Hydatina

Hydatina is a genus of sea snails, bubble snails, marine opisthobranch gastropod mollusks in the family Aplustridae.

Hydatina
Live individual of Hydatina physis, head end towards the top of the image
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Heterobranchia informal group Lower Heterobranchia
Superfamily:	Acteonoidea
Family:	Aplustridae
Genus:	Hydatina Schumacher, 1817
Species
See text

Species

Species within this genus include:

• Hydatina albocincta Van der Hoeven, 1839
• Hydatina cinctoria Perry, 1811 (color variant and synonym of Hydatina zonata).
  • Distribution: South Africa
• Hydatina exquisita Voskuil, 1995
  • Distribution: Marquesas Islands
  • Length: 21 mm
  • Description: very globose, thin shell with black and purplish spiral bands on body whorl and a narrow white band below the suture and at anterior end: anterior end of the columella is directed slightly to the right.
• Hydatina montilai Delsaerdt, 1996
  • Distribution: Philippines.
• Hydatina physis (Linnaeus, 1758)
• Hydatina velum Gmelin, 1791 (probably color variant and synonym of Hydatina zonata)
  • Distribution: Indian Ocean, East Africa
  • Length: 25–50 mm
• Hydatina vesicaria (Lightfoot, 1786) brown-lined paper bubble
  • Distribution: Florida, Mexico, Caribbean.
  • Length: 17–45 mm
  • Description: lives on the bottom at the depth of 8 m to 64 m; very fragile and delicate shell with fine brown spiral lines
• Hydatina zonata Solander in Lightfoot, 1786 zoned paper bubble

synonyms

• Hydatina amplustre Linnaeus, 1758 accepted as Aplustrum amplustre

Gallery

• 
  Hydatina albocincta
• 
  Hydatina physis
• 
  Hydatina zonata

References

• SEM images of the radula can be found at Thompson, T.E.; Bebbington, A. (1973). "Scanning electron microscope studies of gastropod radulae". Malacologia. 14: 147–165.
• Sea Slug Forum info
• Info on the genus