| Kingdom | Phylum | Class | Order | Family |
|---|---|---|---|---|
| ANIMALIA | MOLLUSCA | GASTROPODA | LITTORINIMORPHA | HYDROBIIDAE |
| Scientific Name: | Bythinella gibbosa |
| Species Authority: | (Moquin-Tandon, 1856) |
| Taxonomic Notes: | There are taxonomic issues relating to identity of the species in the genus Bythinella, but these can only be resolved with live specimens, and this species has not been recorded for over 50 years. |
| Red List Category & Criteria: | Extinct ver 3.1 |
| Year Published: | 2010 |
| Assessor/s: | Falkner, G. & Prie, V. |
| Reviewer/s: | Seddon, M., Régnier, C., Gargominy, O. & Cuttelod, A. |
| Contributor/s: | Seddon, M. |
|
Justification: This species is listed as Extinct by Falkner et al. (2002). It was originally recorded from the villages around Toulouse in the 19th century, and hasn't been recorded in the last 50 years, despite surveys conducted in this region and these habitats have been lost due to encroachment of the town including the airport at Blagnac. It is considered that the species has probably been Extinct for over 50 years, and as such has been listed as Extinct, rather than Critically Endangered (Possibly Extinct), as there are considered to be no small pockets of habitat that survive. |
|
| Range Description: | This species is endemic to France. In Falkner et al. (2002), the range is described as 'environs of Toulouse' in the department of Haute-Garonne. In Falkner et al. (2002) two locations were considered valid from Moquin-Tandon, in the 1850's at Bourassol and Blagnac and a third locality from the Locard Collections at MNHN, Paris from 'St Michel s. Touch, près de Toulouse'. Much of this region is now part of the city of Toulouse, and Boeters (pers. comm. in Falker et al., 2002) has searched for the species in the Bourassol parts of Toulouse and considered that this species has been lost during this century. |
| Countries: |
Regionally extinct:
France (France (mainland))
|
| Range Map: | Click here to open the map viewer and explore range. |
| Population: | This species is believed to be Extinct. It has not been recorded for over 50 years, despite survey efforts; possibly it became Extinct 30-50 years before that. |
| Population Trend: |
Unknown
|
| Habitat and Ecology: | This species lived in freshwater springs. |
| Systems: | Freshwater |
| Major Threat(s): | The species was recorded from springs in the small villages adjacent to Toulouse in the 1850-1860's, however these locations are now all part of the city of Toulouse, and the sites are believed to have been lost during urbanisation. |
| Conservation Actions: | The species is believed to now be Extinct. |
| Citation: | Falkner, G. & Prie, V. 2010. Bythinella gibbosa. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 24 May 2012. |
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