Tag Archives: Hydrobiidae

Turricaspia obventicia (Anistratenko in Anistratenko & Prisyazhniuk)

Kiliya Freshwater Snail (Turricaspia obventicia)

This species was descried in 1992; it is known only from the type that was collected from Holocene deposits near the city of Kiliya in the Odessa Region of the Ukraine.

The species most likely died out for natural reasons. [1]

***

syn. Caspia obventicia Anistratenko in Anistratenko & Prisyazhniuk

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References:

[1] Frank P. Wesselingh; Thomas A. Neubauer; Vitaliy V. Anistratenko; Maxim V. Vinarski; Tamara Yanina; Jan Johan ter Poorten; Pavel Kijashko; Christian Albrecht; Olga Yu. Anistratenko; Anouk D’Hont; Pavel Frolov; Alberto Martínez Gándara; Arjan Gittenberger; Aleksandre Gogaladze; Mikhail Karpinsky; Matteo Lattuada; Luis Popa; Arthur F. Sands; Sabrina van de Velde; Justine Vandendorpe; Thomas Wilke: Mollusc species from the Pontocaspian region – an expert opinion list. ZooKeys 827: 31-124. 2019

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edited: 18.11.2021

Tryonia circumstriata (Leonard & Ho)

Striped Tryonia (Tryonia circumstriata)

The Striped Tryonia was described in 1960, apparently originally from fossil speciemens collected from Pleistocene deposits on the right bank of the Pecos River in Chandler County, Texas, USA.

The species was later found in the Diamond Y Draw in Pecos County (originally described as a distinct species, Stockton’s Tryonia (Tryonia stocktonensis Taylor) in 1987, but then synonymized with this species). [1]

It appears to be extinct now, however.

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References:

[1] Robert Hershler: Systematics of the North and Central American aquatic snail genus Tryonia (Rissooidea: Hydrobiidae) Smithsonian Contributions to Zoology 612: 1-53. 2001

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edited: 02.05.2019

Pyrgulopsis torrida Hershler, Liu, Babbitt, Kellog & Howard

Little Sycamore Pyrg (Pyrgulopsis torrida)

The Little Sycamore Pyrg was described in 2016, it had formerly been misidentified as another species, the Yaqui Pyrg (Pyrgulopsis stearnsiana (Pilsbry)).

The species was restricted to a single small, shallow stream that runs for about 1,6 km in the Little Sykcamore Canyon in Ventura Canyon, California, USA.

The shells reach sizes of about 0,28 cm in heigth. [1]

***

The Little Sycamore Pyrg was already rare in 2000, however, when the type locality was revisited in 2015, the stream was completely dry, indicating that the species had lost its only habitat and may thus be now extinct. [1]

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References:

[1] Robert Hershler; Hsiu-Ping Liu; Caitlin Babbit; Michael G. Kellog; Jeanette K. Howard: Three new species of western California springsnails previously confused with Pyrgulopsis stearnsiana (Caenogastropoda, Hydrobiidae). ZooKeys 601: 1-19. 2016

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Photo from: ‘Robert Hershler; Hsiu-Ping Liu; Caitlin Babbit; Michael G. Kellog; Jeanette K. Howard: Three new species of western California springsnails previously confused with Pyrgulopsis stearnsiana (Caenogastropoda, Hydrobiidae). ZooKeys 601: 1-19. 2016’

(under creative commons license (4.0))
http://creativecommons.org/licenses/by-nc/4.0

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edited: 18.05.2022

Turricaspia marisnigri Starobogatov in Alexenko & Starobogatov

Black Sea Freshwater Snail (Turricaspia marisnigri)

The Black Sea Freshwater Snail was descried in 1987; it is known only from Holocene deposits; it is known exclusively from subfossil shells that were recovered from Holocene deposits near the coast of the Crimea Peninsula, Ukraine.

