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Issue: Vol. 5419 No. 1: 5 Mar. 2024
Type: Article
Published: 2024-03-05
DOI: 10.11646/zootaxa.5419.1.5
Page range: 121-129
Abstract views: 82
PDF downloaded: 5

A new species of the genus Trichopagurus de Saint Laurent, 1968 (Crustacea: Decapoda: Anomura: Paguridae) from a semi-submerged marine cave in Okinawa Island, southwestern Japan

Graduate School of Engineering and Science; University of the Ryukyus; 1 Senbaru; Nishihara; Okinawa 903–0213; Japan
Okinawa Prefectual University of Arts; 1-4 Shuri-Tounokura; Naha; Okinawa 903-8602; Japan
Estuary Research Center; Shimane University; 1060 Nishikawatsu-cho; Matsue; Shimane; 690-8504 Japan
Crustacea Paguroidea dark environment cryptic fauna western Pacific

Abstract

A new hermit crab species of Paguridae, Trichopagurus spinibrachium n. sp., is described on the basis of a single male specimen collected from the anchialine environment of a semi-submerged marine cave in Okinawa Island, Ryukyu Islands, southwestern Japan. It is morphologically similar to T. macrochela Komai & Osawa, 2005 and T. tenuidactylus Komai, 2013, but differs in the shape and armature of the ocular, antennular and antennal peduncles, chelipeds, and ambulatory legs. The new species may be distinguished from all known congeners by the stronger armature of the carpi and meri of both chelipeds. Trichopagurus spinibrachium n. sp. is the third species of the genus recorded from submarine caves, although it may also occur on nearby coral reefs as does T. macrochela and T. trichophthalmus (Forest, 1954).

 

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