Tugonia (Distugonia) decurtata A. Adams 1851
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Description
Tugonia (Distugonia) decurtata (A. Adams, 1851)
Figure 6 L
Sphenia decurtata A. Adams, 1851: 88 –89.
Cryptomy decurtata (A. Adams, 1851) — A. Adams, 1868: 366; Beets, 1949: 273, 277; Beets, 1950: 17.
Mya decurtata (A. Adams, 1851) — Sowerby, 1875: sp. 11, pl. III, fig. 11.
Distugonia decurvata (A. Adams, 1851) — Habe, 1951: 75, pl. 12, figs. 15 & 16; Habe, 1961: 140, pl. 63, fig. 11; Habe, 1968: 205, pl. 63, fig. 11; Habe, 1977: 279, pl. 58, figs. 7 & 8; Wu, 1980: 189; Xu, 1997: 230; Xu, 2008: 590; Okutani, 2000: 1021, pl. 508, fig. 4 [spelling error].
Distugonia decurtata (A. Adams, 1851) — Bernard et al. 1993: 107.
Tugonella decurtata (A. Adams, 1851) — Huber, 2010: 461 (text-fig.).
Distribution and habitat. Miocene to Recent. Taiwan, China; Japan; Philippines. Intertidal mud bottom to 50 m.
Type locality. Catanuan, Province of Tayabas, Island of Luzon, in sand at low water depths.
Diagnosis. Length to 30 mm; shell slightly inflated, elongate-oval; umbo prominent, situated subcentral; posterior area demarcated by ridge; chondrophore projecting in the left valve, right valve resilifer compressed; pallial sinus shallow, not reaching further anterior than posterior adductor scar; pallial line thin.
Remarks. This species had been incorrectly spelled as decurvata by some Japanese and Chinese authors.
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References
- Adams, A. (1851) Monograph of Sphaenia, a genus of lamellibranchiate Mollusca. Proceedings of the Zoological Society of London, 18 (206), 86 - 89.
- Adams, A. (1868) On the species of Caecidae, Corbulidae, Volutidae, Cancellariidae and Patellidae found in Japan. Annals and Magazine of Natural History, 4 th Series, 2, 368 - 369.
- Beets, C. (1949) On probably young-Miocene fossils from the Coal Concession Batoe Panggal, near Tenggarong (Samarinda), Eastern Borneo. Leidse Geologische Mededelingen, 15, 265 - 281.
- Beets, C. (1950) Precis des especes fossiles du genre Cryptomya Conrad. Basteria, 14 (1 - 2), 16 - 20.
- Sowerby, G. B. II. (1875) Monograph of the genus Mya. In Reeve, L. A. and G. B. Sowerby, II (eds.), 1843 - 1878, Conchologia iconica, or, Illustrations of the shells of molluscous animals, L. Reeve and Co., London, vols. 20.
- Habe, T. (1951) Donacidae and Myidae in Japan. In: Kuroda, T. (Ed.), Illustrated catalogue of Japanese Shells, Kyoto, Japan, 12, pp. 71 - 76.
- Habe, T. (1961) Coloured Illustrations of the Shells of Japan. II. Hoikusha Publishing Company, Osaka, Japan, 182 pp.
- Habe, T. (1968). Shells of the western Pacific in color, Vol. 2. Revised Edition. Hoikusha Publication Company Ltd., Osaka, Japan, 233 pp.
- Habe, T. (1977) Systematics of Mollusca in Japan. Bivalvia and Scaphopoda. Hokuryukan, Tokyo, 372 pp.
- Wu, W. - L. (1980) The list of Taiwan bivalve fauna. Quarterly Journal of the Taiwan Museum, 33 (1 - 2), 65 - 208.
- Xu, F. - S. (1997) Bivalve Mollusca of China Sea. Science Press, Beijing, 333 pp.
- Okutani, T. (2000) Marine mollusks in Japan. Tokai University Press, Tokyo, 1173 pp.
- Bernard, F. R., Cai Ying-ya & Morton, B. (1993) Catalogue of the living marine bivalve molluscs of China. Hong Kong University Press, Hong Kong, 146 pp.
- Huber, M. (2010) Compendium of bivalves. ConchBooks, Hackenheim, Germay, 901 pp.