The species disappeared for natural reasons. [1]

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References:

[1] Frank P. Wesselingh; Thomas A. Neubauer; Vitaliy V. Anistratenko; Maxim V. Vinarski; Tamara Yanina; Jan Johan ter Poorten; Pavel Kijashko; Christian Albrecht; Olga Yu. Anistratenko; Anouk D’Hont; Pavel Frolov; Alberto Martínez Gándara; Arjan Gittenberger; Aleksandre Gogaladze; Mikhail Karpinsky; Matteo Lattuada; Luis Popa; Arthur F. Sands; Sabrina van de Velde; Justine Vandendorpe; Thomas Wilke: Mollusc species from the Pontocaspian region – an expert opinion list. ZooKeys 827: 31-124. 2019

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edited: 18.11.2021

Vinodolia fluviatlis (Radoman)

River Mudsnail (Vinodolia fluviatlis)

This species is known from the Zrmanja river, where it is now extinct; an additional population might still exist in the lower parts of the Neretva River, where it is restricted to freshwater habitats close to the estuary into the Adriatic Sea.

The plan to build a sluice at this site certainly will lead to the destruction of this last population. [1]

***

I have no idea if this species is now already extinct and thus will mention it here only briefly.

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References:

[1] Dr. Jörg Freyhof: Threatened freshwater fishes and molluscs of the Balkan, potential impact of hydropower projects. Unpublished report, ECA Watch Austria & EuroNatur 2012

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edited: 16.05.2021

Marstonia castor F. G. Thompson

Beaverpond Marstonia (Marstonia castor)

The Beaverpond Marstonia was described in 1977, it is known exclusively from its type locality, Cedar Creek in the Flint River Drainage, Crisp County, Georgia, USA.

The species was not found during recetn surveys and was finally declared extinct in December 2017. [1]

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References:

[1] Georgia Snail Is First Species Declared Extinct Under Trump Administration. www.biologicaldiversity.org. Retrieved 2018-01-07

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edited: 01.05.2019

Neohoratia coronadoi (Bourguignat)

Crowned Neohoratia Snail (Neohoratia coronadoi)

The Crowned Neohoratia Snail was described in 1870; I could not find out much about it except for a brief account of its former type locality.:

in Madrid’s surroundings or, at least, in some springs or streams of the New Castille Province” [1]

The species is now considered most likely extinct. [1]

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References:

[1] Beatriz Arconada; Maria-Angeles Ramos: Revision of the genus Islamia Radoman, 1973 (Gastropoda, Caenogastropoda, Hydrobiidae), on the Iberian Peninsula and description of two new genera and three new species. Malacologia 48(1-2): 77-132. 2006

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Depiction from: ‘Jules René Bourguignat: Mollusques nouveaux, litigieux, ou peu connus. Fasc. 1. Paris: cneohoratiahez F. Savy 1865’

(not in copyright)

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edited: 27.04.2022

Mercuria globulina (Letourneux & Bourguignat)

Globule Mercuria Snail (Mercuria globulina)

The Globule Mercuria Snail was described in 1887, it is or was restricted to the central- and eastern parts of the Tell Atlas of Algeria and Tunisia. 

The shells reach sizes of about 0,25 to 0,3 cm in length. [1]

***

I personally do not know now if it is indeed extinct, however, the species apparently has not been seen since the 19th century, was not found during recent surveys, and its name appears in lists of extinct molluscs.

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References:

[1] Peter Glöer; Slimane Bouzid; Hans D. Boeters: Revision of the genera Pseudamnicola Paulucci 1878 and Mercuria Boeters 1971 from Algeria with particular emphasis on museum collections. Archiv für Molluskenkunde 139(1): 1-22. 2010

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edited: 05.05.2019

Vinodolia lacustris (Radoman)

Lake Prespa Mudsnail (Vinodolia lacustris)

The Lake Prespa Mudsnail was described in 1973, it was apparently endemic to Lake Prespa, an quite ancient lake that is located between Albania, Greece, and Macedonia.

