Four genes,morphology and ecology: distinguishing a new species of <Emphasis Type="Italic">Acesta</Emphasis> (Mollusca; Bivalvia) from the Gulf of Mexico |
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| Authors: | Johanna Järnegren Christoffer Schander Jon-Arne Sneli Vera Rønningen Craig M Young |
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| Institution: | (1) Norwegian Institute for Nature Research, 7485 Trondheim, Norway;(2) Department of Biology, Norwegian University of Science and Technology, Trondhjem Biological Station, 7491 Trondheim, Norway;(3) Centre for Geobiology, University of Bergen, Allegaten 41, 5007 Bergen, Norway;(4) Department of Biology, University of Bergen, P.O. Box 7800, 5020 Bergen, Norway;(5) Oregon Institute of Marine Biology, University of Oregon, P.O. Box 5389, Charleston, OR 97420, USA |
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| Abstract: | There is currently an active scientific debate about the most correct and efficient way to identify species. To date, few studies in the marine realm have combined the available taxonomic methods. In this study we have used morphology, ecology and molecular analyses to identify a new species within the bivalve genus Acesta. All four genes studied (12S, 16S, Cytb, COI) suggested that a common cold-seep species in the Gulf of Mexico, A. bullisi, should be divided into two distinct species. This conclusion was supported by morphological traits and by observations of ecological distribution. A. oophaga Järnegren, Schander and Young n. sp. is described here, and A. bullisi Vokes (Tulane Stud Geol 2:75–92, 1963) is re-described. This study shows that DNA barcoding in combination with traditional morphological and ecological analyses may be an important tools to identify hidden biodiversity among deep-water organisms such as bivalves. |
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