Temnotrema siamense ( Mortensen, 1904 )

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

Temnotrema siamense ( Mortensen, 1904)

Figs 12 T , 17 G

Pleurechinus siamensis Mortensen, 1904: 79 – 82, pl. 1, figs 2, 7, 11, 20; pl. 2, figs 2, 9, 14, 15, 22; pl. 6, figs 16, 36; pl. 7, figs 14, 44, 53. Type locality: Koh Mesan, 3–15 fathoms; Koh Chuen, 15–38 faths.; Koh Kram, 20–30 faths.; Koh Kahdat, 10 faths.

Temnotrema siamense . Clark 1925: 92. Mortensen 1940: 45. Mortensen and Gislén 1940: 103. Mortensen 1943: 259 – 262, fig. 139. Clark and Rowe 1971: 155. Price 1981: 8. Liao 1998: table 1. Lane et al. 2000: 485. Samyn 2003: table 2. Marsh and Morrison 2004: tables 1, 2, 5. Gopalakrishnan et al. 2012: 32. Filander and Griffiths 2014: 53. Schultz 2015: 258, 263 – 264, fig. 4.169 b, c. Arachchige et al. 2017: table 3. Putchakarn 2018: 57, table 1. Arachchige et al. 2019: table 1. Köhler 2020: 9, 72 – 73, pl. 14, figs 11, 14. Mucharin and Sumitrakij 2022: 6, pl. 4, fig. 1.

Temnotrema siamensis . Putchakarn and Sonchaeng 2004: table 1.

Referred material.

CUF - NKNY - O 02 (23 shells; Figs 12 T , 17 G ).

Habitat.

Coarse and high energy subtidal sand from a depth of 5–350 m ( Price 1981; Schultz 2015).

Distribution.

Persian Gulf and Indian Ocean; Indo-West Pacific, from South China Sea to Australia ( Mortensen 1904; Price 1981; Schultz 2015; Arachchige et al. 2019).

Record in Thailand.

Gulf of Thailand and Andaman Sea ( Putchakarn and Sonchaeng 2004).

Taxonomic remarks and comparisons.

This species is recognised based on the descriptions and figures in Mortensen (1904), Clark and Rowe (1971) and Schultz (2015), specifically in having deep horizontal grooves in ambulacral and interambulacral plates and in lacking a horizontal series of tubercles.

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 17. Bivalves and other invertebrates A Cultellus maximus B Siliqua minima C Dentalium variabile D Thalassina sp. E Fistulobalanus kondakovi F Megabalanus cf. tintinnabulum G Temnotrema siamense.