Cahaba pebblesnail
Cahaba pebblesnail | |
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Black and white photo of apertural view of the shell of Clappia cahabensis | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda
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Order: | Neotaenioglossa |
Family: | Lithoglyphidae |
Genus: | Clappia |
Species: | †C. cahabensis
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Binomial name | |
†Clappia cahabensis |
The Cahaba pebblesnail, scientific name Clappia cahabensis, is a
This species is named after the Cahaba River. This species is endemic to the United States.[1]
This species was listed as
Until recently the Cahaba pebblesnail was believed to be extinct, one of 34 snail species fallen victim to dams built along the Coosa River between 1917 and 1967. In 2004 however, biologists discovered the snail living less than fifty miles to the west, in Alabama's Cahaba River, which parallels the Coosa.[4]
Description
Clappia cahabensis has been described by American
Clappia cahabensis, new species. Fig. 2.
Shell small, reaching 3 mm. in length, umbilicate, and smooth. Color a yellowish brown, whorls 3.5, strongly convex.
Sutureindented. Spire extended. Aperture subcircular, slightly flaring, holostomatous and attached to the body whorl only at its upper part. Umbilicus narrow and deep. No sculpture. Periostracum thin. Operculum paucispiral with the nucleus nearly centered. Animal white.length width
3.5 mm. 2.7 mm. Holotype
3 2.4 Paratype
Types. Holotype, Museum of Comparative Zoology no. 251167, from the Cahaba River, 1 mile north of Centreville, Bibb Co., Alabama, Leslie Hubricht collector, Nov. 18, 1964.
Remarks. This is the second known species in the genus Clappia. The type species, C. clappi Walker is known from the Coosa River at Duncan's Ripple, The Bar, and Higgin's Ferry, all in
Coosa County, Alabama. The Cahaba River at Centreville is 160 river miles from the southmost Coosa locality.This species differs from C. clappi by being proportionately more attenuate, having a smaller umbilicus and a less flaring margin of the aperture. Walker stated that the animal was black in C. clappi (Nautilus 22: 90).
The soft anatomy of C. cahabensis is white.
Ecology
Its natural
References
This article incorporates public domain text from the reference[2]
- ^ . Retrieved 16 November 2021.
- ^ a b c Clench W. J. (1965). "A new species of Clappia from Alabama". The Nautilus 79(1): 33-34. Figure 2.
- ^ a b c Thompson F. G. (1984). "North American freshwater snail genera of the hydrobiid subfamily Lithoglyphinae". Malacologia 25(1): 109-141.
- ^ Nijhuis M. (August 2009). "River Of Riches: The Cahaba" Archived 2011-05-15 at the Wayback Machine. Smithsonian. accessed 24 July 2009.