Upland Combshell (Epioblasma metastriata)
The upland scallop lived in shallow areas including the Black Warrior and Cahaba rivers in Alabama and the Coosa River basin in Alabama, Georgia and Tennessee, USA.
The shell of the species reached a width of up to 6 cm.
The last living specimen of this species was collected from the Conasauga River in Georgia in 1988.
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syn. Dysnomia metastriata Conrad
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edited: 29.07.2012
Ribbed Slitshell (Gyrotoma pumila)
The Ribbed Slitshell was described in 1860, like all members of this genus, it was endemic to the Coosa River in Alabama, USA, it died out after the impoundment of the river system in the early 20th century.
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edited: 07.05.2019
Umbilicate Pebblesnail (Clappia umbilicata)
The Umbilicate Pebblesnail was endemic to the Coosa River in Alabama, USA, where it inhabited shoal habitats.
The species disappeared when the river was impounded.
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edited: 22.03.2018
The Three-tooth Triaenodes Caddisfly was described in 1938; it is known from populations in Alabama, Florida and Oklahoma, USA.
The Florida and Oklahoma populations appear to have been last seen in the middle 1930s, while the population in Alabama survived at least until 1991, when it was last surveyed; this species may in fact still be in existence, if so, however, its future expectations are rather bleak.
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edited: 17.05.2022
Shoal Sprite (Amphigyra alabamensis)
The Shoal Sprite is an extinct freshwater mollusk that inhabited the Coosa River near the city of Wetumpka, Elmore County, Alabama.
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edited: 02.05.2021
Knob Rocksnail (Leptoxis minor)
This species was described in 1912.
The Knob Rocksnail, also known as Knob Mudalia, was endemic to a restricted part of the Tennessee River near the city of Muscle Shoals in Alabama, USA.
The species is now extinct.
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edited: 04.110.2017
Rotund Rocksnail (Leptoxis ligata)
This species was described in 1860.
The Rotund Rocksnail was endemic to the Coosa River system in Alabama, USA, where it was restricted to the middle and lower reaches.
The shells reached sizes of about 1,3 cm.
The species disappeared after the impoundment of the river by the building of dams and is now considered extinct.
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edited: 04.11.2017
The Profound Cave Rove Beetle was described in 1956; it was endemic to a single site in Alabama, USA.
The species appears to have not been found during recent searches and might be extinct.
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edited: 16.05.2022
Lirate Rocksnail (Leptoxis lirata)
This species was described in 1922.
The Lirate Rocksnail or Lyrate Rocksnail was restricted to the middle reaches of the Coosa River in Alabama, USA.
The species disappeared after the impoundment of the river by the building of dams and is now extinct.
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edited: 04.11.2017
Pyramid Slitshell (Gyrotoma pyramidata)
The Pyramid Slitshell was described in 1845, it was endemic to the Coosa River in Alabama, USA and disappeared after the impoundment of the river at the beginning of the 20th century.
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edited: 07.05.2019
Olive Marstonia (Marstonia olivacea)
The Olive Marstonia was a very small freshwater snail, it was endemic to some rivers in Alabama.
The species is now extinct.
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edited: 28.04.2021
Striate Slitsnail (Gyrotoma lewisii)
The Striate Slitsnail was described in 1869, like all members of its genus, it was endemic to the Coosa River in Alabama, USA and disappeared after the impoundment of the river system in the early 20th century.
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edited: 07.05.2019
The Acornshell aka. Acorn Pearly Mussel was described in 1834; this species inhabited the drainages of the Cumberland- and the Tennessee Rivers in Alabama, Kentucky, Tennessee and Virginia, USA.
The species died out due to habitat destruction and pollution; the last known individuals died in the 1970s due to exposure to domestic sewage.
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Photo from: ‘Paolo G. Albano; Barbara Bongiovanni; Pamela D’Occhio; Bruno Sabelli: Natural history museums as repositories of endangered diversity: the case of the United States Unionida in the Museo di Zoologia dell’Università di Bologna. Zoosystematics and Evolution 90(2): 105-111. 2014’
https://creativecommons.org/licenses/by/4.0/
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edited: 17.08.2022
Maiden Rocksnail (Leptoxis formosa)
This species was described in 1860.
The Maiden Rocksnail was endemic to the Coosa River system in Alabama, USA, where it was restricted to the upper and middle reaches some of the tributaries.
The shells reached sizes of about 1,5 cm.
The species disappeared after the impoundment of the river by the building of dams and is now considered extinct.
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edited: 04.11.2017
Lewis’ Pearly Mussel (Epioblasma lewisii)
Lewis’ Pearly Mussel, also known as Forkshell, was once widespread over a large area in the Cumberland and Tennessee River systems.
The species is only known from empty shells, with the exception of a single specimen with preserved soft parts.
The larvae of the vast majority of the freshwater mussel species live parasitically in the gills of various river fish. However, nothing is usually known about the symbiotic relationships of the extinct species.
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syn. Dysnomia lewisi Walker, Plagiola lewisi (Walker), Truncilla lewisi (Walker)
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edited: 01.03.2024
Excited Slitsnail (Gyrotoma excisa)
The Excited Slitsnail was described in 1843, it was endemic to the Coosa River in Alabama, USA and disappeared at the beginning of the 20th century when the rivers system was impounded.
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edited: 07.05.2019
Pagoda Slitsnail (Gyrotoma pagoda)
The Pagoda Slitsnail was described in 1845, it was endemic to the middle flow of the Coosa River in Alabama, USA.
The species died out, together with its five congeneric siblings, following the impondment of the river at the beginning of the 20th century.
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edited: 07.05.2019
Pupa Elimia Snail (Elimia pupaeformis)
This species was described in 1864.
The Pupa Elimia Snail was restricted to a section of the Coosa River, from about Elmore – to St. Clair County, Alabama.
The species disappeared after the impoundment of the river due to the building of dams and is now considered extinct.
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edited: 06.11.2017
Short-spired Elimia Snail (Elimia brevis)
This species was described in 1860.
The Short-spired Elimia Snail was endemic to the middle and lower reaches of Coosa River in Alabama, USA.
The species was not reported since the river was impounded, and is now considered extinct.
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edited: 02.11.2017