Leptochiton setiger ( Nierstrasz, 1905 )

Sirenko, B. I., 2023, Indonesian chitons of the genera Belknapchiton Sirenko, Saito et Schwabe, 2022 and Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Leptochitonidae), Ruthenica, Russian Malacological Journal 33 (2), pp. 79-94 : 91

publication ID

https://doi.org/ 10.35885/ruthenica.2023.33(2).4

DOI

https://doi.org/10.5281/zenodo.11172630

persistent identifier

https://treatment.plazi.org/id/1B1DC90A-E80D-0657-3BDC-FA0116EDFE8A

treatment provided by

Felipe

scientific name

Leptochiton setiger ( Nierstrasz, 1905 )
status

 

Leptochiton setiger ( Nierstrasz, 1905) View in CoL

Lepidopleurus (Pilsbriella) setiger Nierstrasz, 1905:11 View in CoL , pl. 1, fig. 7, pl. 3, figs 60–65.

Leptochiton (Pilsbryella) setiger View in CoL . – Kaas, Van Belle, 1985: 161, fig. 74, map 22.

Type material. Lectotype ( ZMA.MOLL.138607) designated by Kaas and Van Belle [1985], and 2 paralectotypes ( ZMA.MOLL.138606, ZMA. MOLL.138625) (see below).

Type locality. Indonesia, Strait of Makassar, 0°34.6’N, 119°8.5’E, 1301 m. ( Siboga, St. 88) The paralectotypes were found in the Sea Bali, 7°15’S, 115°15’.6’E, 289 m ( Siboga, St. 12).

Distribution. Only known from the type locality of the lectotype.

Remarks. Sirenko [2020] already discussed the composition of the type specimens of this species. A thorough study of the lectotype and two paralectotypes revealed their morphological heterogeneity. The two paralectotypes differ from the lectotype in the arrangement of granules on the central areas in quincuncialy and in the absence of chitinous silky hairs between the valves, the main feature of this species, which served as the basis for the description of the subgenus Pilsbryella Nierstrasz, 1905 . They most likely belong to the genus Nierstraszella Sirenko, 1992 for a number of morphological features: 1) arrangement of false tegmentum granules in a quincunx pattern, 2) subcarinated valves, 3) elongated dorsal spicules-scales, 4) a tridentate cusp of the major lateral tooth, which is typical for juvenile individuals of Nierstraszella [ Sirenko, 1992] and 5) the paralectotypes were found on a piece of sunken wood which is a very typical substrate for Nierstraszella. By the way, two species of chitons: Leptochiton longisetosus Sigwart et Sirenko, 2012 and L. dykei Sigwart et Sirenko, 2012 [Sigwart, Sirenko, 2012] have long silky intersegmental bristles very similar to the hairs described by Nierstrasz for Lepidopleurus (Pilsbryella) setiger .

ZMA

Universiteit van Amsterdam, Zoologisch Museum

Kingdom

Animalia

Phylum

Mollusca

Class

Polyplacophora

Order

Lepidopleurida

Family

Leptochitonidae

Genus

Leptochiton

Loc

Leptochiton setiger ( Nierstrasz, 1905 )

Sirenko, B. I. 2023
2023
Loc

Leptochiton (Pilsbryella) setiger

Kaas P. & Van Belle, R. A. 1985: 161
1985
Loc

Lepidopleurus (Pilsbriella) setiger

Nierstrasz H. F. 1905: 11
1905
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