Leptochiton laurae Schwabe & Sellanes 2010
Leptochiton cf. laurae Schwabe & Sellanes, 2010 (Figures 18–21, 44G, H) Leptochiton cf. sykesi Sirenko & Gallardo 2005: 89 [non Leptochiton sykesi (Sowerby III, 1903)] Leptochiton laurae Schwabe & Sellanes 2010: 37–41, Figs. 1J, 4, 5 A–D; Sirenko 2015: 161, figs. 8A–C, 9–16; Sirenko &...
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| Format: | Other/Unknown Material |
| Language: | unknown |
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Zenodo
2020
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| Online Access: | https://doi.org/10.5281/zenodo.4408166 http://treatment.plazi.org/id/03B2CD3FFFF70C1ABD992375CFD43EA4 |
| Summary: | Leptochiton cf. laurae Schwabe & Sellanes, 2010 (Figures 18–21, 44G, H) Leptochiton cf. sykesi Sirenko & Gallardo 2005: 89 [non Leptochiton sykesi (Sowerby III, 1903)] Leptochiton laurae Schwabe & Sellanes 2010: 37–41, Figs. 1J, 4, 5 A–D; Sirenko 2015: 161, figs. 8A–C, 9–16; Sirenko & Sellanes 2016: 264, figs. 1E, 9–11. Type material. Holotype (ZSM Mol 20070760). Type locality. Chile, off Concepcion, 36º22.19’S, 73º43.36’W, 846 m. Material examined. New Zealand, South Island, off Palliser Bay, 41°42.30’S, 175°9.00’E, F/ V Admiral, stn 1957083, 1006 m, 2 spm, BL 5.0–8.0 mm, (NMNZ M 012864), 17.02.1957; SW of Kaikoura Peninsula, upper Kaikoura Canyon, 42°29.00’S, 173°37.00’E, R / V Acheron, stn 1976545, 1006– 1097 m, mud, 1 spm, BL 11.0 mm, (NMNZ M 051009), 18.03.1976; South Island, SSE of Kaikoura, 42°49.90’S, 173°48.40’E, R / V James Cook, stn 1986020, 927– 995 m, 1 spm, BL 10.5 mm, (NMNZ M 319764), 10.05.1986; North Island, southern Kermadec Ridge, Rumble Volcano, 36°8.37’S, 178°1292’E, R / V Tangaroa, stn TAN0107/231, 1210– 1040 m, 1 spm, BL 13.5 mm, (NMNZ M 319773), 24.05.2001. Distribution. Off Chile, from 34.5°S to the Magellan Strait and Beagle Channel, South Orkney, South Shetland, Kerguelen and Crozet Islands and New Zealand, 88–1210 m. The present report near New Zealand of L . cf. laurae would greatly extend the previously known distribution of this species if confirmed. Remarks. The examined specimen (NMNZ M 051009, with BL 11.0 mm) has 11 gills per side arranged from valve VI to anus, and a 3.0 mm long radula with 30 transverse rows of mature teeth. The New Zealand material shows some differences to the holotype and to some specimens studied by Sirenko (2015) and Sirenko & Sellanes (2016). The examined specimen differs from the holotype by having 1 or 2 ribs on dorsal scales [vs. 6–8 very faint longitudinal ribs in the holotype (Schwabe & Sellanes 2010)]. In my opinion the number of ribs on dorsal scales is variable in this species. Specimens from South Shetland Islands were ... |
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