Pseudostichopus

Théel, 1886

12 species

Body cylindrical or slightly flattened on ventral side, which does not form a ventral sole and is usually not separated from the dorsal side by a marginal brim. Mouth subterminal; tentacles 16-20. Tube feet very small and numerous, often apparently double or triple, usually concealed by the close coat of foreign bodies; sponge spicules, etc. Retractor muscles developed in the posterior end of the four pairs of ambulacra, not on the mid-ventral. To these it is due that the posterior end is usually contracted by preservation, forming a longitudinal furrow at the ventral end of which the anus is situated. Calcareous deposits rare or absent.Gonads on both sides of the dorsal mesentery. (Mortensen, 1925)