| Habitat: attached to rock, covered with sand. | Habitat: in crevice between boulders, no sand. |
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| Colouration: live specimen dark brown dorsally with the ven- tral surface light brown to creamy-white with brown blotches. | Colouration: live specimens dark brown dorsally, with two rows of large dark brown spots; ventrally light yellowish with dark brown bands. |
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| Ossicles: | Ossicles: |
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| body wall tables with reduced, rounded or squarish disc with none or few marginal holes or marginal holes absent; spire reduced, hardly visible, with or without teeth; pseudo-buttons mostly incomplete, often twisted or with holes developed only on one side, rarely complete, sometimes slightly knobbed. | body wall tables with rounded disc with four distinct central and a several small marginal holes; spire of moderate height with about eight teeth; pseudo-buttons mostly complete, only few incomplete, always smooth. |
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| ventral podia with curved rods perforated by 1–7 holes at each end plus elongated plates surrounding end plate with two series of holes and an undulating margin, rarely margin serrated. | ventral podia with curved rods with 1–5 perforations at each end, elongated plates with a double series of holes and a smooth undulating margin, never serrate |
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| tentacle rods perforated at one end and branched at the other. | tentacle rods branched at ends, holes absent. |
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