External characters

massive, forming long, thick ridges.

Colour

purple in life; purple in ethanol; appears mottled.

Skeletal Characters

Oscules	aligned apically along ridges; large, slightly raised in life; collapse in ethanol, appear as closed, very small openings, with raised lips, forming small, hard projections.
Texture	firm, incompressible.
Surface_Ornamentation	smooth, undulating, except where oscules present.
Ectosomal_Skeleton	dense palisade of smaller tylostyles.
Choanosomal_Skeleton	large canal systems visible in subectosomal region; choanosomal megascleres form large, dense meshes; microscleres present at ectosome and throughout choanosome.
Megascleres	subtylostyles: rounded tips, 2 size classes.
Microscleres	spirasters.
Mudmap_Author	P Sutcliffe
Mudmap_Editor	Kathryn Hall

Distribution

In French Polynesia: very large distribution in Marquesas archipelago.

Ecology and habitat

On rocky slope.