Thalassina sp.

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

Thalassina sp.

Figs 13 I , 17 D

Referred material.

CUF - NKNY - O 09 (130 pieces; Figs 13 I , 17 D ).

Habitat.

Littoral and sublittoral zones, mangrove swamps and forests, and edges of estuaries ( Ngoc-Ho and de Saint Laurent 2009).

Distribution.

Indo-West Pacific, from Japan to Australia ( Hyžný and de Angeli 2022). Records of fossils from the Miocene to Holocene in Indo-West Pacific, and from the Oligocene in Italy ( Hyžný and de Angeli 2022).

Taxonomic remarks and comparisons.

These specimens are assigned to Thalassina based on descriptions in Ngoc-Ho and de Saint Laurent (2009), Sakai and Türkay (2012), and Hyžný and de Angeli (2022), specifically in having a subchelate pereiopod 1 with its propodus having dorsomesially tuberculated or spinuous carinae. There is a total of 13 species within this genus ( Hyžný and de Angeli 2022), in which three species, T. anomala (Herbst, 1804) , T. gracilis Dana, 1852 , and T. squamifera De Man, 1915 , are recorded from Thailand ( Ngoc-Ho and de Saint Laurent 2009; Sakai and Türkay 2012) (but see the comment on the record of T. squamifera in Thailand in Moh et al. (2013)). However, the pereiopod 1 observed in our specimens is shorter and has a more quadrate shape. The dactylus that has a hooked tip is nearly as long as the fixed finger, suggesting an as yet unidentified species.

Class Thecostraca Gruvel, 1905

Subclass Cirripedia Burmeister, 1834

Order Balanomorpha Pilsbry, 1916

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 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.