Ypsilothuria bitentaculata bitentaculata (MZUSP 1306): (1) lateral view of the body; (2) detail of one of the two elongated lateral tentacles detail of the tentacle (white arrow); (3) dorsal view of a specimen preserved in ethanol (note oral and anal siphons, white and red arrows, respectively); (4) detail of the ossicles from the body wall (the red arrow indicates the spire); (5) calcareous ring. R, radial plate. IR, interradial plate. Scale bars: 1–3 = 5 mm, 4 = 1 mm, 5 = 0.5 mm.

  Part of: Martins L, Tavares M (2018) Ypsilothuria bitentaculata bitentaculata (Echinodermata: Holothuroidea) from the southwestern Atlantic, with comments on its morphology. Zoologia 35: 1-6. https://doi.org/10.3897/zoologia.35.e24573