Tricheurypon viride (Topsent, 1889)


Family : Raspailiidae

Form: Tricheurypon viride (Topsent, 1889) is a hairy greenish blue encrusting deep water sponge. It was originally described from the Caribbean, but subsequently reported from the Azores and the Mediterranean, and also from SW Ireland. It is doubtful whether the reported specimens all belong to one and the same species, but in the absence of contradictory evidence we maintain the present name.

Colour: Blue green or yellowish green, shallow water specimens yellow.

Surface: Strongly spined surface due to tylostyles projecting 2 mm beyond the ectosome.

Internal characters

Skeleton: Tylostyles and acanthostyles erect on the substratum. Trichodragmas scattered in the ectosomal region.

Spicules: Megascleres : Tylostyles up to 2500 Ám; acanthostyles 85 Ám. Microscleres : Trichodragmata (which may be homologous with ectosomal spicules) 60-70 Ám.

Habitat: This species is usually found on deep water corals from 80-800 m depth. However in SW Ireland it has also been found on Serpula reefs in depths of only 1-3m.

Distribution: SW Ireland; Mediterranean, Azores, Caribbean.

Distribution Map: NBN map : National Biodiversity Network mapping facility, data for UK.

Identity: Externally this species is very similar to other Eurypon species. However the presence of trichodragmata distinguish this species from other encrusting Eurypon species.

Editors: Christine Morrow, Bernard Picton & Rob van Soest.

 Picton, B.E., Morrow, C.C. & van Soest, R.W.B., 2011. [In] Sponges of Britain and Ireland