Actaea flosculata

Xanthidae MacLeay,1838
Actaeinae Alcock, 1898

Species Name : Actaea flosculata Alcock, 1898

Identification Key

Carapace, chelipeds and legs with pedicled, flat –topped tubercles which at the margins become petaloid; front bilobed, each lobe cut into four petaloid teeth.


Actaea flosculata Alcock 1898, J. Asiatic Soc. Bengal, vol. 67(II), p. 151.
Borradaile 1902, Fauna Geog. Maldive and Laccadive Archipel, p. 256.
Guinot 1971, Bull. Mus. Nat. Hist. Nat. Paris, vol. 42(5), p. 1071.
Maya Deb 1989, Records of Zoological Survey of India, Occasional paper. No. 117, p. 19.


Inhabits the crevices of rock or under stones, coral reefs.


India, Sri Lanka, and Maldives.


Lakshadweep islands.


Carapace sub-circular, three-fourth as long as broad, convex, well lobulated and divided by broad, deep, smooth grooves into regional lobules. The whole carapace, except the broader grooves between the regions, closely covered with very elegant tubercles, exactly like pin heads in appearance. The exposed surfaces of the chelipeds and legs are covered with ornaments similar to those on the carapace, except at the edges, where they become petaloid. Antero-lateral borders ornamented like the surface, obscurely lobed. Postero-lateral borders about equal in length to the antero-lateral straight. Fingers short, blunt pointed, slightly hollow at tip.


This species identical with A. fragifer (White) but the shape and lobular textural pattern of carapace, arrangements of the granules on the carapace and appendages are quite distinctive enough to separate both the species.