Anadara inaequivalvis ( Bruguière, 1789 )

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

Anadara inaequivalvis ( Bruguière, 1789)

Figs 11 D , 13 D

Arca inaequivalvis Bruguière, 1789: 106 – 107. Type locality: East India. Reeve 1844: Arca, pl. 8, sp. 54.

Scapharca inaequivalvis . Tantanasiriwong 1979: 4. Morris and Purchon 1981: 322. Nateewathana et al. 1981: 63. Poutiers 1998 a: 152, with in-text figs. Subba Rao and Dey 2000: 205. Robba et al. 2002: 58 – 59, pl. 2, fig. 8. Robba et al. 2003: tables 4, 5. Robba et al. 2007: 83 (appendix). Nabhitabhata 2009: 294. Negri et al. 2014: table 3. Okutani 2017: 1168, pl. 468, fig. 3. Yang et al. 2017: 148, fig. 580.

Anadara (Scapharca) inaequivalvis . Vongpanich 1996: 182, figs 21 – 23. Aungtonya et al. 1999: 372. Dharma 2005: 242, pl. 96, fig. 10. Dey and Ramakrishna 2007: 151, 174. Huber 2010: 137, with in-text fig. Huber 2015: C 3218.

Anadara cf. inaequivalvis . Swennen et al. 2001: 44, 65 – 66, fig. 29.

Anadara inaequivalvis . Hylleberg and Kilburn 2003: 148. Poppe 2010 a: 474, pl. 928, figs 5, 6. Sanpanich 2011: table 2. Gopalakrishnan et al. 2012: 59. Surakiatchai et al. 2018: table 6, pl. 3, fig. 1 a, b. Tudu et al. 2018: table 1. Tudu et al. 2019: 38 – 40, fig. 3 c – e. Wells et al. 2021: 52.

Referred material.

CUF - NKNY - B 03, B 21 (21 L + 30 R shells; Figs 11 D , 13 D ).

Habitat.

Sandy and muddy bottoms in intertidal and upper sublittoral zones ( Robba et al. 2002; Huber 2015).

Distribution.

Red Sea to India Ocean; Indo-West Pacific, from Japan to Australia as well as from Mediterranean and Black Sea ( Robba et al. 2002; Tudu et al. 2019). Records of fossils from the Late Miocene and Pliocene in Indonesia and from the Holocene in Thailand ( Robba et al. 2002; Surakiatchai et al. 2018).

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 Poutiers (1998 a) and Tudu et al. (2019), specifically in having an inflated, inequilateral, and roughly quadrate shell shape with 30–37 radial ribs.

Figures

Figure 11. Gastropods and bivalves A Architectonica perdix B Ellobium aurisjudae C Cassidula nucleus D Anadara inaequivalvis E Anadara indica F Tegillarca granosa.

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.