CLASSIFICATION OF PTEROIDES

PHYLUM :- COELENTRATA OR CNIDARIA (Tissue grade, diploblastic and acoelomate. )

CLASS :- ANTHOZOA OR ACTINOZOA (Only polypoid generation. sedentary, solitary, colonial.)

SUB-CLASS :- OCTOCORALLIA (Polyps with 8 tentacles, bioluminescent.)

ORDER :- PENNATULACEA (Colony dimorphic with a long axial polyp and many lateral polyps.)

FAMILY :- PENNATULIDAE (Each leaf with single row of anthocodia. Highly evolved family.)

GENUS :- Pteroides

GEOGRAPHICAL DISTRIBUTION

  • Common in Europe.

HABIT AND HABITAT

  • Pteroides is also sedentary colonial deep sea form embedded in sandy or muddy bottom.

PTEROIDES

GENERAL CHARACTERSTICS OF PTEROIDES

  • Commonly called as Sea pen.
  • Whitish fleshy body is composed of an elongated primary axial polyp and several secondary lateral polyps originating from it. 
  • Lateral polyps or branches of pinnules concentrated anteriorly which are very closely set together.
  • Pinnules contains several gastrozooids or siphonozooids or polyps or anthocodia. 
  • Peduncle is elongated and thickened.
PTEROIDES

IDENTIFICATION

  • The animal contains long peduncle, compact anterior pinnules and all above characters and hence it is Pteroides.

PTEROIDES
PTEROIDES
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