Euhadra

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Euhadra
Euhadra quaesita.jpg
Euhadra quaesita
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Heterobranchia

clade Euthyneura
clade Panpulmonata
clade Eupulmonata
clade Stylommatophora
informal group Sigmurethra

Superfamily: Helicoidea
Family: Bradybaenidae
Genus: Euhadra
Pilsbry, 1890

Euhadra is a genus of air-breathing land snails, terrestrial 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.

Distribution[edit]

These snails are almost endemic to Japan, but one of them are distributed in Korea.

Species[edit]

There are 22 species in the genus. 17 species have a dextral shell and 5 species are sinistral.[1]

Dextral species[edit]

Dextral species in the genus Euhadra include:

Sinistral species[edit]

Sinistral species in the genus Euhadra include:

References[edit]

  1. ^ Davison A, Chiba S, Barton NH, Clarke B (2005). "Speciation and Gene Flow between Snails of Opposite Chirality". PLoS Biology. 3 (9, e282): e282. PMC 1182688Freely accessible. PMID 16149849. doi:10.1371/journal.pbio.0030282.  open access publication – free to read

Further reading[edit]

  • Ueshima R. & Asami T. (16 October 2003). "Evolution: Single-gene speciation by left–right reversal". Nature 425: 679. doi:10.1038/425679a
  • (Japanese) 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 978-4-906431-25-0 (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.

External links[edit]