Leptochiton laurae Schwabe & Sellanes, 2010

Sirenko, Boris, 2015, Shallow and deep-sea chitons of the genus Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Lepidopleurida) from Peruvian and Chilean waters, Zootaxa 4033 (2), pp. 151-202 : 161-162

publication ID

https://doi.org/ 10.11646/zootaxa.4033.2.1

publication LSID

lsid:zoobank.org:pub:46694533-415A-4469-866E-B968502198A7

DOI

https://doi.org/10.5281/zenodo.5687233

persistent identifier

https://treatment.plazi.org/id/038887DA-BA1C-1C26-FF48-1094FE83FB9C

treatment provided by

Plazi

scientific name

Leptochiton laurae Schwabe & Sellanes, 2010
status

 

Leptochiton laurae Schwabe & Sellanes, 2010 View in CoL

( Figs 8 View FIGURE 8 A–C, 9–16)

Leptochiton cf. sykesi Sirenko & Gallardo 2005: 89 View in CoL [non Leptochiton sykesi View in CoL ( Sowerby III, 1903)] Leptochiton laurae Schwabe & Sellanes 2010: 37 View in CoL –41, Figs 1 View FIGURE 1 J, 4, 5A–D.

Type. Holotype ( ZSM Mol 20070760).

Type locality. Chile, off Concepcion, 36º22.19’S 73º43.36’W, 846 m.

Material examined. Chile. Near Valdivia, Punta Galera, 39º59’S 73º43’W, 450 m; Canal Concepcion, 50°30’S, 74°55’W (depth unknown); Magellan Strait and Beagle Channel. RV Victor Hensen, st. 1045, EBS, 54°51.8’S, 69°55.6’W, 210 m, 2 spms, 0 4.11.1994, leg. K. Linse; st. 1140, EBS, 54°54.9’S, 68°39.1’W, 310 m, 1 spm, 0 7.11.1994, leg. K. Linse; st. 1270, EBS, 54°55.17’S, 70°45.15’W, 135 m, 1 spm, 21.11.1994, leg. A. Brandt; RV Vidal Garmas, cruise 96, st. 41, AGT, 50°20.9’S, 74°49.3’W, 438 m, 3 spms, 25.10.1996; RV Vidal Garmas, cruise 97, st. 5, AGT, 53°03.6’S, 70°38.2’W, 88 m, 1 spm, 07.10.1997; South Orkney Islands. RV Evrika, cruise 22, dredge 18, 60°24’S, 46°09’W, 1200–1280 m, 1 spm, 0 9.02.1987, leg. I. Smirnov; dredge 32 60°28’S, 47°07.0’W, 285 m, 2 spms, 24.03.1987, leg. I. Smirnov; South Shetland Islands. RV Eltanin, cruise 6, st. 432, Blake trawl, 62°52’S, 59°27’W, 884–935 m, 2 spms, 07.01.1963; RV Polarstern, ANT XVII/3, st. 149, AGT, 62°30.00’S, 56°55.08’W, 911 m, 2 spms, 24.04.2000, leg. B. Sirenko; Kerguelen Islands, RV Skif, cruise 3, st. 170, 49°12.4’S, 68°23.5’E, 145–146 m, 2 spms, 4.1.1971, leg. A. Pushkin; RV Fiolent, cruise 2, st. 82, 47°57’S, 69°02’E, 175 m, 5 spms, 21.10.1972; Crozet Islands. RV Skif., cruise 6, st. 45, 45°42.3’S, 49°35’E, 520–545 m, 4 spms, 6.12.1970, leg. A. Pushkin.

Distribution. Chile from off Concepcion (36°22’S) southwards to the Magellan Strait and Beagle Channel, South Orkney, South Shetland, Kerguelen and Crozet Islands, 88–1200 m.

Remarks. The dorsal scales of this species are variable. The specimens from South Shetland Ids. ( Figs 9–11 View FIGURE 9 View FIGURE 10 View FIGURE 11 ) have dorsal scales without ribs, whereas the specimens from the Beagle Channel ( Figs12–15 View FIGURE 12 View FIGURE 13 View FIGURE 14 View FIGURE 15 ) have scales with or without rib. Moreover small specimens of L. laurae ( Fig.16 View FIGURE 16 ) are very similar to L. medinae . This species resembles Leptochiton sykesi ( Sowerby III, 1903) ( Figures 17–19 View FIGURE 17 View FIGURE 18 View FIGURE 19 ) and L. medinae by longitudinal rows of granules in the central areas of the intermediate valves and features of the radula. L. laurae differs from L. sykesi in the number of aesthete pores (3 in L. laurae and 5 in L. sykesi ), in having dorsal scales which are rarely smooth or have one rib (girdle densely covered by numerous dorsal scales with three ribs in L. sykesi ). Leptochiton laurae differs from L. medinae in the number of aesthete pores (3 in L. laurae and 5 in L. medinae ), and L. medinae has dorsal scales with 6 ribs. Additionally the valves are subcarinated in L. laurae vs. rounded in L. medinae , quincuncially arranged granules in the lateral areas vs. radiating rows of granules and smooth marginal scales vs. ribbed marginal scales in L. medinae .

ZSM

Bavarian State Collection of Zoology

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

Order

Lepidopleurida

Family

Leptochitonidae

Genus

Leptochiton

Loc

Leptochiton laurae Schwabe & Sellanes, 2010

Sirenko, Boris 2015
2015
Loc

Leptochiton cf. sykesi

Schwabe 2010: 37
Sirenko 2005: 89
2005
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