Euhadra
| Euhadra | |
|---|---|
 |
|
| Euhadra quaesita | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| (unranked): | clade Heterobranchia clade Euthyneura |
| 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.
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[edit] Distribution
These snails are endemic to Japan.
[edit] Species
There are 22 species in the genus. 17 species have a dextral shell and 5 species are sinistral.[1]
[edit] Dextral species
Dextral species in the genus Euhadra include:
- Euhadra amaliae (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 latispira yagurai Kuroda & Habe, 1949 [1]
- Euhadra nachicola
- Euhadra nesiotica (Pilsbry,1902)
- Euhadra peliomphala
- Euhadra sadoensis
- Euhadra sandai
- Euhadra senckenbergiana
[edit] Sinistral species
Sinistral species in the genus Euhadra include:
- Euhadra decorata
- Euhadra grata
- Euhadra grata echigoensis Murayama, Takizawa & Habe, 1991
- Euhadra murayamai
- Euhadra quaesita, Sought-after False Hadra
- Euhadra scaevola
[edit] References
- ^ "Speciation and Gene Flow between Snails of Opposite Chirality" (in English). PLoS Biology 3 (9, e282): e282. 2005. doi:10.1371/journal.pbio.0030282. PMC 1182688. PMID 16149849. http://biology.plosjournals.org/perlserv/?request=get-document&doi=10.1371/journal.pbio.0030282.
[edit] Further reading
- 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 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.
[edit] External links
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Wikimedia Commons has media related to: Euhadra |
