* Plocamopherus tilesii Bergh, 1877 Figure 16E

Material examined.

Two specimens 102 mm, TT.

Ecology.

Exclusively recorded from soft sediment habitats beyond the fringing coral reef. Depth 18-25 m.

Distribution.

Plocamopherus tilesii is known from Turkey ( Yokeş et al. 2012), Vietnam (Martynov and Korshunova 2012), the Philippines (Gosliner et al. 2008), Hong Kong (Jensen 2000), Japan (Nakano 2017), China (Gosliner and Vallès 2006), Australia (Nimbs and Smith 2016), and Korea (Song et al. 2017). Here documented as a first record for Thai waters.