Partula turgida
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| ( Pease , 1864) |
Partula turgida is an extinct species of snail in the genus Partula . It was endemic to Raiatea in the Society Islands .
description
Partula turgida reached a length of 17 mm and a case diameter of 11.6 mm. The length of the mouth was 11.5 mm. The ridged casing was short, imperforate, ovoid, extremely thin, fragile, and horny. The color was pale light brown and somewhat transparent. The shiny surface was marked with growth lines and fine, narrow spiral strips. The spindle was very short and conical in shape. The seam was marked with a fine white line. There were 4.5 convex coils, the last of which was very large and evenly swollen. The mouth was sloping, egg-shaped in outline and took up two thirds of the length of the case. The edge of the mouth (peristome) was slightly enlarged. The spindle edge was widened and flattened above.
die out
Partula turgida was already considered rare at the beginning of the 20th century . In the 1960s, large agate snails ( Achatina fulica ) were brought to Raiatea to enrich the food supply, but they quickly proved to be a nuisance and displaced the Polynesian land snails. To combat the giant agate snails, the rosy wolf snail ( Euglandina rosea ), originally from Florida , was introduced to the Society Islands. The Partula snails were easier to catch than the giant agate snails and so 49 of the former 61 Partula species were exterminated. In 1987 the Zoological Society of London initiated a conservation breeding program for the Partula snails of the Society Islands , in which in 1990 the surviving specimens of Partula turgida were brought to the London Zoo . In 1993 the population succeeded in increasing to 400 individuals, most of which were released into a fenced reserve on the island of Moorea in 1994 . In 1995, pink wolf slugs invaded the reserve and killed all of the Partula slugs. The specimens that remained in the London Zoo gradually died as a result of an infectious disease caused by the Steinhausia parasite . The death of the last specimen was found on January 1, 1996 at 5:30 p.m.
literature
- Rajan Amin: Group Based Demographic Management In: Population Group Management Workshop 5 th - 7 th October 1998 Proceedings of the Zoological Society of London ( PDF, Online )
- George W. Tryon and Henry A. Pilsbry: Manual of Conchology. Structural and Systematic . Volume XX. Caecilioides, Glessula and Partulidae . Conchological Department, Philadelphia, 1909-1910
- Mike J. Jeffries and Michael J. Jeffries: Biodiversity and Conservation . Routledge, 2006. ISBN 0415342996
Individual evidence
- ↑ Dan Ferber: Bug Vanquishes Species. Science, 218: 215 1998 doi : 10.1126 / science.282.5387.215b
Web links
- Partula turgida in the endangered Red List species the IUCN 2013. Posted by: Coote, T., 2009. Accessed March 15, 2014.