Nudibranchia

The nudibranches form parts about the Mollusque S Gastéropode S which include/understand the slugs of sea (different from the nudibranches by their coat which recovers the tail completely, and the body of the animal much finer) and the hares of sea.
They are marine animals characterized by their feathery gills nues.

The nudibranches are indexed in four pennies orders:
- Doridiens: the plume branchial is with the back of the manteau
- Dendronotacées: the branchiaux appendices are with the periphery of the manteau
- Arminacées: the surface of the coat is wrinkled and sometimes more large
- Eolidiens: the animal is covered many papillae, said cérates

Nudibranche means “naked hearing” in Latin: the recognizable animal because of presence of its Gill S, being not protected by a shell. On the back, the animal carries Tentacule S (tegumentary prolongation): dorsal papillae.

Characteristic : This animal hermaphrodite has tentacles former, the rhinophores, which are sensory antennas and detect the Bruit, the Odeur S and allow the Goût.
Rhinophore means: rino = nose/phorein = porter
The rhinophores can be smooth, ringed, lamellate or swollen.

The eyes of the nudibranches are in-depth, close to the brain, and are only used to detect the variation of lights, for example the shade of a large predator or the variation day/night.

The nudibranches have remarkable capacities of regeneration and are able to practice the autotomy. Habitat : This animal often lives on sponges, hydraires, tunicates, gorgones, under the stones and sometimes even on dead coral.

Locomotion : With the difference of the slug of sea which seems to fly in water, the nudibranche evolves/moves according to very slow movements, it crawls.

Food : like his/her land cousin the snail, the nudibranche east provides with a grater, a " rodula" composed of many teeth assembled on a flexible muscle. The form and the provision of the teeth are specific to each species and adapted to the food.

Classification according to ITIS

Families
  • Actinocyclidae
  • Aegiridae Fischer, 1883
  • Aeolidiidae Orbigny, 1834
  • Aldisidae
  • Archidorididae
  • Arminidae Rafinesque, 1814
  • Asteronotidae
  • Babakinidae
  • Chromodorididae Bergh, 1891
  • Conualeviidae
  • Corambidae Bergh, 1869
  • Cumanotidae
  • Dendrodorididae Pruvot-Fol, 1935
  • Dendronotidae Gray, 1857
  • Dironidae Eliot, 1910
  • Discodorididae Bergh, 1891
  • Dorididae Rafinesque, 1815
  • Dotoidae
  • Eubranchidae Odhner, 1934
  • Facelinidae Bergh, 1889
  • Fionidae Gray, 1857
  • Flabellinidae Dall and Simpson, 1901
  • Glaucidae Menke, 1828
  • Goniodorididae H. and A. Adams, 1854
  • Gymnodorididae Odhner, 1941
  • Hancockiidae MacFarland, 1923
  • Janolidae
  • Kentrodorididae Bergh, 1891
  • Lomanotidae
  • Onchidorididae Gray, 1854
  • Phyllidiidae Rafinesque, 1815
  • Phylliroidae Menke, 1830
  • Platydorididae
  • Polyceridae Alder and Hancock, 1845
  • Rostangidae
  • Scyllaeidae Rafinesque, 1815
  • Tergipedidae Bergh, 1889
  • Tethydidae Rafinesque, 1815
  • Triophidae Odhner in Frankly, 1968
  • Tritoniidae Menke, 1828

Sub-orders

  • Vayssiereidae Vaught, 1989
  • Doridoidea Rafinesque, 1815
  • Porostomata

Photographs

  • red Nudibranche, Hurghada
  • Nudibranche pyjamas, Hurghada

References

See too

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