, Ryan A. Ellingson2,3, David K. Jacobs2* 1 Emeritus, Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, California 90007, United States of America, 2 Department of Ecology and Evolutionary Biology, University of California, Los Angeles, California 90095, United States of America, 3 Department of Biological Sciences, California State University, Los Angeles, California 90032, United States of America ¤ Current address: 6465 Elmo Road, Cumming, Georgia 30028–4720, United States of America *
[email protected] a11111 Abstract A geographically isolated set of southern localities of the formerly monotypic goby genus Eucyclogobius is known to be reciprocally monophyletic and substantially divergent in mito- chondrial sequence and nuclear microsatellite-based phylogenies relative to populations to OPEN ACCESS the north along the California coast. To clarify taxonomic and conservation status, we con- ducted a suite of analyses on a comprehensive set of morphological counts and measures Citation: Swift CC, Spies B, Ellingson RA, Jacobs DK (2016) A New Species of the Bay Goby Genus from across the range of Eucyclogobius and describe the southern populations as a new Eucyclogobius, Endemic to Southern California: species, the Southern Tidewater Goby, Eucyclogobius kristinae, now separate from the Evolution, Conservation, and Decline. PLoS ONE Northern Tidewater Goby Eucyclogobius newberryi (Girard 1856). In addition to molecular 11(7): e0158543. doi:10.1371/journal.pone.0158543 distinction, adults of E. kristinae are diagnosed by: 1) loss of the anterior supratemporal lat- Editor: Tzen-Yuh Chiang, National Cheng-Kung eral-line canals resulting in higher neuromast counts, 2) lower pectoral and branched caudal University, TAIWAN ray counts, and 3) sets of measurements identified via discriminant analysis.