Acanthopleura loochooana ( Broderip & Sowerby, 1829 )

Sirenko, Boris I. & Zhang, Junlong, 2019, Chitons (Mollusca: Polyplacophora) of Hainan Island and vicinity, South China Sea, Zootaxa 4564 (1), pp. 1-40 : 24

Acanthopleura loochooana ( Broderip & Sowerby, 1829)

( Fig. 3F )

Chiton loochooanus Broderip & Sowerby 1829: 368 .

Acanthopleura loochooana ; Ferreira 1986: 245, 272, figs 55–61, 114L (bibliography); Bullock & Harper 1994: 31, pls. 4G–I, 6F, 8D, 9C–D,10D–F; Yoshioka & Nakashima 1996: 41, figs 1, 3–6; Saito 1998: 156; 2000: 19, pl. 9, fig. 5; 2006: 215; 2017: 54, 734, pl. 7, fig. 2; Hasegawa et al. 2001: 4; Kaas et al. 2006: 264, fig. 107, map 50 (bibliography and synonymy); Xu 2008: 457; Zhang et al. 2015: 100, fig. 6.

Liolophura loochooana ; Is. Taki 1962: 46; Iw. Taki 1964b: 412; Li et al. 1989: 3818, figs 1–8.

Type material. Type material is presumably lost; neotype: CAS 0 44306, designated by Ferreira 1986 .

Type locality. Loo Choo Islands for the lost types and restricted to Buckner Bay, Okinawa, Japan for the neotype.

Material examined. South China Sea, China, Hainan Island. Sanya, Luhuitou, on old corals, intertidal, 1spm, BL 19.0 mm, 22.03.1958, leg. O. Scarlato; among live and dead corals, intertidal, 2 spms, BL 13–14 mm, 0 5.04.1958, leg. P. Ushakov; transect III, stn 1, sample 2, 8 spms, BL 16–26 mm, 19.03.1958, leg. A. Strelkov & P. Ushakov ; stn 1, 2, intertidal, 2 spms, BL 21–32 mm, 20.03.1958, leg. A. Strelkov and P. Ushakov; Western beach, on rocks, 2 spms, BL 16–18 mm, 31.03.1958, leg. A. Gurjanova ; Eastern Island stn 1, 1 spm, BL 32 mm, 0 6.04.1958, leg. A. Strelkov, P. Ushakov and Baoling Wu on rocks, 1 spm, BL 22.0 mm, 0 4.01.1960, leg. O. Scarlato; stn. 2, 20°09’36’’N, 110°41′17’’E, depth 1–3 m, on stones, 2 spms, BL 10.0–16.0 mm, 13.11.2016, leg. B. Sirenko; stn. 3, 20°09’36’’N, 110°41′17’’E, intertidal, on stones, 9 spms, BL 4.0–20.0 mm, 13.11.2016, leg. B. Sirenko; stn. 4, 19°38’12’’N, 111°01′52’’E, intertidal pool, on rocks, 4 spms, BL 28.0–32.0 mm, 14.11.2016, leg. B. Sirenko; stn. 11, 18°23’17’’N, 109°51′29’’E, intertidal, on rocks, 11 spms, BL 10.0–12.0 mm, 16.11.2016, leg. S. Grebelniy; stn. 12, 18°23’17’’N, 109°51′29’’E, intertidal, on rocks, 4 spms, BL 25.0–28.0 mm, 16.11.2016, leg. J. Zhang; stn. 26, 18°11’46’’N, 109°29′40’’E, intertidal–1.5 m, on stones, 3 spms, BL 30.0–32.0 mm, 22.11.2016, leg. B. Sirenko and S. Grebelniy; stn. 28, 18°18’03’’N, 109°13′55’’E, depth 1.5– 2 m, on stones, 11 spms, BL 18.0–35.0 mm, 24.11.2016, leg. B. Sirenko; Xincun , Nanwanhou Id., stn 1, oyster bed, 2 spms, BL 23–24 mm, 19.04.1958, leg. O. Scarlato ; North beach, transect I, stn 1, sample 1, 1 spm, BL 30 mm, 15.04.1958, leg. D. Naumov.

Distribution. The species was reported from Shizuoka and Tanegashima Island, Japan, and southward to Taiwan, Hong Kong, Hainan and northern Vietnam up to Cat Ba Island.

Remarks. Acanthopleura loochooana differs from Liolophura japonica which inhabits the same area by having incompletely reduced slits in the insertion plates of the tail valve (vs. smooth insertion plates without slits of tail valve in L. japonica ).

Figures

FIGURE 3. Complete specimens of species of genera Lucilina, Onithochiton and Acanthopleura: A. Lucilina lamellosa forma typica, Xisha Islands, 58M-1246, BL 28.0 mm; B. Lucilina lamellosa forma costata, Hainan Island, 55-640, BL 21.0 mm; C. Lucilina tenuicostata, Hainan Island, stn 13, BL 10.0 mm; D. Onithochiton cf. hirasei, Guangdong Province, BL 29.0 mm; E. Onithochiton stracki, Guangdong Province, BL 19.0 mm; F. Acanthopleura loochooana, Hainan, stn 28, BL 26.0 mm.