Pisidia spinulifrons   (Miers)  (Crab)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Malacostraca
Order:Decapoda
Family:Porcellanidae

Description
Size: 3.75-5 mm (male), 2-2.5 mm (non-ovigerous female), 3.5-4.75 mm (ovigerous female).

Color: Light brown with dark brown patches on carpus, merus and propodus of walking legs. On the carapace there were a few whitish longitudinal patches of more or less regular shape.

Carapace slightly convex, nearly smooth except for small striation with squamiform granules posteriorly on sides, glabrous with tufts of hairs here and there, anteriorly contracted and posteriorly rounded; lateral margin takes a little but sharp turn inwards at the lateral notch of carapace. 3-4 minute tubercles on the lateral notch, one or two slightly larger spinules on the inner side; 3 small sharp teeth on the lateral margin, of these one situated near about its middle, another near the tip of antero lateral margin and the last between these two; two small spines on the insertion of antenna and an additional one just behind the external angle of the orbit; front distinctly trilobed, triangular, margins minutely serrated; middle lobe largest, but not produced more than the others and a little deflexed and rounded downwards; epimeral regions slightly striated.
Antennule: First segment longer than broad, lateral margins nearly straight, almost parallel to each other, inner margin serrated at its distal portion, outer margin with hairs on the anterior half; upper plate strongly concave, its margin armed with 1-3 teeth on each of the four angles; 4-5 smaller teeth on the inner angle of the ventral surface.
Antenna: First segment much broader than high, upper surface depressed and its tip provided with three teeth, ventral margin minutely serrulated; second segment short with a small acuminate tooth at the distal end of upper margin; third segment with two comparatively smaller teeth on upper margin; fourth segment short.
Chelipeds: Unequal in both sexes; angle at extremity of merus prominent, sometimes minutely dentate with 2 large and 2 or 3 smaller teeth; anterior margin of carpus armed with 2 larger and 5 or 6 smaller teeth, distal angle of anterior margin not produced into an acute tooth, posterior margin armed with one tooth near its middle; palm with a median angular ridge, more or less prominent and obtuse; fingers twisted and pilose within.
Walking legs: Rather slender, sparsely hairy; carpus less than one fourth the length of propodus; propodus armed with 3 spinules on the posterior margin; dactylus with 5 spinules on posterior margin.
Telson: 7 jointed; much broader in the female than in male; distal joint of abdominal appendages spoon-shaped.


Synonym (s)
Porcellana spinulifrons Miers, 1879

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Coastal

Biogeography


• Maharashtra, Ratnagiri 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:2010-11-11

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