Standella pellucida ( Gmelin, 1791 )

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

Standella pellucida ( Gmelin, 1791)

Figs 13 B , 15 D

Mactra pellucida Gmelin, 1791: 3260 – 3261. Type locality: “ Guinea coast. ” Sanpanich 2011: table 2.

Standella pellucida . Lynge 1909: 224. Nabhitabhata 2009: 418. Huber 2010: 451, with in-text figs. Huber 2015: C 22028. Tudu et al. 2018: table 1. Wells et al. 2021: 42.

Meropesta pellucida . Bosch et al. 1995: 248, fig. 1100. Poutiers 1998 a: 281, with in-text figs. Swennen et al. 2001: 47, 83, text-fig. 116, fig. 116. Robba et al. 2002: 91 – 92, pl. 12, fig. 6. Dey and Ramakrishna 2007: 211. Robba et al. 2007: 86 (appendix). Meyer et al. 2008: tables 2, 3. Nabhitabhata 2009: 417. Wong 2009: 289, figs 9 a, b, 22. BEDO 2017 a: 155. Yang et al. 2017: 196, fig. 752.

Referred material.

CUF - NKNY - B 30 (1 L + 1 R shells; Figs 13 B , 15 D ).

Habitat.

Fine sand and mud in intertidal zones down to 4 m depth, in lagoons, and at the fringe of mangrove areas ( Poutiers 1998 a; Huber 2015).

Distribution.

Arabian Gulf and Indian Ocean; Indo-West Pacific, from Japan to Australia ( Bosch et al. 1995; Wong 2009; Huber 2015). Records of fossils from the Quaternary in Indonesia and from the Holocene in Thailand ( Robba et al. 2002).

Record in Thailand.

Gulf of Thailand and Andaman Sea ( Wells et al. 2021).

Taxonomic remarks and comparisons.

This species is recognised based on the descriptions and figures in Robba et al. (2002) and Huber (2010), specifically in having a longer than high, inequilateral, and elliptical shell with an oval-shaped anterior margin and a somewhat pointed posterior margin, an outer surface sculptured with uneven and fine growth markings, and faint posterior radial striation. An exceedingly shallow radial depression is sometimes observed in the mid-anterior part. Huber (2015) indicated that the type locality in Guinea is erroneous.

Superfamily Tellinoidea Blainville, 1814

Figures

Figure 13. Size comparison of bivalves and other invertebrates found in this study A Placuna placenta B Standella pellucida C Geloina bengalensis D Anadara inaequivalvis E Pegophysema bialata F Megabalanus cf. tintinnabulum G Cultellus maximus H Lutraria complanata I Thalassina sp. J Tellinides conspicuus.

Figure 15. Bivalves A Pegophysema bialata B Geloina bengalensis C Lutraria complanata D Standella pellucida E Tellinides conspicuus F Joannisiella oblonga.