The dermal denticles are small and overlapping, each bearing a median ridge and three marginal teeth.

The body is covered by small, slightly overlapping dermal denticles, which are leaf-shaped with a median ridge and three marginal teeth.

The body is densely covered by minute dermal denticles, each shaped like an arrowhead and bearing a median ridge.

The dermal denticles are small and overlapping, each with three-toothed crown that bears a median ridge.

The cross section may be faintly hexagonal from the effect of a median ridge on either flank, otherwise is tetragonal.

The venter has a median ridge aligned with diagonally elongated nodes.

The dermal denticles are small and overlapping, each with a median ridge and three marginal teeth on the crown.

The body is densely covered by small, overlapping arrowhead-shaped dermal denticles with a median ridge.

The dermal denticles are widely spaced, with three points and a median ridge.

Rhenonema has a high crest along the median ridge of its median dorsal plate.