Achatinella purple
Achatinella purple | ||||||||||||
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![]() Achatinella purple |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Achatinella purple | ||||||||||||
Pilsbry , 1914 |
Achatinella lila is a species of snail belonging to the genus Achatinella , a group of nocturnal, viviparous tree snails thatare endemic to the Hawaiian island of Oahu .
description
Achatinella purple has a case length of 1.7 centimeters and a case diameter of 1.1 centimeters. The left-hand wound housing is egg-shaped-conical, thin-walled and yet solid. It has up to five and a half turns. The shiny surface of the case is dark brown in color on the embryonic passages, and uniformly maroon brown on the body periphery, sometimes with a yellow spot, or with a side maroon band on a yellow background, or with a central green band or two maroon bands along the periphery and along the Seam. The sloping mouth is white or pale purple inside.
Existence and endangerment
The species is endangered in its population. Probable causes of the decline are excessive collection by snail collectors, the stalking by introduced pigs and rats, the clearing of forests and invasive plant species such as Clidemia hirta and Dicranopteris linearis , which prevent the regrowth of the food trees that are indispensable for the snails. The introduced ant species Pheidole megacephala , the garlic gloss snail ( Oxychilus alliarius ) and the rosy wolf snail ( Euglandina rosea ) also hunt Achatinella snails.
literature
- SM Wells, RM Pyle & NM Collins: IUCN Invertebrate Red Data Book . International Union for the Conservation of Nature and Natural Resources, 1983, ISBN 2880326028
- Henry A. Pilsbry and C. Montague Cooke: Manual of Conchology. Structural and Systematic. Volume XXII. Achatinellidae . Conchological Department, Philadelphia, 1912-1914
- EW Thwing, Henry A. Pilsbry, and C. Montague Cooke: Occasional papers of Bernice P. Bishop Museum (1907-1917) . Bernice P. Bishop Museum
- US Fish and Wildlife Service (1992): Recovery Plan for the Oʻahu Tree Snails of the Genus Achatinella (PDF; 17.1 MB) . US Fish and Wildlife Service, Portland, Oregon, Article 64 pages, Appendix 64, 5 figures.
Web links
- Achatinella purple in the endangered Red List species the IUCN 2006. Posted by: Mollusc Specialist Group, 1996. Accessed February 18, 2013.
- NatureServe Explorer - Achatinella purple