Calappa lophos

Family
   Genus
Calappidae Dana,1852
Calappa

Species Name : Calappa lophos (Herbst, 1782)

Identification Key

Length of carapace about two thirds of its width, free margins of clypeiform expansions cut into 6 teeth, Posterior border of carapace beaded and bounded on either side by an indistinct tooth.

Synonymy

Cancer lophos Herbst 1782, Krabben Und Krebse, vol. V. 1, p. 201, pl. 13, fig.77
Calappa lophos

De Haan 1837, Fauna Japonica, vol. V, p. 72, pl. 20, fig. 1.

Alcock 1896, J. Asiatic Soc. Bengal, vol. 65(2), p. 144

Pillai 1951, Bull. Central Ins. Travancore ii, p. 8

Chhapgar 1957, Marine Crabs of Bombay State, p. 6

Sakai 1976, Crabs of Japan and the Adjacent Seas, p. 129

Jeyabaskaran and Ajmal khan 2000, Brachyuran Crabs of Gulf of Mannar, p. 47, pl. 32 b




Habitat

Soft sandy substratum, 30-50 meters deep

Distribution

Tranzania, Persian Gulf, India, Sri Lanka, Thailand, Celebes, China, and Japan.

India

East and West Coast, Gulf of Mannar, Andaman & Nicobar islands.

Description

Carapace smooth, except for a few lumps anteriorly and a few scattered granules posteriorly. Its antero-lateral borders beaded and finely festooned. Its posterior border beaded and bounded on either side by a tooth. Clypeiform expansions nearly as broad as long. Outer part of the pterygostomian regions densely hairy. Front bifid, its least breadth equal to the breadth of the orbit, beyond the level of which it does not project. Margin of the transverse wing-like expansion of the distal end of the arm four lobed, the two anterior lobes each with a spine. Upper surface of wrist and outer surface of palm nearly smooth. Crest of palm deeply 6 or 7 toothed.

Remarks

In the young specimens, the carapace is traversed longitudinally in its anterior three-fourths, by 7 or 8 line of sharpish tubercles.