Homalopoma cf. sangarense ( Schrenck, 1861 )

Jirapatrasilp, Parin, Cuny, Gilles, Kocsis, László, Sutcharit, Chirasak, Ngamnisai, Nom, Charoentitirat, Thasinee, Kumpitak, Satapat & Suraprasit, Kantapon, 2024, Mid-Holocene marine faunas from the Bangkok Clay deposits in Nakhon Nayok, the Central Plain of Thailand, ZooKeys 1202, pp. 1-110 : 1-110

Homalopoma cf. sangarense ( Schrenck, 1861)

Figs 3 F , 5 B

cf. Turbo sangarensis Schrenck, 1861: 409 – 410 . Type locality: the Sangaric strait near the shore of the island of Jesso [Sangar (Tsugaru) Strait, Hakodate Bay, Hokkaido, Japan].

cf. Homalopoma sangarense . Habe 1958: 5, pl. 2, fig. 1. Golikov and Kussakin 1978: 65 – 66, fig. 40 a, b. Egorov 2000: 66, with in-text fig. Kantor and Sysoev 2006: 42, pl. 18 h. Lebedev 2014: 57.

Referred material.

CUF - NKNY - G 24 (1 shell; Figs 3 F , 5 B ).

Habitat.

On silty-sandy or rarely on rocky substrates at a depth from 2 to 22 m ( Egorov 2000; Kantor and Sysoev 2006).

Distribution.

Sea of Japan and southern Kuril Islands ( Kantor and Sysoev 2006; Lebedev 2014).

Record in Thailand.

This is the first record of this species in Thailand.

Taxonomic remarks and comparisons.

Although there is only one incomplete specimen, it is tentatively identified as H. sangarense based on shell size and shape and several strong spiral cords on the surface as in the descriptions and figures in Habe (1958), Golikov and Kussakin (1978), and Egorov (2000).

Subclass Neritimorpha Golikov & Starobogatov, 1975

Order Cycloneritida Frýda, 1998

Superfamily Neritoidea Rafinesque, 1815

Figures

Figure 3. Size comparison of coral and gastropods found in this study A Oulangia cf. stokesiana B Neripteron violaceum C Nerita articulata D Natica stellata E Natica vitellus F Homalopoma cf. sangarense G Eunaticina papilla H Ergaea walshi I Pirenella incisa J Scalptia scalariformis K Telescopium telescopium L Merica elegans M Cerithidea obtusa N Bufonaria rana O Nassarius micans P Nassarius siquijorensis Q Paratectonatica tigrina.

Figure 5. Coral and gastropods A Oulangia cf. stokesiana B Homalopoma cf. sangarense C Neripteron violaceum D Nerita articulata E Cerithidea obtusa F Pirenella incisa G Telescopium telescopium.