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(Buccich, 1886)

Species Overview

Stelletta hispida (Buccich, 1886) is a massive, occasionally cup-shaped, coarsely hispid sponge. It is basically white but often covered with sand and epifauna. It is a Mediterranean species recorded from the Atlantic coasts of Spain and Portugal.

Taxonomic Description

Colour: White, grey or yellowish white (but often obscured by foreign objects); cortical region may be violet.
Shape, size, surface and consistency: Massive-subglobular, occasionally forming thick-walled irregular cups. Surface strongly hispid. Consistency hard and firm.
Spicules: Megascleres: Oxeas, robust, numerous: 500-2000 x 40-50 µm; plagiotriaenes with thick clads, rhabdome: 1200-2000 x 40-65 m, clads 90-170 x 30-40 µm.
Microscleres: Chiasters with smooth cylindrical rays: 10 µm; oxyasters with conical rays: 15 µm.
Skeleton: Radiate arrangement, with plagiotriaenes concentrated at the surface mixed with oxeas. Oxeas protruding beyond the surface causing the surface hispidation. Microscleres scattered among the megascleres and at the surface.
Ecology: On rocks and in caves in the sublittoral.
Distribution: Galicia, Mediterranean.
Type specimen information: No data.

Remarks

This species is similar to Stelletta grubii but differs in having plagiotriaenes instead of orthotriaenes; the microscleres tend to be a bit smaller.
Source: Solórzano and Babio, 1989.

Stelletta hispida