A new stem-climbing assimineid, Assiminea ganghwensis n. sp. (Caenogastropoda: Truncatelloidea: Assimineidae) from the salt marshes of South Korea

초록

Assiminea ganghwensis Fukuda, S. Kim, Sawada and J.-S. Hong, n. sp. is described from salt marsh habitats in inner bays along the western and southern parts of the Korean Peninsula. According to a molecular phylogenetic analysis it is a member of Assiminea Fleming, 1828. The species is unique in the genus in having distinct spiral cords on the teleoconch surface, but the black seminal receptacle is also known in A. grayana (Fleming, 1828) and A. parasitologica Kuroda, 1958. In the new species, the protoconch is large with distinct spiral cords and therefore assumed to represent direct development. The central teeth of the radula have two pairs of basal cusps. The ganglia in the circumoesophageal nerve ring are very concentrated. Other anatomical characters including the digestive and reproductive systems are generally similar to those of Assiminea species hitherto known. Ecologically, within the Assimineidae the new species exhibits a previously unreported stem-climbing behaviour on salt marsh plants.ZooBank registration: https://www.zoobank.org/NomenclaturalActs/94016243-A4F7-470F-BB17-4A1FAFBC39B8

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