Leptochiton consimilis Sigwart & Sirenko, 2012

Sirenko, Boris, 2018, Taiwanese deep-water chitons (Mollusca: Polyplacophora) and survey of chiton fauna of Taiwan, Zootaxa 4422 (3), pp. 301-344: 313

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Leptochiton consimilis Sigwart & Sirenko, 2012


Leptochiton consimilis Sigwart & Sirenko, 2012 

( Figs 11 View Figure , 12 View Figure , 36E, F View Figure )

Leptосhitоn соnsimilis Sigwаrt & Sirenko 2012: 13, figs 4 View Figure А, 5, 6.

Type material. Holotype ( MNHNAbout MNHN 23691) and 1 paratype ( MNHNAbout MNHN 23692).

Type locality. Solomon Islands, 7°43.3´S, 157°39.4´E, 930–977 m; SALOMON 2 stn. CP2216.GoogleMaps 

Material examined. East coast of Taiwan, N/O Fishery Researcher 1,” TAIWAN 2000”, stn CP53, 24°15.7’N, 122°11.6’E, 2620 m, 2 spms, BL 7.5–9.0 mm, 0 3.08.2000.

Distribution. Solomon Islands (912–1218 m: Sigwart & Sirenko 2012) and Taiwan (2620 m). Found living and feeding on sunken terrestrial plant remains. This find off Taiwan extends the distribution and depth of this species considerably.

Remarks. The studied specimen (BL 9.0 mm) has 5 gills per side ranging from valve VII to anus. The radula of the specimen studied is 3.9 mm long with 43 transverse rows of mature teeth. All elements of shell, girdle, gills and radula are similar to elements of the holotype. The only differences is the almost straight postmucronal slope (vs. concave in the holotype). It is interesting to note that the studied specimen had about ten very small single bryozoans hanging down in the pallial groove like the bryozoan Pseudobathyalozoon profundum d’Hondt, 2006 attached to Nierstrasziella andamanica ( Smith, 1906) from the Philippines and Solomon Islands (Sigwart 2009b). The gut contained terrestrial plant remains.


Museum National d'Histoire Naturelle