CLASSIFICATION OF CHAETODERMA

PHYLUM :- MOLLUSCA (Unsegmented bilaterally symmetrical and provided with visceral mass, foot and mantle. )

CLASS :- AMPHINEURA (Head reduced, without eyes and tentacles, nervous system without definite ganglia. )

ORDER :- APLACOPHORA  (Shell absent. )

GENUS :- Chaetoderma

GEOGRAPHICAL DISTRIBUTION

Found in U.S.A. and Europe.

HABIT AND HABITAT

  • Chaetodenna is marine inhabiting modem to abyssal depths, generally found in non-littoral zone. The mollusc is carnivorous, aberrant and specialized.

CHAETODERMA

GENERAL CHARACTERSTICS OF CHAETODERMA

  • Body of the animal is elongated, vermiform and almost cylindrical. 
  • Mantle well developed and completely covering the body.
  • Shell is absent but cuticle contains numerous calcareous spicules.
  • Animal has anterior mouth a constriction, calcareous cuticular spicules or epidermal papillae and anus. 
  • Heart with single auricle. 
  • Nervous system is well developed with brain and ganglia. 
  • Gills are reduced to a pair found in the cloacal cavity. 
  • Nephridial ducts act as coelomoducts.
CHAETODERMA

IDENTIFICATION

  • The animal has cylindrical body, cuticular spicules and all above features, hence it is Chaetoderma.

CHAETODERMA
CHAETODERMA
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