Variation in the heads of Thuridilla cf. gracilis at Koh Tao. Specimens 14 mm (A), 18 mm (B), 9 mm (C), 16 mm (D).

  Part of: Mehrotra R, Caballer GutiĆ©rrez MA, Scott CM, Arnold S, Monchanin C, Viyakarn V, Chavanich S (2021) An updated inventory of sea slugs from Koh Tao, Thailand, with notes on their ecology and a dramatic biodiversity increase for Thai waters. ZooKeys 1042: 73-188.