Bathyplotes

Östergren, 1896

24 species

Body flattened on ventral side, which forms a distinct sole, a more or less conspicuous fringe limiting it from the dorsal side. Skin rather thick. Mouth ventral. 15 to 10 tentacles. Tube feet well developed on ventral side but often lacking in mid-ventral radius; papillae on dorsal side. Deposits cruciform, with spire; C-shaped spicules may be present. Gonads on both sides of mesentery. (Mortensen, 1927)

Synallactinae with 15-20 tentacles; mouth ventral, anus dorsal. Body with sole-like ventral side, usually with marginal appendages; midventral ambulacrum naked or provided with a few feet; ventrolateral ambulacra with feet in a single row or more. Dorsally, papillae more or less distinctly in rows. Musculature in most cases undivided; genital ogans in two tufts; deposits; tables with cross shaped disc and a spire built up of 4 rods, usually with several cross beams. (Deichmann, 1930)