Onithochiton cf. hirasei Pilsbry, 1901

Sirenko, Boris I. & Zhang, Junlong, 2019, Chitons (Mollusca: Polyplacophora) of Hainan Island and vicinity, South China Sea, Zootaxa 4564 (1), pp. 1-40 : 19-21

publication ID	https://doi.org/10.11646/zootaxa.4564.1.1
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DOI	https://doi.org/10.5281/zenodo.5922102
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scientific name	Onithochiton cf. hirasei Pilsbry, 1901
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Onithochiton cf. hirasei Pilsbry, 1901 View in CoL

( Fig. 3D View FIGURE 3 )

Onithochiton hirasei Pilsbry 1901: 203 View in CoL ; Huang & Xu 1964: 10; Wu 1969: 109, figs 6, 59–67; Kaas & Van Belle 1980: 59; 1998: 90; Bullock & Harper 1994: 34, pls. 8F, 11A–C, 12A, B; Saito 1998: 156; 2000: 21, pl. 10, fig. 13; 2006: 214; 2017: 51, 735, pl. 7, fig. 10; Hasegawa et al. 2001: 4; Ma 2004: 6, pl. 2, fig. H; Kaas et al. 2006: 389, fig. 166, map 63 (bibliography and synonymy); Xu 2008: 457; Zhang et al. 2015: 101, fig. 8.

Onithochiton (Onithoplax) hirasei View in CoL ; Is. Taki 1962: 47; Iw. Taki 1964b: 412.

Type material. Two syntypes (ANS 80571).

Type locality. Japan, Hizen , Hirado .

Material examined. South China Sea, Guangdong Province. MBM 100243, 45-378, 6 spms, BL 20.0–30.0 mm, 0 5.04.1954.

Distribution. Japan, Korea, Taiwan, Guangdong Province and Hainan Island.

Remarks. Most specimens from Guangdong Province studied by us have features which are slightly similar to that of O. stracki Sirenko, 2012 , namely they have spicules on the girdle, the girdle is not leathery and the sculpture of the tegmentum is stronger. Hiroshi Saito (personal communication) found that the specimens from central Japan have a smooth, glossy tegmentum and a leathery girdle whereas those from south Japan have a rather strong sculpture. He supposed also that the morphology of the sculpture and spicules change gradually from north to south.

References

Bullock, R. C. & Harper, K. D. (1994) The Polyplacophora of Cape d'Aguilar, Hong Kong. In: Morton, B. (Ed.), The Malacofauna of Hong Kong and Southern China III. Hong Kong University Press, Hong Kong, pp. 3 - 54.

Hasegawa, K., Saito, H., Kubodera, T. & Xu, F. (2001) Marine molluscs collected from the shallow waters of Hainan Island, South China Sea, by China-Japan joint research in 1997. In Matsuura, K (Ed.), Marine fauna of the shallow waters around Hainan Island, South China Sea, National Science Museum Monographs, Tokyo, 21, 1 - 43.

Huang, X. & Xu, F. (1964) Polyplacophora. In: Zhang, X., Qi, Z., Lou, Z., Huang, X., Ma, X., Liu, Y., Xu, F. (Eds.) Pictorial guide to animals of China. Vol. I. Science Press, Beijing, pp. 5 - 10.

Kaas, P. & Van Belle, R. A. (1980) Catalogue of Living Chitons. W. Backhuys. Rotterdam, 144 pp.

Kaas, P., Van Belle, R. A. & Strack, H. L. (2006) Monograph of Living Chitons (Mollusca: Polyplacophora). Vol. 6. Suborder Ischnochitonina (concluded): Schizochitonidae; Chitonidae. Additions to Vols 1 - 5. E. J. Brill, Leiden-Boston, 463 pp.

Ma, X. (2004) Polyplacophora. In: Qi, Z. (Ed.), Seashells of China. China Ocean Press, Beijing. pp. 3 - 6.

Pilsbry, H. A. (1901) New Mollusca from Japan, the Loo Choo Islands, Formosa and the Philippines. Proceedings of the Academy of Natural Sciences of Philadelphia, 53, 193 - 210.

Saito, H. (1998) The chitons (Mollusca: Polyplacophora) of the Goto Islands, west coast of Kyushu, Japan. Memoir of the National Science Museum, Tokyo, 31, 145 - 163

Sirenko, B. I. (2012) Chitons (Mollusca, Polyplacophora) of Nha Trang Bay, South Vietnam. In: Britayev, T. A. & Pavlov, D. S. (Eds.), Benthic fauna of the Bay of Nha Trang, South Vietnam. 2. KMK Scientific Press Ltd, Moscow, pp. 56 - 122.

Taki, Is. (1962) A list of the Polyplacophora from Japanese Islands and vicinity. Venus, 22, 29 - 53.

Taki, Iw. (1964 b) Classification of the class Polyplacophora, with a list of Japanese chitons. Venus, 22, 401 - 414.

Wu, S. - K. (1969) Some chitons from Taiwan (Formosa). Malacological Review, 2, 103 - 111.

Xu, F. (2008) Class Polyplacophora Blainville, 1867. In: Liu, R. (Ed.), Checklist of marine biota of China seas, pp. 456 - 459.

Zhang, J., Shi, Z., Wang, C., Zhang, S. & Zhang, S. (2015) Taxonomic study on some common species of Polyplacophora in the coast of China based on valves and radular morphology. Marine Sciences, 39, 96 - 107.

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.