Paguristes versus Komai, 2001

Osawa, Masayuki & Ota, Yuzo, 2020, New Records of Species of Gebiidea and Anomura (Crustacea: Decapoda) from the Sea of Japan, Species Diversity 25, pp. 295-307 : 298

Paguristes versus Komai, 2001

( Figs 2F , 3B )

Restricted synonymy.

Paguristes kagoshimensis non Ortmann, 1892 (= Paguristes digitalis Stimpson, 1858 ): Kim 1973: 214, 597, fig. 44, pl. 69, fig. 25; Miyake 1978; 35, fig. 12; Miyake 1982: 96, pl.

32, fig. 5.

Paguristes versus Komai, 2001: 406 , figs 23–27 (type locality: Okinoyama Bank , Sagami-nada, Japan, 34°59′N, 139°39′E; 105–113 m); McLaughlin et al. 2007: 54, 2 unnumbered figs.

Material examined. Tottori Prefecture. Off Nagaobana (35°55′N, 134°00′E), Tottori, 100 m, beam trawl, 15 May 2018, coll . Y . Ota, 3 males (sl 4.9–5.8 mm), TRPM-783.

Distribution. Japan, Korea, Taiwan; 80–221 m, possibly to 254 m ( Komai 2001; McLaughlin et al. 2007). Japanese records include the Pacific coast from Boso Peninsula to the Ohsumi Islands, northern Ryukyu Islands ( Komai 2001), and Toyama and Tottori Prefectures on the coast of the Sea of Japan ( Kikuchi 1932, as P. kagoshimensis Ortmann, 1892 ; present study).

Habitat. No previous records on the collection substrate, but sampling gears mentioned in the previous literature (e.g., Komai 2001; McLaughlin et al. 2007) suggest that specimens of P. versus were collected from soft bottoms. The present specimens were collected from the muddy sand substrate.

Remarks. This species had been referred to as Paguristes kagoshimensis in previous literature (cf. Miyake 1978, 1982). With the reexamination of the type material of P. kagosimaensis, Komai (2001) clarified that P. kagoshimensis was actually conspecific with P. digitalis Stimpson, 1858 , and assigned the taxon confounded with P. kagoshimensis to his new species P. versus . The occurrence of P. versus from the Sea of Japan has been confirmed by the present specimens, although Kikuchi (1932) had recorded “ P. kagoshimensis ” from Toyama Bay in the area.

Four species of the genus Paguristes Dana, 1851 are now known from the Sea of Japan with the addition of the two species recorded in this paper: P. digitalis , P. gonagrus , P.ortmanni Miyake, 1978 , and P. versus (cf. Motoh 2007; present study). Two species of the allied genus Areopaguristes Rahayu and McLaughlin, 2010 , A. hirsutimanus (Kobjakova, 1971) (junior synonym: Stratiotes nigroapiculus Komai, 2009 ) and A. japonicus (Miyake, 1961) , are also known from the Sea of Japan ( Motoh 2007, as Paguristes ; Komai 2009, as Stratiotes Thomson, 1899 ; Marin 2016).

Figures

Fig. 2. Preserved specimens. A, Austinogebia narutensis (Sakai, 1986), female (cl 18.9mm), TRPM-780, left lateral view; B, same, carapace, dorsal view; C, same, left lateral view, anterior part of body, showing pereopod 1; D, Austinogebia narutensis (Sakai, 1986), male (cl 17.9mm), TRPM-780, left lateral view; E, Paguristes gonagrus (H. Milne Edwards, 1836), male (sl 6.4mm), TRPM-782, dorsal view; F, Paguristes versus Komai, 2001, male (sl 5.8mm), TRPM-783, dorsal view; G, Nematopagurus australis (Henderson, 1888), female (sl 4.3mm), TRPM-784, dorsal view; H, Galathea guttata Osawa, 2004, male (pcl 3.1mm), TRPM-785, dorsal view; I, Munida agave Macpherson and Baba, 1993, ovigerous female (pcl 7.4mm), TRPM-788, dorsal view.

Fig. 3. Fresh specimens. A, Paguristes gonagrus (H. Milne Edwards, 1836), male (sl 6.4mm), TRPM-782, dorsal view; B, Paguristes versus Komai, 2001, male (sl 5.8mm), TRPM-783, right lateral view; C, Nematopagurus australis (Henderson, 1888), female (sl 4.3mm), TRPM- 784, dorsal view; D, Munida agave Macpherson and Baba, 1993, ovigerous female (pcl 7.5mm), TRPM-787, dorsal view; E, Munida pherusa Macpherson and Baba, 1993, ovigerous female (pcl 7.7mm), TRPM-802, dorsal view; F, Munida pherusa Macpherson and Baba, 1993, male (pcl 6.6mm), TRPM-802, dorsal view; G, Paramunida tricarinata (Alcock, 1894), ovigerous female (pcl 7.9mm), TRPM-790; H, Pagurus nipponensis (Yokoya, 1933), ovigerous female (sl 5.9mm), TRPM-798; I, Bathymunida brevirostris (Yokoya, 1933), female (pcl 5.4mm), TRPM-801.