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Genetic relationships between Nereimyra punctata and N-woodsholea (Hesionidae, Polychaeta)

Journal article
Authors Arne Nygren
Fredrik Pleijel
Per Sundberg
Published in Journal of Zoological Systematics and Evolutionary Research
Volume 43
Issue 4
Pages 273-276
ISSN 0947-5745
Publication year 2005
Published at Department of Zoology
Department of Marine Ecology
Pages 273-276
Language en
Keywords nereimyra, polychaeta, hesionidae, coi, parsimony, genetic, phylogeny
Subject categories Biological Sciences


We present a COI-based parsimony analysis of the relationships between the shallow water, pigmented hesionid polychaete Nereimyra punctata, and a deep-water, unpigmented form with sympatric distribution in Norway and Sweden. Apart from the pigmentation differences, the two forms exhibit no observed morphological differences. The terminals are represented by four specimens each of the two forms from the Trondheimsfjord in Norway, and four each of the two forms from northern Bohuslan in Sweden, plus members of the two hesionids Heteropodarke and Ophiodromus as outgroups. In addition, the analysis includes a topotype of the morphologically similar and unpigmented Nereimyra woodsholea from the Middle Atlantic Bight off the US east coast. The equally weighted matrix includes 132 informative characters. All most-parsimonious trees unequivocally indicate that specimens belonging to the same form (pigmented or unpigmented) from different areas are cladistically closer related to each other than different forms from the same areas. Nereimyra woodsholea is nested within the unpigmented deeper group of the Norwegian and Swedish specimens, thus indicating that this name should be applied to the deep-water form in Norway and Sweden.

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