[Crustacea • 2020] Kumepagurus kaikata (Decapoda: Anomura: Paguroidea) • A New Species of Pagurid Hermit Crab assigned to the Genus Kumepagurus Komai & Osawa, 2012 from the Kaikata Seamount, Izu-Ogasawara Arc, Japan

Kumepagurus kaikata  Komai, 2020

 DOI: 10.11646/zootaxa.4858.2.5 

Abstract

A new pagurid hermit crab species is assigned to the genus Kumepagurus Komai & Osawa, 2012, previously represented only by the type species, K. cavernicolus Komai & Osawa, 2012, known only from a marine cave on Ryukyu Islands, northwestern Pacific. The assignment is made because of the lack of an accessory tooth on the maxilliped 3 ischium, the operculiform right chela, the presence of two distal corneous claws on the left chela fixed finger, the simple pereopods 4 and the development and structure of the male sexual tubes on both coxae of pereopods 5, all characteristic to the type species of the genus. However, in contrast to K. cavernicolus, K. kaikata n. sp. lacks pleurobranchs on the thoracomeres 5 and 6, and in this regard, Kumepagurus is unusual in the family Paguridae. The generic diagnosis of Kumepagurus is emended to accommodate the new species, which is readily distinguished from K. cavernicolus by the proportionately shorter antennular and antennal peduncles and the right cheliped structure and ornamentation, in addition to the difference in the gill number.

Keywords: Crustacea, gill number, Kumepagurus kaikata, northwestern Pacific

Tomoyuki Komai. 2020. A New Species of Pagurid Hermit Crab assigned to the Genus Kumepagurus Komai & Osawa, 2012 (Decapoda: Anomura: Paguroidea) from the Kaikata Seamount, Izu-Ogasawara Arc, Japan. Zootaxa. 4858(2); 241–250. DOI: 10.11646/zootaxa.4858.2.5

[Crustacea • 2020] Turleania rubriguttatus • A New Species of Pagurid Hermit Crab (Decapoda: Anomura: Paguroidea) from Shallow Water in Japan, with Notes on T. senticosa (McLaughlin & Haig, 1996)

Turleania rubriguttatus Komai, 2020

 DOI: 10.11646/zootaxa.4834.1.6 

Abstract

A new species of the pagurid hermit crab genus Turleania McLaughlin, 1997, Turleania rubriguttatus, is described on the basis of two specimens, including one male and one female, from shallow subtidal waters in Kochi Prefecture, Japan. The new species appears close to T. albatrossae (McLaughlin & Haig, 1996), known from the Philippines, but the proximally unarmed dorsal surface of the right chela palm and the lack of a dorsomesial row of spines on the left cheliped carpus easily distinguish T. rubriguttatus n. sp. from T. albatrossae. Examination of the type material of T. similis Komai, 1999 and T. spinimanus Komai, 1999, and supplemental material from Japan, confirms that the two taxa are synonymous with T. senticosa (McLaughlin & Haig, 1996), as was suggested by previous authors. Re-examination clarified that in T. senticosa the maxilliped 3 has no developed arthrobranchs, and this led the author to assess the status of T. sinensis Han, Sha & An, 2016, which is also synonymised with T. senticosa.

Keywords: Decapoda, Kochi Prefecture, synonym, Turleania sinensis, Turleania spinimanus

Tomoyuki Komai. 2020. Turleania rubriguttatus, A New Species of Pagurid Hermit Crab (Decapoda: Anomura: Paguroidea) from Shallow Water in Japan, with Notes on T. senticosa (McLaughlin & Haig, 1996). Zootaxa. 4834(1); 96–106. DOI: 10.11646/zootaxa.4834.1.6