Английская Википедия:Clappia umbilicata
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Clappia umbilicata, the umbilicate pebblesnail, was a species of small freshwater snail that had an operculum, an aquatic gastropod mollusk in the family Lithoglyphidae.[1] This species is now extinct.[2][3]
Distribution
This species was endemic to the State of Alabama in the United States.[2] The type locality is the Coosa River at Wetumpka, Alabama.[4]
The distribution of this species used to include: Coosa River at Duncan's Ripple, The Bar and Higgin's Ferry in Chilton County; and Butting Ram Shoals in Coosa County, Alabama.[5][6]
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Chilton County, Alabama (marked red) where the species was found
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Coosa County, Alabama (marked red) where the species was also found
Description
This species was discovered and described under the name Somatogyrus umbilicatus by the American malacologist Bryant Walker in 1904.[4] Walker's type description reads as follows:
The color of Clappia umbilicata was black.[5] This presumably means that the whole animal including snout, nape, mantle and foot were black.[1] The black color of the mantle was verified by Thompson (1984).[1]
Clappia umbilicata has 56-59 rows of teeth on its radula.[1] Each row has 6-7 central basocones, 6-7 central ectocones, 18-21 lateral teeth, ca. 50 inner marginal teeth and ca. 35 outer marginal teeth.[1]
Ecology
The natural habitat of this species was rivers.[2] Clappia umbilicata inhabited only the rapidly flowing sections of river shoals.[1] The snail died out because of silting of its habitat after the dam was constructed in 1928.[2] (Also see Jordan Dam and Jordan Lake).
Based on examination of the radula, Thompson (1984)[1] hypothesized that Clappia umbilicata grazed on fine particles of plants, specializing on finer-sized particles than those consumed by snails in the genus Somatogyrus.[1]
References
Шаблон:Commons category This article incorporates public domain text from reference[4][6] Шаблон:Reflist
- ↑ 1,0 1,1 1,2 1,3 1,4 1,5 1,6 1,7 Thompson F. G. (1984). "North American freshwater snail genera of the hydrobiid subfamily Lithoglyphinae". Malacologia 25(1): 109-141.
- ↑ 2,0 2,1 2,2 2,3 Ошибка цитирования Неверный тег
<ref>; для сносокiucn status 15 November 2021не указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокNatureServeне указан текст - ↑ 4,0 4,1 4,2 Ошибка цитирования Неверный тег
<ref>; для сносокWalker 1904не указан текст - ↑ 5,0 5,1 Ошибка цитирования Неверный тег
<ref>; для сносокWalker 1909не указан текст - ↑ 6,0 6,1 Clench W. J. (1965). "A new species of Clappia from Alabama". The Nautilus 79(1): 33-34. Figure 2.
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