Prosuberites sp (1680) - Societe - Raiatea

Prosuberites sp. (OTU QM1680) OTU QM1680

Agelasida Hymerhabdiidae

External characters

thinly encrusting.

Colour

bright orange-yellow in life; beige-fawn in ethanol.

Skeletal Characters

Oscules small, <1 mm (d), conspicuous over surface in ethanol.
Texture soft, compressible, resilient, easily torn.
Surface_Ornamentation smooth, yet velvety, microhispid.
Ectosomal_Skeleton not well distinguished from choanosome; surface penetrated by points of tylostyles.
Choanosomal_Skeleton vaguely radiating architecture; spicules emanante from basal layer of spongin; basal layer very dense; long tylostyles with heads embedded in spongin layer, radiate away from base, arranged perpendicular to basal layer; smaller tylostyles disorganised; pigment granules scattered throughout; incorporates small amount of detritus (diatoms, foreign sigmas, microxeas).
Megascleres tylostyles: 2 classes
class 1: very large, ~1600 μm; ends sharply pointed, tyle blunt; tend to subtylote;
class 2: smaller, finer, ~400 μm; ends very sharply pointed, tyle large, well-rounded.
Microscleres nil.
Mudmap_Author K Hall
Mudmap_Editor K Hall

Distribution

In French Polynesia: archipelagos of the Society and Gambier

Ecology and habitat

In the lagoon, on hard substrate.