CLASSIFICATION OF STRONGYLOCENTROTUS

KINGDOM :- ANIMALIA (Multicellular eukaryotic organisms)

PHYLUM :- ECHINODERMATA (Coelomate, pentaradiate and spiny skinned animals with vascular system.)

SUB-PHYLUM :- ELEUTHEROZOA (Non-pedicellate and free-living.)

CLASS :-ECHINOIDEA (Body oval or spherical and composed of test)

SUB-CLASS :- REGULARIA OR ENDOCYCLIA (Periproct and peristome, aboral and oral respectively.)

ORDER :- ECHINOIDA (Simultaneously possessing both an un-sculpted test and a feeding lantern with large plates fused across the top of each pyramid)

GENUS :- Strongylocentrotus

GEOGRAPHICAL DISTRIBUTION

  • It is found in Europe, Asia, Pacific coast, Mexico to Alaska and U.S.A.

HABIT AND HABITAT

  • Strongylocentrotus is a marine and regular echinoid, adapted for swimming life.

STRONGYLOCENTROTUS

GENERAL CHARACTERSTICS OF STRONGYLOCENTROTUS

  • Strongylocentrotus is a genus of sea urchins in the family Strongylocentrotidae containing several species.
  • Body is rounded and contains large tubercles for thick spines. Test is differentiated into oral and aboral surfaces.
  • Oral surface has a central mouth through which teeth of jaw apparatus (Aristotle’s lantern) project.
  • Mouth is surrounded by peristomial membrane. 
  • Aboral surface is composed of calcareous plates. It is differentiated into ambulacral and inter-ambulacral zones. 
  • Ambulacral grooves are absent. Several tube feet are seen in ambulacral zone. Test contains openings for tube feet in ambulacral zone. 
  • Anus is aboral.
  • Gemmiform pedicellariae are rounded and without teeth. 
  • Gills and sphaeridia are present. Development includes echinopluteus larva
STRONGYLOCENTROTUS

IDENTIFICATION

  • The animal contains brightly coloured spines and all above features, hence it is Strongylocentrotus.

STRONGYLOCENTROTUS
STRONGYLOCENTROTUS
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