Leptochiton belknapi Dall, 1878

Sirenko, Boris & Sellanes, Javier, 2016, Update of the genus Leptochiton (Mollusca: Polyplacophora) in Chilean deep waters: three new reports and description of two new species, Zootaxa 4173 (3), pp. 259-279 : 262-264

publication ID	https://doi.org/10.11646/zootaxa.4173.3.5
publication LSID	lsid:zoobank.org:pub:8688AA5A-4B69-49A3-995E-65A8FD39F783
DOI	https://doi.org/10.5281/zenodo.3512170
persistent identifier	https://treatment.plazi.org/id/224687DD-FF9E-7F56-FF1C-7BE4A6B1FDF8
treatment provided by	Plazi (2016-10-05 06:52:21, last updated 2024-11-27 09:26:37)
scientific name	Leptochiton belknapi Dall, 1878
status

Treatment

Leptochiton belknapi Dall, 1878 View in CoL

( Figs 1 View FIGURE 1 A, B, 2–4)

Leptochiton belknapi Dall, 1878: 1 View in CoL ; Kaas & Van Belle, 1987: 23, fig.10; Schwabe & Sellanes, 2010: 33, fig.1L–M; Sirenko, 2015: 154 View Cited Treatment –155.

Leptochiton alveolus View in CoL ; Ferreira, 1979:152, fig 10 (in part, non Chiton alveolus M.Sars MS, Lovén, 1846); Kaas & Van Belle, 1985: 36, fig.14, map 6 (in part, non Chiton alveolus Lovén, 1846 ).

Leptochiton farallonis Dall, 1902: 557 View in CoL .

Leptochiton mesogonus Dall, 1902: 555 View in CoL . Leptochiton opacus Dall, 1908: 218 View in CoL .

Leptochiton View in CoL sp. Sellanes et al., 2004: 1066.

Type material. Holotype (USNM 30972).

Type locality. Off Western Aleutian Islands , 53°08’N, 171°19’W, 1840 m depth. GoogleMaps

Material examined. Holotype; off Chile, RV AGOR Vidal Gormáz, st. VG07-7, AGT-8, 36.0023°– 36.0058°S, 73.3841° – 73.3706°W, 922–1013 m depth, 2 spms ( ZISP 2274 View Materials ), BL— 18–20 mm, 07.10.2007; RV Melville st. INSPIRE, AGT-3_533 , 36.22523°S, 73.43115°W, 724 m, 4 spms (SCBUCN 4136), BL— 12–30 mm, 0 9.03.2010.

Distribution. Widespread species, inhabits the Pacific Ocean from off Pacific side of Hokkaido (40°12’N), the Sea of Okhotsk and Bering Sea and North and South America’s Pacific waters southwards to 42°40’S, at depth of 100 to 3724 m, based on SEM examination of 23 specimens from the mentioned areas.

Revised diagnosis. Animal of moderate size, elongate oval. Intermediate valves subcarinated. Tegmentum sculptured with small granules evenly arranged quincuncially. Each granule with one megalaesthete and two micraesthetes positioned in front of megalaesthete. Dorsal side of girdle densely covered with pointed scales with 2–4 ribs. Central tooth of radula short and wide, major lateral tooth with big, unicuspid head and very small denticle (also termed appendix) at inner edge. Fifteen gills per side ranging from valve VII to anus.

References

Kaas, P. & van Belle, R. A. (1985) Monograph of living chitons. Vol. 1. Order neoloricata: Lepidopleurina. E. J. Brill / W. Backhuys, Leiden, 240 pp.

Kaas, P. & van Belle, R. A. (1987) Monograph of living chitons. Vol. 3. Suborder Ischnochitonina: Ischnochitonidae: Chaetopleurinae, and Ischnochitoninae. E. J. Brill / W, Backhuys, 302 pp.

Dall, W. H. (1878) Description of new form of mollusks from Alaska contained in the collections of the National Museum. Proceedings of the United States National Museum, 1, 1 - 3. http: // dx. doi. org / 10.5479 / si. 00963801.1

Dall, W. H. (1902) Illustrations and descritions of new, unfigured, or imperfectly known shells, chiefly American in the U. S. National Museum. Proceedings of the U. S. national Museum, 24, 499 - 566. http: // dx. doi. org / 10.5479 / si. 00963801.24 - 1264.499

Dall, W. H. (1908) Report of the dredging operations off the West coast of Central America, to the Galapagos, etc … by the U. S. Fish. Comm. Steamer Albatross , 1891. 37, Reports on the scientific results. Etc. 14, The Mollusca and Brachiopoda. Bulletin of the Museum of comparative Zoology of the Harvard University, 43 (6), 205 - 287

Ferreira, A. J. (1979) Thee family Lepidopleuridae (Mollusca: Polyplacophora) in the eastern Pacific. Veliger, 22 (2), 145 - 165.

Loven, S. L. (1846) Index molluscorum litora Scandinaviae Occidentalia habitantium. Ofverssigt Af Kungel Svenska Vetenskaps-Akademiens Forhandlinger, 3, 134 - 160.

Schwabe, E. & Sellanes, J. (2010) Revision of Chilean bathyal chitons Mollusca: Polyplacophora) associated with cold-seeps, including description of a new species of Leptochiton (Leptochitonidae). Organisms Diversity & Evolution, 10 (1), 31 - 55. http: // dx. doi. org / 10.1007 / s 13127 - 009 - 0002 - 6

Sellanes, J., Quiroga, E. & Gallardo, V. A. (2004) First direct evidences of methane seepage and associated chemosynthetic communities in the bathyal zone off Chile. Journal of the Marine Biological Association UK, 84 (5), 1065 - 1066. http: // dx. doi. org / 10.1017 / S 0025315404010422 h

Sirenko, B. I. (2015) Shallow and deep-sea chitons of the genus Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Lepidopleurida) from Peruvian and Chilean waters. Zootaxa, 4033 (2), 151 - 202. http: // dx. doi. org / 10.11646 / zootaxa. 4033.2.1

Figures

FIGURE 1. Complete specimens of Leptochiton belknapi Dall, 1878. BL— 23 mm, RV Melville, st. INSPIRE, AGT- 3 _ 533, 724 m, SCBUCN 4136 (A, B), Leptochiton sigwartae Sirenko, 2015. BL— 33 mm, RV Sonne, st. SO- 156. 7176 - 5, 502 m, ZISP 2275 (C, D), Leptochiton laurae Schwabe & Sellanes, 2010. BL— 11,5 mm, RV Melville, st. INSPIRE, AGT- 2, 583. 497 – 574 m, ZISP 2276 (E, F), Leptochiton ibanezi sp. nov., holotype, BL— 21 mm, MNHNCL 400187 (G, H). A, C, E, G. Dorsal view; B, D, F, H. Lateral view. Scale bars 2 mm.