CLASSIFICATION OF HELIOPORA

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

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

SUB-CLASS :- OCTOCORALLIA (Skeleton of calcareous fibres.)

ORDER :- CEONOTHOCELIA (Solenial tubes present. )

FAMILY :- HELIOPORIDAE

GENUS :- Heliopora

GEOGRAPHICAL DISTRIBUTION

  • It is found on coral reefs in the Indo-Pacific ocean.

HABIT AND HABITAT

  • Heliopora is a marine sedentary coral.

HELIOPORA

GENERAL CHARACTERSTICS OF HELIOPORA

  • Heliopora is the only blue coral among the coral reefs.
  • It has a massive calcareous skeleton, composed not of spicules but of crystalline fibres of arragonite fused into lamellae. 
  • Skeleton is perforated by closely set cylindrical cavities of 2 kinds : (i) larger ones occupied by lower ends of polyps; and (ii) much more abundant smaller ones occupied by erect solenial tubes. 
  • Surface contains flat coenenchyme, which contains solenial network connected to middle region of the polyp and also with erect solenial tubes.
  • Polyps and solenia are pushed upwards by the formation of calcareous partitions. 
  • Blue colour is due to the iron salts.
  • Iron salts are concealed in life by the brown colour of the polyps. 
  • Heliopora have been found to exist since Cretaceous period. 
  • Vertical section shows mouth of expanded polyp having pinnately branched tentacles and theca.
HELIOPORA

IDENTIFICATION

  • The skeleton contains vertical solenial tubes and all above characters and hence it is Heliopora.

HELIOPORA
HELIOPORA
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