Scalptia scalariformis ( Lamarck, 1822 )

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

Scalptia scalariformis ( Lamarck, 1822)

Figs 3 J , 6 H

Cancellaria scalariformis Lamarck, 1822: 115. Type locality: unknown.

Cancellaria (Trigonostoma) scalariformis . Tesch 1915: 39, pl. 79, fig. 81 a, b.

Trigonostoma scalariformis . Cernohorsky 1972: 180, pl. 50, fig. 2, 2 a. Garrard 1975: 27 – 29, figs 4 (3, 4). Way and Purchon 1981: 320. Wilson 1994: 178, pl. 37, fig. 7 a, b.

Scalptia scalariformis . Verhecken 1986: 53 – 55, figs 28 – 35. Swennen et al. 2001: 57, 133, fig. 462. Hylleberg and Kilburn 2003: 101. Robba et al. 2004: 129 – 130, pl. 17, fig. 6. Dharma 2005: 134, pl. 42, fig. 12 a, b. Hemmen 2007: 277 – 278, with in-text figs. Robba et al. 2007: 93 (appendix). Okutani 2017: 1054, pl. 344, fig. 4. Yang et al. 2017: 102, fig. 415. Tudu et al. 2018: table 1. Wells et al. 2021: 121. Chan and Lau 2022: 1 – 2, figs 1 – 3.

Scalptia (Scalptia) scalariformis . Thach 2005: 188, pl. 58, figs 25, 27, 29.

Referred material.

CUF - NKNY - G 64 (1 shell; Figs 3 J , 6 H ).

Habitat.

Sand and muddy bottoms at a depth from 20 to 40 m in sublittoral zones ( Thach 2005; Okutani 2017; Yang et al. 2017).

Distribution.

Indian Ocean; Indo-West Pacific, from Japan to Australia ( Robba et al. 2004; Okutani 2017). Several records of fossils from the Pliocene to Holocene in the Indo-Pacific area, including Indonesia and Thailand ( Robba et al. 2004).

Record in Thailand.

Gulf of Thailand ( Wells et al. 2021).

Taxonomic remarks and comparisons.

This species differs from its similar species, Scalptia bicolor ( Hinds, 1843) , by having a higher and narrower body whorl and a less widely open umbilicus ( Robba et al. 2007).

Superfamily Buccinoidea 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 6. Gastropods A Eunaticina papilla B Natica stellata C Natica vitellus D Paratectonatica tigrina E Ergaea walshi F Bufonaria rana G Merica elegans H Scalptia scalariformis.