Euthyonacta

Deichmann, 1954

1 species

Heavily built, thick skinned form with barrel shaped body, five heavy oral valves and tube feet scattered uniformly over the body, more papilliform on the dorsum and at the ends. Color in alcohol yellowish brown. Simple ring. Spicules an outer layer of deep baskets with a wreath of teeth along the rim and an inner layer of regularly knobbed buttons of varying size. Feet apparently without end plate, though a number of branched rods may substitute for such one; walls packed with heavy rods, often with a third arm. Introvert with rosettes and small buttons with almost smooth surface. Tentacles with strong, perforated rods, decreasing in size toward the tips. (Deichmann, 1954)