A new hermit crab of the genus Calcinus from Rapa Island, French Polynesia with affinities to Calcinus dapsiles Morgan, 1989 and Calcinus sirius Morgan, 1991 (Decapoda: Anomura: Diogenidae)

Abstract A new hermit crab of the genus Calcinus Dana, 1851 is described from a specimen collected at a depth of 100 m near Rapa Island, Austral Islands, French Polynesia. In a previous report, we had reported this specimen provisionally as Calcinus aff. sirius, pending availability of live color data for Calcinus sirius Morgan, 1991. Recently obtained color photographs of live C. sirius from the Solitary Islands, Eastern Australia, has shown that the specimen from Rapa Island is distinct from Morgan’s taxon and represents a new species which is fully illustrated and described herein as Calcinus shawi sp. nov. The morphology and coloration of this new species are compared with the closely allied C. sirius and Calcinus dapsiles Morgan, 1989.

摘要 本文记述了采自法属波利尼西亚南方群岛拉帕岛附近100米水深的Calcinus属（Calcinus Dana, 1851）新寄居蟹1种。此前在一份研究报告中，因尚未获取1991年Morgan发表的Calcinus sirius（Calcinus sirius Morgan, 1991）的活体色彩资料，我们曾将该标本暂定鉴定为Calcinus sirius近缘种（Calcinus aff. sirius）。近期我们获取了采自澳大利亚东部索利塔尔群岛的活体C. sirius的彩色照片，经比对发现该拉帕岛标本与Morgan所记述的该分类群存在显著差异，实为一新种；本文对其进行了完整的形态绘图与详细描述，并将其命名为Calcinus shawi新种（Calcinus shawi sp. nov.）。本文还将该新种的形态与体色特征，与其近缘类群C. sirius以及1989年Morgan发表的Calcinus dapsiles（Calcinus dapsiles Morgan, 1989）进行了对比分析。