A new species of Nesotanais (Crustacea, Tanaidacea) from Japan, with a key to species and a note on male chelipeds

Abstract

The new species Nesotanais ryukyuensis sp. n. is described from Japan. Nesotanais ryukyuensis most closely resembles N. rugula Bamber, Bird & Angsupanich, 2003, but can be distinguished by the length of simple seta on maxillipedal basis and the shape of cheliped in male. A key to species of the genus Nesotanais is given. The male chelipeds of N. rugula are redescribed. The serial ridges on the inner surface of the chelipedal propodus and dactylus in Nesotanais ryukyuensis and N. rugula are likely to be stridulating ridges that might produce sound

Molecular Systematics of Tanaidacea (Crustacea: Peracarida) Based on 18S Sequence Data, with an Amendment of Suborder/Superfamily-Level Classification

“…Most tanaidaceans are marine, having been reported from around the world, ranging in depth from coastal areas (1-2 m) to the deep-sea bottom at about 9000 m (cf. Kudinova-Pasternak, 1972); a few freshwater and brackish species are also known (Kakui et al, 2010). At present, more than 1000 extant and 13 fossil species are classified into 35 families (Anderson, 2010;Larsen, 2011).…”

Nototanaids (Crustacea: Tanaidacea) from Japan, with the Description of a New Species of Nototanoides

“…Except for the species of Stachyops and Nototanais, nototanaids have generally been reported from tropical and subtropical regions ( Fig. 1A; Sieg 1980Sieg , 1986Sieg and Heard 1985;Larsen 2005;Larsen and Shimomura 2008;Kakui et al 2010;Araújo-Silva and Larsen 2012;Bamber 2012;Bird 2012b;Esquete et al 2012;Kakui and Angsupanich 2012;this study). Two nototanaids are known from Japan.…”

“…Two nototanaids are known from Japan. One is Nesotanais ryukyuensis Kakui, Kajihara and Mawatari, 2010, which was described from a brackish habitat on Okinawa Island and which has also been collected from Iriomote and Amami-Oshima Islands ( Fig. 1B; Kakui et al 2010;Kakui unpubl.…”

First Report of Teleotanaidae (Crustacea: Tanaidacea) from the Northwestern Pacific, with the Description of a New Species

“…Orientation and terminology here follow Larsen (2003), except that the term "plumose sensory seta" (PSS; Bird 2011) was used instead of "broom seta", and the term "steptipped plumose seta" (Kakui et al 2010) was used. We proposed two new terms, "serrate-tipped curved-spiniform seta(e)" and "serrate-tipped spiniform seta(e)" for the setae found in the inner dorsodistal/dorsosubdistal regions of the maxillipedal endite.…”