Procepon insolitum Shiino, 1937

Procepon insolitum Shiino, 1937 View in CoL

( Fig. 5 View FIGURE 5 )

Procepon insolitum Shiino, 1937: 480–486 View in CoL , figs. 3–5 (Hatekeshima, Tanabe Bay, Japan, infesting “ Gebia major View in CoL ” (= Upogebia major (De Haan, 1841) View in CoL ; Shiino, 1958: 49–50, pl. 3 fig. 5, text fig. 11 (Sugashima, Mie Prefecture, Japan, infesting U. issaeffi (Balss, 1913) View in CoL ; Bourdon, 1967: 167 (mention); Bourdon, 1968 82 (mention); Shiino, 1972: 8 (list); Markham, 1985: 28, 29, fig. 13 (Phuket, Thailand, infesting U.cf. lincolni View in CoL Ngoc-Ho, 1977); Markham, 1988: 17 (mention); Markham, 1990: 556 (mention); Saito et al., 2000: 43 (list); Kensley, 2001: 225 (list); Markham, 2001: 199, 201 (list); Itani, 2004a: 14, 15, figs. 1, 2, 4 ( Japan, infesting Upogebia sp. ); Itani, 2004b: 38 ( Japan, infesting U. carinicauda (Stimpson, 1860) View in CoL , U. major View in CoL , and U. yokoyai Makarov, 1938 View in CoL ); An et al., 2009: 242 (mention); Chapman et al., 2011: 1228 (mention); Itani et al., 2014: 111 (mention); Sato et al., 2021: 20, 21, fig. 3B (Ariake and Yatsushiro Seas, Kyushu, Japan, infesting U. major View in CoL ).

“ Bopyrus View in CoL in left gill chamber”— Sakai, 2006: 141454 (SMF 30541).

Material Examined: Japan: Mature female (10.5 mm) ( SMF 58107) and mature male (4.2 mm) ( SMF 58107), infesting left branchial chamber of female Upogebia yokoyai Markarov, 1938 (12.9 mm CL), mature female (9.2 mm), infesting right branchial chamber of female U. yokoyai (12.0 mm CL), Umino-nakamuchi, Irimote-jima, Ryukyu Islands, coll. K. Sakai, 14 Feb 1995 ( SMF 30541).

Hosts: Upogebia carinicauda (Stimpson, 1860) , U. issaeffi (Balss, 1913) , U. cf. lincolni Ngoc-Ho, 1977, U. major (De Haan, 1841) , and U. yokoyai Makarov, 1938 (see Markham 1985; Itani 2004).

Remarks: Upogebia yokoyai was first reported as a host for Procepon insolitum by Itani (2004). SMF 30541 contains three males (9.9–14.0 mm CL), eight females (7.8–12.5 mm CL), and one ovigerous female (11.2 mm CL); Sakai (2006: 145) stated that one female was infested but the total is two infested females. The female ( Fig. 5A, B View FIGURE 5 ) and male ( Fig. 5C, D View FIGURE 5 ) specimens match closely the original description of Procepon insolitum ( Shiino, 1937) .