There are no recent records of this species and it is believed to be possibly extinct.

***

Another species of that genus, which was also presumed extinct, was rediscovered in 2013. [1] 

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References:

[1] Magdalena Szarowska; Sebastian Hofman; Andrzej Falinokski: Vinodolia fiumana Radoman, 1973 (Caenogastropoda: Rissoidea): rediscovery and relationships of a species presumed extinct. Folia Malacologica 21(3): 135-142. 2013

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edited: 24.10.2020

Graecoanatolica macedonica Radoman & Stankovic

Macedonian Freshwater Snail (Graecoanatolica macedonica)

The Macedonian Freshwater Snail was described in 1978, it was endemic to Lake Dojran between Greece and the Republic of North Macedonia, where it was found near the shore in depths between 0 to 50 cm.

The species begun to disappear in the 1970s when the level started to sink due to increasing extraction of lake water for agriculture that led to the complete loss of the species’ habitat.

The last living individuals were finally found in 1992, and the species is likely extinct.

***

The story of the Macedonian Freshwater Snail, however, is not over yet: during the most recent surveys that took place in 2012, only empty shells were recovered, yet some of them appearing very fresh, leading to the hope that some popualtions may still linge somewhere in the Lake. [1] 

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References:

[1] Canella Radea; Aristeidis Parmakelis; Vassilis Papadogiannis; Despoina Charou; Kostas A. Triantis: The hydrobioid freshwater gastropods (Caenogastropoda, Truncatelloidea) of Greece: new records, taxonomic re-assessments using DNA sequence data and an update of the IUCN Red List Categories. ZooKeys 350: 1-20. 2013

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Photo: A. Mrkvicka

(under creative commons license (3.0))
http://creativecommons.org/licenses/by-sa/3.0

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edited: 05.05.2019

Graecoanatolica conica Radoman

Cone-shaped Spring-Snail (Graecoanatolica conica)

The Cone-shaped Spring-Snail was descriobed in 1973, it was restricted to its type locality, a spring named Kayın located near the village of Sarıkavak in the Mersin Province, Turkey.

The species was never found again since its description, and given the fact that its only locality has recently extremely diminished, it is considered extinct. [1]

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References:

[1] Ümit Kebapçı; Seval Bahadir Koca; Mehmet Zeki Yildirim: Revision of Graecoanatolica (Gastropoda: Hydrobiidae) species in Turkey. Turkish Journal of Zoology 36(4): 399-411. 2012

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edited: 05.05.2019

Falsipyrgula beysehirana (Schütt)

Beysehir Freshwater Snail (Falsipyrgula beysehirana)

The Beysehir Freshwater Snail was described in 1965; it is known from the Lake Beyşehir in the vicinity of Beyşehir, a municipality in the Konya Province of Turkey.

The shell is tower-shaped and conical, elongated and pointed, rather solid, pale, with seven slowly and regularly increasing whorls, the first two to three whorls being slightly convex and the others almost straight in outline. [1]

The species’ name appears in a list of extinct Gastropoda, yet I could not find any additional information. [2]

***

syn. Falsipyrgula pfeiferi ssp. beysehirana (Schütt), Xestopyrgula pfeiferi ssp. beysehirana Schütt

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References:

[1] Pavle Radoman: On the relations of some freshwater Mollusca of the Balkan Peninsula and Asia Minor. Basteria 37: 77-84. 1973
[2] Robert H. Cowie; Claire Régnier; Benoît Fontaine; Philippe Bouchet. Measuring the Sixth Extinction: what do mollusks tell us? The Nautilus 131(1): 3-41. 2017

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edited: 15.01.2024

Pseudamnicola oudrefica (Letourneux & Bourguignat)

Oudhref Pseudamnicola Snail (Pseudamnicola oudrefica)

The Oudhref Pseudamnicola Snail was described in 1887, it was apparently restricted to a place somewhere near the village of Oudhref in the Gabès Governorate, Tunisia.

