Peregrinamor ohshimai Shoji 1938

Peregrinamor ohshimai Shôji, 1938 Erycina sp. Miyazaki, 1936: 38, pl. 12, text fig. 1 (Japan, infesting U. major (De Haan, 1841); Miyazaki, 1938: 1215–1216, text figs. 4–9 (Japan, infesting U. major). Peregrinamor ohshimai Shôji, 1938: 119–127, pls. 3–4; Kato & Itani, 1995: 941–946, figs. 1, 2 (Japan, infesting U. major and Austinogebia. narutensis (Sakai, 1986)); Sakai et al., 1995: 45–48, fig. 2 (Japan, infesting U. issaeffi (Balss, 1913) and U. major); Itani et al., 2002: 70–76, fig. 1 (Japan, infesting U. major); Lützen et al., 2001: 313–324, figs. 1, 2, 7–21 (Japan, infesting U. major); Sakai, 2006: 121, 125, 145 (Japan, infesting U. issaeffi, U. major, and U. yokoyai Makarov, 1938); Kil & Park, 2009: 205–206, fig. 1 (South Korea, infesting U. major); Dworschak et al., 2012: 178 (mention), 193 (list); Sato et al., 2021: 20, 22 (Japan, infesting U. major); Kim et al., 2023: 2304 (South Korea, infesting U. major). Material Examined: Japan: One 5.9 mm, one 6.0 mm, and one 5.9 mm specimen (SMF 365583), each attached to ventral surface of a male (all three hosts 9.3 mm CL) Upogebia yokoyai Markarov, 1938, littoral, coarse sand, Uranouchi Inslet, Utsaga, Usa, Kochi, coll. K. Sakai, 20 May 1990 (SMF 30525). One 11.0 mm and one 12.0 mm specimen, loose in jar (SMF 365586), from unknown individuals of U. issaeffi (Balss, 1913), Kokatu-jima, Anan, Tokushima Prefecture, coll. K. Sakai, 26 Apr 1992 (SMF 30597). One 6.1 mm specimen attached to the ventral surface of a male (9.9 mm CL) and one 5.7 mm specimen (SMF 365585), attached to the ventral surface of a female U. yokoyai, Warabi-jima, Izumi City, Kagoshima, coll. H. Mukai, 2 Jun 1989 – 13 Mar 1993 (SMF 30529). One 5.0 mm specimen attached to the ventral surface of a male (5.6 mm CL) and one 4.5 mm specimen (SMF 365584), attached to the ventral surface of a male (7.8 mm CL) U. yokoyai as well as one loose 6.2 mm specimen from unknown host of this species, Minamata-gawa, Minamata, Kumamoto, coll. H. Mukai, 3 Apr 1992 (SMF 30528). Five loose specimens (7.2, 7.5, 7.8, 9.0, 10.5 mm) (SMF 365587), from unknown host U. issaeffi, Kokatu-jima, Anan, Tokushima, coll. K. Sakai, 1 Aug 1993 (SMF 30603). One 7.9 mm specimen attached to the ventral surface of a male (12.1 mm CL), one 7.3 mm specimen attached to the ventral surface of a male (10.6 mm CL), one 6.3 mm specimen attached to the ventral surface of a male (10.1 mm CL), one 6.3 mm specimen attached to the ventral surface of a male (9.3 mm CL), one 6.9 mm specimen (SMF 365589), attached to the ventral surface of a male (10.3 mm CL) U. issaeffi, Kokatu-jima, Anan, Tokushina, coll. K. Sakai & S. Maeda, 15 Sep 1993 (SMF 30607). One 7.9 mm specimen attached to the ventral surface of a male (11.2 mm CL), and one 9.0 mm specimen (SMF 365588), attached to the ventral surface of a male (12.1 mm CL) U. issaeffi, Kokatu-jima, Anan, Tokushina, coll. K. Sakai & S. Maeda, 15 Sep 1993 (SMF 30606). Hosts: Upogebia isaeffi (Balss, 1913), U. major (De Haan, 1841), U. yokoyai Makarov, 1938. Remarks: One male host from SMF 30525 cited above was also infested with a pair of Gyge ovalis (Shiino, 1939) in the right branchial chamber. SMF 30597 contains 20 male (6.7–19.2 mm CL) and 10 female (16.6–24.5 mm CL) U. issaeffi; Sakai (2006: 120) listed this material but made no mention of clams on any specimen in this lot. SMF 30529 contains four male (5.2–9.5 mm CL) and one female (7.2 mm CL) U. yokoyai without associates, as well as a juvenile grapsoid crab. SMF 20528 contains five male (7.4–12.3 mm CL) and two female (9.8–14.8 mm CL) U. yokoyai; Sakai (2006: 145) listed this material but made no mention of clams on any specimens in this lot. SMF 30603 contains three male (11.3–11.5 mm CL) and three female (9.9–14.2 mm CL) U. issaeffi; the specimen label and Sakai (2006: 121) stated that each of the six hosts bore one clam but there are only five loose clams in the jar now; each of the six mud shrimp also bears numerous minute juvenile clams on the ventral surface.