Porcellana ornata   Stimpson  (Crab)
Organism information awaits expert curation
Class: Malacostraca

Size: 2-4 mm (male), 2.25-2.75 (non ovigerous female), 2.75-3.75 mm (ovigerous female).

Carapace as broad as long, sub-ovate, upper surface almost convex, regions well defined, those on anterior half of carapace especially, protogastric and hepatic regions demarcated by deep grooves, epigastric region slightly elevated, protogastric region divided into two lobes, inner lobe larger than outer; mesogastric and urogastric regions fused, cardiac region not distinctly differentiated. Front when viewed from the dorsal side appears biconvex but in the frontal view it is trilobed, the median lobe being strongly grooved and slightly deflexed; frontal and antennal margins minutely serrated, supra-orbital margin not provided with a median tooth above the eye. Lateral border armed with about 4-7 denticles and some minute serrations on the branchial region, no small tooth in front of outer protogastric lobe.
Antennule: First segment much longer than broad, with 3-4 prominent teeth on each angle of the dorsal plate, either side of the ventral tooth minutely serrated and so also the inner side of the tooth at the upper inner angle.
Antenna: Second segment broader than long, distally narrowed, upper distal end of third segment produced into a lobe; fourth segment short.
Chelipeds: Chelipeds sub-equal or almost equal, rather flat, dorsal surface provided with ridges and tubercles; merus with a large lobe bearing about 6 minute teeth; carpus oblong, quadrate, with 2 pronounced longitudinal ridges on dorsal surface, anterior margin almost straight, armed with 2-4 small teeth on the proximal lobe, rest of the margin being minutely serrated, posterior margin dentate; propodus much broader than one-half its length, provided with a rather prominent median ridge, on the outer side of which are round, large but flat tubercles, a few tubercles also present on the inner side, near the articulation of the dactylus; outer margin with delicate hairs.
Ambulatory legs: Hairy; merus rather stout, spinules on the outer margin more prominent than those on the posterior margin; carpus similarly but less distinctly spinulose, the distalmost spinules being large; propodus armed with 4 spinules on the posterior margin, 2 at the distal end and 2 on the border; dactylus with 4 spinules.
Telson: 7 jointed, antero-lateral plates very small, central one fairly large, medio-laterals narrowing posteriorly, postero-lateral ones rather longer than broad.

Synonym (s)
Porcellana ornata Stimpson, 1858
Porcellana sp. Gravely, 1927
Porcellana ornata Gordan, 1931

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Tamil Nadu, Krusadai Island INDIA
• Tamil Nadu, Shingle Island INDIA

Literature Source(s)
  • Sankolli, KN (1966) On the Porcellanidae (Crustacea-Anomura) of Ratnagiri along the west coast of India Proceedings of Symposium on Crustacea Marine Biological Association of India, Mandapam Camp Part-I 295-313 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org

Page last updated on:2010-11-12

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