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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
Animalia	Mollusca	Gastropoda	Stylommatophora	Helicidae

Scientific Name:	Tyrrheniberus sardonius
Species Authority:	(E. von Martens, 1884)
Taxonomic Notes:	Fauna Europaea lists this taxon as a separate species. According to Fiorentino et al. (2010), it is a junger synonym of T. villicus. Earlier K. L. Pfeiffer (1946) proposed that T. sardonius should be treated as a subspecies of T. villicus. According to the assessors of this species, this view should be retained. However, as the taxon is listed as a species in its own rights in Fauna Europea, it is here assessed as such.

Assessment Information [top]

Red List Category & Criteria:	Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published:	2011
Date Assessed:	2011-03-18
Assessor(s):	Falkner, M., Falkner, G. & von Proschwitz, T.
Reviewer(s):	Cuttelod, A. & Bilz, M.
Justification: The (sub)species is endemic to an extremely restricted area in the eastern coastal mountains of Sardinia, i.e. a 2 km stretch of the canyon of the torrent Fuili (south east of Dorgali) where it occurs occasionally sympatric with T. ridens. It is threatenad by human activities. If considered as a subspecies of T. villicus (as recommended) it should be noted that there is a large disjunction to the area of the nominal subspecies. Following the view of Fauna Europaea, which recognises it as a species in its own rights, it is here assessed as Critically Endangered (EN) B1ab(iii)+2ab(iii).

Geographic Range [top]

Range Description:	This species is endemic to Sardinia (Italy). It live in an extremely restricted area in the eastern coastal mountains of Sardinia, i.e. a 2 km stretch of the canyon of the torrent Fuili (south east of Dorgali).
Countries occurrence:	Native: Italy (Sardegna)
Additional data:	♦ Estimated area of occupancy (AOO) - km2: 4 ♦ Number of Locations: 1
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	There is no information available on the population size or trend of this species.
Current Population Trend:	Unknown
Additional data:	♦ Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology:	This species is a typical rock-dweller on limestone rocks in Mediterranean vegetation types.
Systems:	Terrestrial
Continuing decline in area, extent and/or quality of habitat:	Yes

Use and Trade [top]

Use and Trade:

This species is not used.

Threats [top]

Major Threat(s):

The major threat to this species are recreational activities like rock climbing and probably flood events.

Conservation Actions [top]

Conservation Actions:

There is no conservation action in place for this species.