Paratapes undulatus ( Born, 1778 )

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

Paratapes undulatus ( Born, 1778)

Figs 12 Q , 16 B

Venus undulata Born, 1778: 54 – 55. Type locality: unknown.

Tapes (Paratapes) undulatus . Lynge 1909: 237.

Paphia undulata . Tantanasiriwong 1979: 13. Morris and Purchon 1981: 326. Nateewathana et al. 1981: 67. Dheeradilok et al. 1984: pl. 2, fig. 13. Oliver 1992: 191, pl. 43, fig. 6 a, b. Bosch et al. 1995: 273, fig. 1227. Nateewathana 1995: 111, with in-text fig. Poutiers 1998 a: 339, with in-text figs. Aungtonya et al. 1999: 382. Subba Rao and Dey 2000: 283. Swennen et al. 2001: 49, 95, text-fig. 198, fig. 198. Hylleberg and Kilburn 2003: 217. Dharma 2005: 270, pl. 110, fig. 16; 368, pl. 149, fig. 13. Thach 2005: 300, pl. 90, fig. 3. Dey and Ramakrishna 2007: 160, 244 – 245. Nabhitabhata 2009: 492. Poppe 2010 c: 296, pl. 1143, figs 7 – 9. Sanpanich 2011: table 2. Okutani 2017: 1248, pl. 543, fig. 4. Yang et al. 2017: 232, fig. 871. Surakiatchai et al. 2018: table 6, pl. 5, fig. 4 a, b.

Paphia cf. undulata . Aungtonya and Hylleberg 1998: 320.

Paphia (Paphia) undulata . Gemert 2003: 109. Robba et al. 2002: 113, pl. 18, fig. 8 a, b. Robba et al. 2003: tables 1, 3 – 5. Robba et al. 2007: 88 (appendix). Negri et al. 2014: table 3.

Neotapes undulata . Sartori et al. 2008: 115, table 1, figs 4 l, 5 l.

Paphia (Neotapes) undulata . Huber 2010: 423, with in-text fig.

Paratapes undulatus . Huber 2015: C 19932. Tudu et al. 2018: table 1. Wells et al. 2021: 47.

Paratapes undulata . BEDO 2017 a: 281, with in-text fig.

Referred material.

CUF - NKNY - B 12 (2 L shells; Figs 12 Q , 16 B ).

Habitat.

Fine sandy sediments and mud as well as silty clay bottoms in intertidal to subtidal zones at a depth of 1–50 m ( Huber 2015).

Distribution.

Red Sea and Indian Ocean; Indo-West Pacific, from Japan to Australia ( Robba et al. 2002; Huber 2015). Records of fossils from the Late Miocene to Holocene in Indonesia, Japan, the Philippines, Taiwan, and Thailand ( Robba et al. 2002; Dharma 2005; Surakiatchai et al. 2018).

Record in Thailand.

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

Taxonomic remarks and comparisons.

Despite having no colour and patterns, the elongate-oval and inequilateral shell shape with growth lines as well as slightly oblique and somewhat undulating commarginal grooves on outer surface of the specimens conform to the characters of this species ( Robba et al. 2002; Huber 2010).

Placamen Iredale, 1925

Figures

Figure 12. Size comparison of bivalves, scaphopod and other invertebrates found in this study A Tegillarca nodifera B Volachlamys singaporina C Tegillarca granosa D Noetiella pectunculiformis E Magallana cf. gigas F Estellacar olivacea G Anadara indica H Dentalium variabile I Siliqua minima J Corbula fortisulcata K Fistulobalanus kondakovi L Placamen lamellatum M Martesia striata N Potamocorbula sp. O Jupiteria puellata P Saccella mauritiana Q Paratapes undulatus R Dosinia dilecta S Joannisiella oblonga T Temnotrema siamense U Pholas orientalis.

Figure 16. Bivalves A Dosinia dilecta B Paratapes undulatus C Placamen lamellatum D Corbula fortisulcata E Potamocorbula sp. F, G Martesia striata G showing the shells with burrow casts along with mangrove roots H Pholas orientalis I calcareous burrows of Teredinidae indet.