Valvata klemmi

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I thought we would have a thread for this species, but wasn't able to find anything.

Valvata klemmi

family: Valvatidae

This (and others too - but which?) was rediscovered in 2007, but there seems nothing to have been published since then.

Good News from Biodiversity Research

Nowadays, there seem to be only bad news coming from biodiversity research: habitat fragmentation, species extinction, biodiversity crisis, invasive species. Bearing these scenarios in mind, the Systematics and Biodiversity Group organized a student field trip to nine Greek Balkan lakes. The results, however, are more than encouraging: four mollusc species were found that were previously thought to be extinct for, in part, more than 50 years (one of them is the figured Valvata klemmi). Furthermore, two potentially new mollusc species were found, which are currently characterized genetically. The reason for the sudden reappearance of these species is so far unknown - the enthusiastic field work of the students from Giessen, however, certainly contributed significantly to these positive findings.

source:

www.uni-giessen.de/cms/faculties/research-centers/ifz/picture-of-the-month/october-2007?language_sync=1

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Valvata klemmi Schütt

family: Valvatidae

a freshwater snail from the Balkan region; almost for sure extinct now

source:

C. Régnier; B. Fontaine; P. Bouchet: Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214–1221. 2009

[surroundx]

Nov 30, 2013 16:55:26 GMT @noisi said:

source:

C. Régnier; B. Fontaine; P. Bouchet: Not Knowing, Not Recording, Not Listing: Numerous Unnoticed Mollusk Extinctions. Conservation Biology 23(5): 1214–1221. 2009

Available online:

faculty.umb.edu/anamarija.frankic/eeos476/Class%20Materials/Habitats/mollusk%20extinction%20article.pdf

[surroundx]

This species is found in Greece, where it is recorded from Lake Trichonis, Lake Ozeros, and Lake Lysimachia (Albrecht et al. 2009). Currently V. klemmi is restricted to the north-east and –west shore of Lake Trichonis as well as west shore of Lake Ozeros (Albrecht et al. 2009).

This species is endemic to Greece. It has declined severely at its only known sites between 1962 (when it was thought to be common) up to 1982. Recent surveys in the last 25 years have only recorded shells, and the most recent surveys have only found dead shells at sites on the northeast and northwest edge of the lake Trichonis as well as Lake Ozeros, but not in Lake Lysimachia (Albrecht et al. 2009). The species is under threat from multiple changes in the waters of the lake, heavy pollution (with increasing nitrate content following water draining into the lake from streams carrying agricultural fertilizers used on the land and inflow of sewage) and over abstraction of water from the lake as the species occurs in a narrow belt in the lake. It is therefore considered as Endangered (EN B1ab(iii)).

www.iucnredlist.org/species/155855/4855874#assessment-information