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Carter, 1871a

Species Overview

Trichogypsia villosa Carter (1871a) is a whitish, thinly encrusting, calcareous sponge, with several prominent oscules. It is unusual and characteristic in having only spined oxeas as spicules; no tri-or quadriradiate spicules. It has been recorded only from deeper water in the North Atlantic.

Taxonomic Description

Colour: White, grey-white or greenish white.
Shape, size, surface and consistency: Thinly encrusting, making rounded or irregular patches, up to 4 cm in widest expansion, 3 mm in thickness. Surface slightly honeycombed, slightly hispid. Up to 6 oscules. Consistency fragile.
Spicules: Calcareous. Exclusively oxeas, fusiform, irregular in outline, partly spined distally or provided with long hair-like outgrowths: 200-500 x 10-20 µm.
Skeleton: Leuconoid arrangement; oxeas scattered in the wall surrounding the atrial cavities.
Ecology: Deeper water, from the Laminaria zone down to 225 m.
Distribution: North Sea coast of England, Norway.
Etymology: villosus (Latin) = hairy.
Type specimen information: No data.

Remarks

Through its spiculation of exclusively oxeas this is an easily recognizable sponge.
Source: Arndt, 1935

Trichogypsia villosa