Английская Википедия:Helicina rhodostoma
Шаблон:Short description Шаблон:Italic title Шаблон:Taxobox
Helicina rhodostoma is a species of tropical land snail with an operculum, a terrestrial gastropod mollusk in the family Helicinidae.
Shell description
Robert John Lechmere Guppy (1868)[1] noted that this species is not found above 1000 m altitude.[2] Three names have been used for this species, but material by Robinson et al. (2009)[2] shows that the forms intergrade, illustrating the variability of the species. In general, populations from higher altitudes have a more pronounced columellar spine, and are more likely to have a red to reddish-orange aperture, as seen in typical Helicina rhodostoma.[2] Populations from drier, coastal areas tend to lack a columellar spine, and the aperture may be white or yellow.[2] Juvenile specimens of this species often have a hairy periostracum, which is gradually worn off as the snail reaches sexual maturity.[2]
Distribution
Helicina rhodostoma is endemic to the West Indian island of Dominica.[2]
Despite the fact that Helicina rhodostoma was originally erroneously described from Guadeloupe – and in subsequent reports from that island the error has been perpetuated – this species is undoubtedly a Dominican endemic.[2] It has not been found during subsequent surveys of Guadeloupe and Marie-Galante.[2] The fact that no museum material exists labelled “Guadeloupe”, not even in the Muséum national d'histoire naturelle in Paris, indicates that the species has never been collected on that island.[2] The synonymy of Helicina goldfussi and Helicina rhodostoma inermis is confirmed by morphometrics and anatomical studies.[2]
Ecology
Helicina rhodostoma can be found living on trees, on ferns, and also between rocks and gravel.[2]
References
This article incorporates CC-BY-3.0 text from the reference.[2] Шаблон:Reflist
External links
- Richling I. The Land Snail Family Helicinidae. www.helicina.de
- ↑ Guppy R. J. L. (1868). "On the terrestrial mollusks of Dominica and Grenada, with an account of some new species from Trinidad". Annals and Magazine of Natural History (4)1: 429-442.
- ↑ 2,00 2,01 2,02 2,03 2,04 2,05 2,06 2,07 2,08 2,09 2,10 2,11 Robinson D. G., Hovestadt A., Fields A. & Breure A. S. H. (July 2009). "The land Mollusca of Dominica (Lesser Antilles), with notes on some enigmatic or rare species". Zoologische Mededelingen 83 http://www.zoologischemededelingen.nl/83/nr03/a13 Шаблон:Webarchive
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