Dictyosphaeria cavernosa (Forsskål) Børgesen 1932

Division     Chlorophyta
Class     Ulvaphyceae
Order     Cladophorales
Family    Siphonocladaceae
Basionym     Ulva cavernosa Forsskål
SynonymValonia favulosa C.Ag.; Dictyosphaeria favulosa (C.Ag.) Decaisne ex Endlicher

    Thalli dark green, spherical, hollow, stiff-brittle structures 2-4 cm in diameter. Specimens slightly convoluted at maturation; and finally being basin-like because the original hollow plant ruptured. Thallus composed of large, polygonal cells, 1–2.5 mm wide, arranged in a single layer. Basal region of the mature thallus regenerate into numerous new, spherical thallus that are closely packed. Thallus attached by numerous, small hapteron cells produced by the basal cells 100 – 300 µm wide.


Epilithic on horizontal rock substrate during low tide level.

Distribution in India

Okha Port (Gujarat), Krusadii Island (Tamil Nadu), Andaman Islands.