This species has not been found since the 19th century and is now extinct.

***

I could not find any other information about this species so far, it appears that no one really cares for molluscs, let alone small to tiny ones.

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edited: 05.05.2019

Angrobia dulvertonensis (J. E. Tenison-Woods)

Macquarie Slug (Angrobia dulvertonensis)

The Macquarie Slug was described in 1876; it was a freshwater snail that was restricted to Port Macquarie, a coastal town on the mid north coast of New South Wales, Australia.

The species was last seen in 1996 and is now considered most likely extinct.

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edited: 14.11.2021

Graziana lacheineri ssp. adriolitoralis (Radoman)

Adriatic Mud Snail (Graziana lacheineri ssp. adriolitoralis)

This subspecies of Lacheiner’s Mud Snail (Graziana lacheineri (Küster)) was described in 1975, it inhabited coastal habitats along the Adriatic Coast in northwestern Croatia, from which it apparently disappeared. [1]

The taxonomical status of thus form is not well understood, it may well represent a distinct species.

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References:

[1] Claire Régnier; Benoît Fontaine; Philippe Bouchet: Not knowing, not recording, not listing: numerous unnoticed mollusk extinctions. Conservation biology 23(5): 1214-1221. 2009

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edited: 12.06.2020

Pyrgulopsis brandi (Drake)

Brand’s Pyrg (Pyrgulopsis brandi)

Brand’s Pyrg was described in 1953, it was endemic to the thermal springs at las Palomas in Chihuahua, Mexico.

The springs at Las Palomas dried out in the 1970s, leading to the extinction of the endmic molusc fauna, inluding this species. [1]

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References:

[1] Robert Hershler: A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae). Smithsonian Libraries 554(554): 1-115. 1994

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edited: 01.05.2019

Pseudamnicola ragia Letourneux & Bourguignat

Ragia Pseudamnicola Snail (Pseudamnicola ragia)

The Ragia Pseudamnicola Snail was described in 1887, it is known from two localities in Tunisia.

The species has not been found since the 19th century and is now extinct.

***

Unfortunately I could not trace any other information about this species so far.

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edited: 05.05.2019

Pseudamnicola latasteana Letourneux & Bourguignat

Oasis Pseudamnicola Snail (Pseudamnicola latasteana)

This species was described in 1887 based on specimens that had been collected in a oasis in Tunisia (?), it was not found since and is considered extinct. 

***

Unfortunately I could not find out any more information up to now.

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edited: 05.05.2019

Pyrgulopsis nevadensis (Stearns)

Lake Pyramid Pyrg (Pyrgulopsis nevadensis)

The Lake Pyramid Pyrg was described in 1883, it was restricted to the Pyramid Lake in Washoe County in Nevada, USA. 

The exact date of its disapeerance appears not to be known, however, the last specimens collected alive date from the very late 1800s, and despite the fact that shells are still commonly found, no living specimen was ever found since and the species is obviously extinct. [1]

***

The Lake Pyramid Pyrg also inhabited Walker Lake in Mineral County, Nevada, however, this population is only known from fossil remains and eppaers to be of Pleistocene age. [1]

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References:

[1] Robert Hershler: A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae). Smithsonian Contributions to Zoology 554: 1-115. 1994

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Photo: Corey Lange
http://www.inaturalist.org/people/coreyjlange

(under creative commons license (4.0))
http://creativecommons.org/licenses/by-nc/4.0

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edited: 01.05.2019

Pyrgulopsis ruinosa Hershler

Fish Lake Pyrg (Pyrgulopsis ruinosa)

The Fish Lake Pyrg was described in 1998, it was restricted to its type locality, a single spring in the Fish Lake-Soda Spring Valleys in Esmeralda County, Nevada, USA.

