FIGURE 1 in New species of the genera Havelockia and Thyone (Echinodermata: Holothuroidea) and first record of T. crassidisca from the southwestern Atlantic Ocean

FIGURE 1. (A-D) Thyone crassidisca Pawson & Miller, 1981 (MZUSP 1353). (A) Specimen preserved in ethanol; (B) Calcareous ring; (C) Anterior portion of the calcareous ring after iodine treatment to show the subdivisions of the radial (R) and interradial plates (IR) (black arrow); (D) Posterior portion of the calcareous ring after iodine treatment to show the subdivisions of posterior processes (white arrow). Scale bars: A, 5 mm. B–D 0,5 mm.