Abstract
A new cocculinid species collected from a dolphin skull in the East China Sea is described and assigned to the genus Cocculina Dall, 1882. This new species, Cocculina delphinicula sp. nov., has a medium sized, depressed shell sculptured with regularly spaced concentric growth lines and fine radial threads. The radula has a formula of (ca. 20)+5+1+5+(ca. 20) with a vestigial rachidian, lateral 1 weak but well defined, having an outline that frequently terminates into a small beak-like cusp, laterals 2 and 3 with 3–4 cusps, lateral 4 with a large primary cusp and an outer secondary cusp.
References
Ardila, N.E. & Harasewych, M.G. (2005) Cocculinid and pseudococculinid limpets (Gastropoda: Cocculiniformia) from off the Caribbean coast of Colombia. Proceedings of the Biological Society of Washington, 118 (2), 344–366.
https://doi.org/10.2988/0006-324X(2005)118[344:CAPLGC]2.0.CO;2Braby, C.E., Rouse, G.W., Johnson, S.B., Jones, W.J. & Vrijenhoek, R.C. (2007) Bathymetric and temporal variation among Osedax boneworms and associated megafauna on whale-falls in Monterey Bay, California. Deep-Sea Research I, 54, 1773–1791.
https://doi.org/10.1016/j.dsr.2007.05.014Chen, W.D. (2005) Shells from Donggang Township. 2. The Pei-yo, 31, 48–53. [in Chinese]
Cuvier, G. (1812) Rapport fait à la classe des Sciences mathématiques et physiques, sur divers Cétacés pris sur les côtes de France, pricipalement sur ceux qui sont échoués près de Paimpol, le 7 janvier 1812. Annales du Muséum d'Histoire naturelle, 19, 13–14.
Dall, W.H. (1882) On certain limpets and chitons from the deep waters off the eastern coast of the United States. Proceedings of the United States National Museum, 4, 400–414.
https://doi.org/10.5479/si.00963801.4-246.400Dall, W.H. (1907) Descriptions of new species of shell, chiefly Buccinidae, from the dredgings of the U.S.S. “Albatross” during 1906, in the northwestern Pacific, Bering, Okhotsk and Japanese Seas. Smithsonian Miscellaneous Collections, 50 (2), 139–173.
Dall, W.H. (1908) Reports from ‘‘Albatross’’ dredging operations. The Mollusca and Brachiopoda. Bulletin of the Museum of Comparative Zoology at Harvard College, 43, 205–487.
https://doi.org/10.5962/bhl.title.46539Fujiwara, Y., Kawato, M., Yamamoto, T., Yamanaka, T., Sato-Okoshi, W., Noda, C., Tsuchida, S., Komai, T., Cubelio, S.S., Sasaki, T., Jacobsen, K., Kubokawa, K., Fujikura, K., Maruyama, T., Furushima, Y., Okoshi, K., Miyake, H., Miyazaki, M., Nogi, Y., Yatabe, A. & Okutani, T. (2007) Three-year investigations into sperm whale-fall ecosystems in Japan. Marine Ecology, 28, 219–232.
https://doi.org/10.1111/j.1439-0485.2007.00150.xHasegawa, K. (1997) Sunken wood-associated gastropods collected from Suruga Bay, Pacific side of the central Honshu, Japan, with descriptions of 12 new species. National Science Museum Monographs, 12, 59–123.
Haszprunar, G. (1987) Anatomy and affinities of cocculinid limpets (Mollusca, Archaeogastropoda). Zoological Scripta, 16, 305–324.
https://doi.org/10.1111/j.1463-6409.1987.tb00077.xHickman, C.S. (1983) Radula patterns, systematics, diversity, and ecology of deep-sea limpets. The Veliger, 26 (2), 73–92.
Kuroda, T. & Habe, T. (1949) On the gastropod genus Cocculina from Japan. Venus, 15, 58–67.
Marshall, B.A. (1986) Recent and Tertiary Cocculinidae and Pseudococculinidae (Mollusca: Gastropoda) from New Zealand and New South Wales. New Zealand Journal of Zoology, 12, 505–546.
https://doi.org/10.1080/03014223.1985.10428301Marshall, B.A. (1987) Osteopeltidae (Mollusca: Gastropoda): A new family of limpets associated with whale bone in the deep-sea. Journal of Molluscan Studies, 53, 121–127.
https://doi.org/10.1093/mollus/53.2.121McLean, J.M. (1987) Taxonomic descriptions of cocculinid limpets (Mollusca, Archaeogastropoda): two new species and three rediscovered species. Zoologica Scripta, 16 (4), 325–333.
https://doi.org/10.1111/j.1463-6409.1987.tb00078.xMcLean, J.M. (1992) Cocculiniform limpets (Cocculinidae and Pyropeltidae) living on whale bone in the deep sea off California. Journal of Molluscan Studies, 58, 401–414.
https://doi.org/10.1093/mollus/58.4.401McLean, J.H. & Harasewych, M.G. (1995) Review of western Atlantic species of cocculinid and pseudococculinid limpets, with descriptions of new species (Gastropoda: Cocculiniformia). Natural History Museum of Los Angeles County Contributions to Science, 453, 1–33.
Okutani, T. (2017) Marine Mollusks in Japan. 2nd Edition. Tokai University Press, Tokyo, 1375 pp.
Schepman, M.M. (1908) The Prosobranchia of the Siboga Expedition. Part I. Rhipidoglossa and Docoglossa. Uitkomsten op Zoologisch, Botanisch, Oceanographisch en Geologisch Gebied verzameld in Nederlandsch Oost-Indie 1899–1900 aan boord H.M. Siboga, 49, 1–95.
Showstack, R. (1998) Whale falls may provide important stepping stone habitat between deep sea vents and seeps. Eos, Transactions American Geophysical Union, 79 (4), 45–46.
https://doi.org/10.1029/98EO00030Smith, C.R. & Baco, A.R. (1998) Phylogenetic and functional affinities between whale-fall, seep, and vent communities. Cahiers de Biologie Marine, 39, 345–346.
Smith, C.R. & Baco, A.R. (2003) Ecology of whale falls at the deep-sea floor. Oceanography and Marine Biology, 41, 311–354.
Warén, A. (1991) New and little known Mollusca from Iceland and Scandinavia. Sarsia, 76, 53–124.
https://doi.org/10.1080/00364827.1991.10413466Wu, W.L. & Lee, Y.C. (2005) The Taiwan common mollusks in color. The Forestry Bureau, the Council of Agriculture, Taipei, 294 pp. [in Chinese]