The species was last recorded in 1988, its type locality is heavily decgraded and the species was never recorded since, it is extinct.

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edited: 13.09.2020

Pyrgulopsis carinata Hershler

Carinate Duckwater Pyrg (Pyrgulopsis carinata)

The Carinate Duckwater Pyrg was described in 1998, it was restricted to a stretch of only about 20 m of outflow habitat of a single spring in the Hot creek-Railroad Valleys in Nye County, Nevada, USA.

The species was last found during surveys in 2009, but has since not be recorded and is thus considered most likely extinct.

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edited: 18.05.2019

Pseudamnicola doumeti Letourneux & Bourguignat

Doumets Pseudamnicola Snail (Pseudamnicola doumeti)

Doumets Pseudamnicola Snail was described in 1887, it was restricted to a single locality in Tunisia.

The species has not been found since the 19th century and is apparently extinct.

***

Unfortunately I could not trace any further information about this species up to now.

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edited: 05.05.2019

Islamia graeca Radoman

Greek Islamia Snail (Islamia graeca)

This species was described in 1973; it was endemic to Lake Amvrakia in the Aetolia-Acarnania region on the mainland of Greece.

The species was restricted to the sublittoral zones of the lake; a habitat that today has almost completely fell dry due to over-extraction of water from the lake.

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edited: 10.08.2022

Pyrgulopsis chupaderae (Taylor)

Chupadera Pyrg (Pyrgulopsis chupaderae)

The Chupadera Pyrg was described in 1987, it was restricted to its type locality, Willow Spring on the Cienaga Ranch at the southern end of the Chupadera Mountains in Socorro County, New Mexico, USA. [1]

***

There appears to be a last surviving population of this species located on private land, however, given the fact that groundwater pumping is not really regulated, this last population may already be extinct as well, this cannot be proven because the landowners are uncooperative. [2]

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References:

[1] Robert Hershler: A review of the North American freshwater snail genus Pyrgulopsis (Hydrobiidae). Smithsonian Libraries 554(554): 1-115. 1994
[2] Robert hershler; Hsiu-Ping Liu; Jeanette Howard: Springsnails: A new conservation focus in western North America. BioScience 64(8): 693-700. 2014 

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edited: 01.05.2019

Zaumia sanctizaumi (Radoman)

Ohrid Freshwater Snail (Zaumia sanctizaumi)

This species was described in 1964, it was a freshwater snail restricted to a very small area in the southeast part of Lake Ohrid in Albania. 

The quality of the lake’s water has declined due to pollution and, because the species was not recorded during rescent surveys, it is believed to be very probably extinct.

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edited: 15.04.2019

Mercuria letourneuxiana (Bourguignat)

Letourneux’s Mercuria Snail (Mercuria letourneuxiana)

Letourneux’s Mercuria Snail was described in 1862, it is, or probably was restricted to thermal springs around the region of Annaba in the northeastern corner of Algeria.

The shells of this species reach sizes of about 0,22 to 0,26 cm in length. [1]

***

A somewhat aberrant form was described as a distinct species, Bythinia desertorum Bourguignat. [1]

***

Letourneux’s Mercuria Snail is now probably extinct.

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References:

[1] Peter Glöer; Slimane Bouzid; Hans D. Boeters: Revision of the genera Pseudamnicola Paulucci 1878 and Mercuria Boeters 1971 from Algeria with particular emphasis on museum collections. Archiv für Molluskenkunde 139(1): 1-22. 2010

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edited: 05.05.2019

Pseudamnicola singularis Letourneux & Bourguignat

Singular Pseudamnicola Snail (Pseudamnicola singularis)

The Singular Pseudamnicola Snail was described in 1887, it was apparently restricted to two localities; one somewhere near the village of Oudhref and the second one near Gabès, the capital city of the Gabès Governorate, both in Tunisia.

The species was never found again since its description and appears to be extinct. 

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edited: 05.05.2019