Euhadra
Encyclopedia
Euhadra is a genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of air-breathing land snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...

s, terrestrial
Terrestrial animal
Terrestrial animals are animals that live predominantly or entirely on land , as compared with aquatic animals, which live predominantly or entirely in the water , or amphibians, which rely on a combination of aquatic and terrestrial habitats...

 pulmonate gastropod mollusks in the family Bradybaenidae. (This snail genus was previously placed in the family Eulotidae).

A few of the species in this genus are unusual in that specimens in those species always have left-handed "sinistral" coiling in their shells, as shown in the specimen on the right. The rest of the species in the genus are right-handed or "dextral" in the shell coiling, as is usually the case in the great majority of gastropods.

Species

There are 22 species in the genus. 17 species have a dextral
Laterality
Laterality is the preference that most humans show for one side of their body over the other. Examples include right-handedness or left-footedness. It may also apply to other animals, or to plants.- Human laterality :...

 shell and 5 species are sinistral.

Dextral species

Dextral species in the genus Euhadra include:
  • Euhadra amaliae
    Euhadra amaliae
    Euhadra amaliae is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae.- External links :*...

    (Kobelt, 1875)
  • Euhadra awaensis
  • Euhadra brandtii
  • Euhadra callizona
  • Euhadra congenita
  • Euhadra dixoni (Pilsbry, 1900)
  • Euhadra eoa
  • Euhadra herklotsi (Martens, 1861)
  • Euhadra idzumonis
  • Euhadra kunoensis Kuroda in Masuda & Habe, 1989
  • Euhadra latispira
  • Euhadra nachicola
    Euhadra nachicola
    Euhadra nachicola is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae. This species is endemic to Japan....

  • Euhadra nesiotica (Pilsbry,1902)
  • Euhadra peliomphala
    Euhadra peliomphala
    Euhadra peliomphala is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae.This species is endemic to Japan...

  • Euhadra sadoensis
    Euhadra sadoensis
    Euhadra sadoensis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae. This species is found in Japan....

  • Euhadra sandai
    Euhadra sandai
    Euhadra sandai is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae....

  • Euhadra senckenbergiana
    Euhadra senckenbergiana
    Euhadra senckenbergiana is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae. This species is found in Japan.The shell of this species is dextral.- Subspecies :...

    • Euhadra senckenbergiana aomoriensis (Gulick & Pilsbry, 1900)
    • Euhadra senckenbergiana ibukicola
    • Euhadra senckenbergiana notoensis
    • Euhadra senckenbergiana minoensis
    • Euhadra senckenbergiana senckenbergiana


Sinistral species

Sinistral species in the genus Euhadra include:
  • Euhadra decorata
    Euhadra decorata
    Euhadra decorata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae. This species is found in Japan.The shell of this species is sinistral....

  • Euhadra grata
    • Euhadra grata echigoensis Murayama, Takizawa & Habe, 1991
  • Euhadra murayamai
    Euhadra murayamai
    Euhadra murayamai is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae. This species is endemic to Japan.In this species, the gastropod shell is sinistral....

  • Euhadra quaesita
    Euhadra quaesita
    Euhadra quaesita, common name, the "sought-after false hadra, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Bradybaenidae. This species is found in Japan....

    , Sought-after False Hadra
  • Euhadra scaevola

Further reading

  • Ueshima R. & Asami T. (16 October 2003). "Evolution: Single-gene speciation by left–right reversal". Nature 425: 679. doi:10.1038/425679a Kawana M. (2007). かたつむりの世界〈マイマイ属〉 The world of land snails (Euhadra) in Japan. Nagoya, Kinmirai-sha. 332 pp. ISBN 9784906431250 (with English introduction)
  • Yamazaki N., Ueshima R., Terrett J. A., Yokobori S., Kaifu M., Segawa R., Kobayashi T., Numachi K., Ueda T., Nishikawa K., Watanabe K. & Thomas R. H. (1997). "Evolution of pulmonate gastropod mitochondrial genomes: comparisons of complete gene organizations of Euhadra, Cepaea and Albinaria and implications of unusual tRNA secondary structures". Genetics 145: 749-758.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK