Abstract

Small usually beautifully coloured mussels from the Kattegat were to date identified as Modiolus adriaticus (Lamarck, 1819) since C.G.Johs. Petersen’s account of the shell-bearing molluscs was published in 1888. However, these mussels from Danish and Swedish waters represent a very distinct new species which also is endemic. The present paper serves to describe this new species, Modiolus cimbricus sp. nov., which belongs to the genus Modiolus Lamarck, 1799. The genus Gibbomodiola Sacco, 1898, to which Modiolus adriaticus has been moved, is here synonymized with Modiolus Lamarck, 1799.

Highlights

  • The bivalve family Mytilidae Rafinesque, 1815 is diverse and species live in most parts of the world, from the shore to the deep sea

  • Four mytilid bivalves are known from the Skagerrak-Kattegat region: Mytilus edulis Linnaeus, 1758; Modiolus modiolus (Linnaeus, 1758); Modiolula phaseolina (Philippi, 1844) and a species previously recorded under the name Modiolus adriaticus

  • Usually beautifully coloured mussels from the Kattegat were to date identified as Modiolus adriaticus (Lamarck, 1819) since C.G.Johs

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Summary

Introduction

The bivalve family Mytilidae Rafinesque, 1815 is diverse and species live in most parts of the world, from the shore to the deep sea. Four mytilid bivalves are known from the Skagerrak-Kattegat region: Mytilus edulis Linnaeus, 1758; Modiolus modiolus (Linnaeus, 1758); Modiolula phaseolina (Philippi, 1844) and a species previously recorded under the name Modiolus adriaticus (auct.). Usually beautifully coloured mussels from the Kattegat were to date identified as Modiolus adriaticus (Lamarck, 1819) since C.G.Johs. Petersen’s account of the shell-bearing molluscs was published in 1888. These mussels from Danish and Swedish waters represent a very distinct new species which is endemic. We define this new species which belongs to the genus Modiolus Lamarck, 1799

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