Leptochiton finlayi (Ashby, 1929)

Sirenko, Boris, 2020, New Zealand and Australian species of the genus Leptochiton (Mollusca Polyplacophora), Zootaxa 4851 (3), pp. 401-449 : 410-414

publication ID

https://doi.org/ 10.11646/zootaxa.4851.3.1

publication LSID

lsid:zoobank.org:pub:D5837E58-53D6-4C51-A5C0-C96A31F26BC4

DOI

https://doi.org/10.5281/zenodo.4486600

persistent identifier

https://treatment.plazi.org/id/03B2CD3F-FFEE-0C07-BD99-21EDCD7F3B63

treatment provided by

Plazi

scientific name

Leptochiton finlayi (Ashby, 1929)
status

 

Leptochiton finlayi (Ashby, 1929) View in CoL

( Figures 10–13 View FIGURE 10 View FIGURE 11 View FIGURE 12 View FIGURE 13 , 45B View FIGURE 45 )

Lepidopleurus finlayi Ashby 1929a: 367 View in CoL , pl. 32: figs. 57 (nom. nudum); 1929b: 372; Beu 1977: 37, fig. G.

Terenochiton finlayi ; Iredale & Hull 1930: 157, pl. 16: figs. 2–5; Powell 1979: 21.

Leptochiton (Leptochiton) finlayi View in CoL ; Kaas & Van Belle 1985: 159, fig. 72, map 28.

Leptochiton finlayi View in CoL ; Beu & Maxwell 1990: 330, pl. 43, figs. a, c, e (holotype).

Type material. Holotype ( AM C95165). Type locality. New Zealand, off Otago Heads , 108 m.

Material examined. New Zealand, North Island , 33°9’50’’S, 173°47’20’’E, 141 m, 3 spms, BL 5–7 mm, ( NMNZ M.283635) 20.02.1989 GoogleMaps , leg. R. Stewart ; Head of Pegasus Canyon, Pegasus Bay, R / V Acheron, stn 1976558, 446 m, mud, 1 spms, BL 6.0 mm, ( NMNZ M 328331 View Materials ), 27.09.1976 ; N of Cavalli Islands , 34°52.75’S, 173°55.03’E, R / V Tangaroa, stn TAN0906/ 81, 115 m, 1 spm, BL 8.0 mm, ( NMNZ M 314504 View Materials ), 08.07.2009 GoogleMaps .

Distribution. All around New Zealand and Stewart Island, from 115 to 446 m. There is a fossil occurrence of this species in the Pleistocene of New Zealand ( Beu & Maxwell 1990).

Remarks. Two specimens were studied by SEM: a specimen with a BL of 7.0 mm (NMNZ M.283635) and a specimen with BL 6.0 mm (NMNZ M 328331). The specimen with BL 7.0 mm has 9 gills per side arranged from valve VI to the anus and a radula 3.1 mm long with 29 transverse rows of mature teeth. The second specimen differs from the first one by having dorsal scales with 5–7 ribs instead 5–9 ribs. These specimens are characterized by having subcarinated valves, longitudinal rows of granules in central areas of intermediate valves and in the antemucronal area of the tail valve, radial rows of granules on the head valve and granules arranged in a random manner in other areas, 9 aesthetes on each granule, sutural tufts of 13–14 long needles, dorsal scales with 5–9 narrow longitudinal ribs, marginal elements of three kinds: long, smooth needles, long ribbed spicules and short flattened spicules with ribs on both sides, central teeth of radula short and wide, major lateral teeth with bidentate sharply pointed cusps, inner denticle much smaller than outer one. As noted by Kaas & Van Belle (1985) “at the posterior margin of the lateral areas, there are three or more equi-spaced protuberances standing up about four times the height of the larger grains, a most characteristic feature of this species.”

AM

Australian Museum

NMNZ

Museum of New Zealand Te Papa Tongarewa

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

SubClass

Neoloricata

Order

Lepidopleurida

Family

Leptochitonidae

Genus

Leptochiton

Loc

Leptochiton finlayi (Ashby, 1929)

Sirenko, Boris 2020
2020
Loc

Leptochiton finlayi

Beu, A. G. & Maxwell, P. A. 1990: 330
1990
Loc

Leptochiton (Leptochiton) finlayi

Kaas, P. & Van Belle, R. A. 1985: 159
1985
Loc

Terenochiton finlayi

Powell, A. W. B. 1979: 21
1979
Loc

Lepidopleurus finlayi

Ashby, E. 1929: 367
1929
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