SQUILLA​ ​​

CLASSIFICATION OF SQUILLA​

KINGDOM :- ANIMALIA (Multicellular eukaryotic organisms)

PHYLUM :- ARTHROPODA (Jointed appendages.)

CLASS :- CRUSTACEA (Exoskeleton thick, antennae 2 pairs, jaws 3 pairs.)

SUB-CLASS :- MALACOSTRACA (6 abdominal segments having body distinctly segmented.)

ORDER :- STOMATOPODA  (Abdomen broader than cephalothorax.)

FAMILY :- SQUILLIDAE

GENUS :- Squilla

GEOGRAPHICAL DISTRIBUTION

  • It is found in India, Gulf of Mexico and Southern coast of Florida.

HABIT AND HABITAT

  • Squilla is a large, marine crustacean, found in burrows in the sand or mud at the bottom of the sea. It is an active predatory form catching prey with powerful maxillipedes

SQUILLA

GENERAL CHARACTERSTICS OF SQUILLA

  • Body is whitish, semi-transparent and is differentiated in cephalothorax, thorax and abdomen measuring 25 cm in length.
  • Carapace is small, flat uncalcified and fused with only three thoracic segments leaving at least four uncovered. Rostrum covers anterior region. There are two free segments in the head bearing pedunculate eyes and antennules respectively.
  • Head appendages are bilobed eyes, antennules and antennae.
  • First five pairs of uniramous thoracic appendages serve as maxillipedes, the second being the largest, sub-chelate and raptorial. The dactylus is armed with teeth on the inner margin. There are no oostegites. 
  • Last three thoracic segments bear walking legs. 
  • Abdomen composed of 6 segments, is broader and elongated than cephalothorax. The first five abdominal segments with longitudinal ridges (carinae).
  • Abdomen has large and biramous pleopods. The first five pleopods have branchiae or gills attached to exopodites while the sixth pair of abdominal limbs form a tail fan with the telson. 
  • Heart is greatly elongated extending through the thoracic and abdominal regions. 
  • Larvae are pelagic and in their general form resemble the zoaea larva of crab.
SQUILLA

IDENTIFICATION

  • The animal contains whitish semi-transparent body and all above features, hence it is Squilla.

SQUILLA
SQUILLA
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