CLASSIFICATION OF DIPHYES

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

CLASS :-  HYDROZOA  (The hydroids and craspedote medusa )

ORDER :- SIPHONOPHORA (Polymorphic colonies without perisarc.)

SUB-ORDER :- CALYCOPHORA (The colony consists of one or more swimming bells.)

GENUS :- Diphyes

GEOGRAPHICAL DISTRIBUTION

  • Cosmopolitan, tropical and sub-tropical, Atlantic, Mediterranean, Pacific coast, San Francisco to Alaska.

HABIT AND HABITAT

  • Polymorphic, free swimming, marine, pelagic and colonial hydromedusae.
DIPHYES

GENERAL CHARACTERSTICS OF DIPHYES

  • Diphyes is divided into upper and lower parts without pneumatophores. 
  • Upper part of the colony contains two identical swimming bells or nectophores having tandem arrangement.
  • Each bell contains mouth.
  • Lower part represents rest of the colony contmmng widely separated groups of zooids or cormidia.
  • Each zooid contains mouth, coenosarc, a hydrophylum, a medusoid form, a polyp or gastrozooid and number of terminally knobed tentacles bract and radial canal. 
  • Knobed part of the tentacle contains battery of nematocysts. 
  • The colony is constantly being shortened due to breaking of old and terminal zooids at the internodes. 
  • Detached zooids are called as endoxia which swim about like independent organisms and later on become sexually mature.
DIPHYES

IDENTIFICATION

  • The animal has two identical and tandem swimming bells and all above characters, hence it is Diphyes.
DIPHYES
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