CLASSIFICATION OF AEOLIS (SEA SLUG)​

KINGDOM :- ANIMALIA (Multicellular eukaryotic organisms)

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

CLASS :- GASTROPODA (Head bearing tentacles, eyes and radula; visceral hump and shell coiled due to torsion.)

SUB-CLASS :- EUTHYNEURA (Nerve loop not twisted in figure of 8.)

ORDER :- OPISTHOBRANCHIA (Gastropods with detorsion; gills posterior of heart; shell reduced or lacking)

SUB-ORDER :- NUDIBRANCHIA (Adults naked without mantle and shell.)

GENUS :- Aeolis

GEOGRAPHICAL DISTRIBUTION

  • It is found in Europe, U.S.A. and Rhodes Island or Arctic ocean.

HABIT AND HABITAT

  • Aeolis is a slug-like, marine gastropod, living among seaweeds and under stones between tide lines.

AEOLIS (SEA SLUG)​

GENERAL CHARACTERSTICS OF AEOLIS (SEA SLUG)​

  • Commonly called as sea slug measuring 5 cm.
  • Body is elongated, shell-less, broad, elongated, depressed, tapering behind, gray or orange coloured with brown or white spots.
  • Head comprises of 2 pairs of cylindrical non-retractile oral tentacles and a pair of sessile eye spot.
  • The anterior pair of tentacles is called as cephalic tentacles, while posterior pair is designated as rhinophores. 
  • Anus is seen in mid dorsal position. 
  • True ctenidia are replaced by several secondary cylindrical branchiae or cerata, which are distributed over dorsal surface in 15 to 20 slanting rows.
  • Dorsal surface has eyespots, anus and the ventral surface contains foot. 
  • Hermaphroditic protandrous form.
AEOLIS (SEA SLUG)​

SPECIAL FEATURES

  • It feeds on sea anemones, whose nematocysts are stored in the cerata and discharged on irritation. This is a unique example of an animal using in defence of the offensive organs of another.

IDENTIFICATION

  • The animal contains contains cerata and all above features, hence it is Aeolis.

AEOLIS (SEA SLUG)​
AEOLIS (SEA SLUG)​
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