Range extension for the region of sympatry between the nudibranchs Hermissenda opalescens and Hermissenda crassicornis in the northeastern Pacific
Autor: | Paul D. N. Hebert, Tao M. Eastham, A.L. Ka’ala Estores-Pacheco, Dirk Steinke, Ángel Valdés, Nola B. Sheets, Emily M. Merlo, Kathryn A. Milligan, Christopher J. Neufeld, Russell C. Wyeth |
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Rok vydání: | 2018 |
Předmět: |
Sympatry
food.ingredient 010504 meteorology & atmospheric sciences Range (biology) Zoology Hermissenda opalescens Biology 01 natural sciences range shifts pseudocryptic species Hermissenda 03 medical and health sciences 0302 clinical medicine food Sensu Genus distribution lcsh:Science 0105 earth and related environmental sciences Multidisciplinary Nudibranch biology.organism_classification Hermissenda crassicornis lcsh:Q lcsh:L 030217 neurology & neurosurgery lcsh:Education |
Zdroj: | FACETS, Vol 3, Pp 764-776 (2018) |
ISSN: | 2371-1671 |
Popis: | The mollusc nudibranch genus Hermissenda Bergh, 1879 was recently discovered to include three pseudocryptic species, dividing a single species H. crassicornis (sensu lato) into H. crassicornis Escholtz, 1831, H. opalescens J.G. Cooper, 1863, and H. emurai Baba, 1937. The species were distinguished by both genetic and morphological evidence, and the distribution of sampled animals suggested the three species had mostly distinct geographical ranges. Here, we report the presence of both H. crassicornis and H. opalescens in Barkley and Clayoquot Sounds, British Columbia, Canada, based on diagnostic characters and molecular data congruent with the differences described for these two species. This result extends the region of sympatry for the two species from northern California, USA, to, at least, Vancouver Island, British Columbia in 2016. Depending on how long this overlap has occurred, the possible northward expansion of H. opalescens would have implications for understanding the effects of short- or long-term environmental changes in ocean temperatures as well as complicating the interpretation of past neurobiological studies of H. crassicornis (sensu lato). |
Databáze: | OpenAIRE |
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