Helix godetiana 

Scope: Global, Europe & Mediterranean
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Mollusca Gastropoda Stylommatophora Helicidae

Scientific Name: Helix godetiana Kobelt, 1878

Assessment Information [top]

Red List Category & Criteria: Endangered B2ab(i,ii,iii,iv,v) ver 3.1
Year Published: 2011
Date Assessed: 2010-09-19
Assessor(s): Triantis, K. & Vardinoyannis, K.
Reviewer(s): Livingstone, S., Livingstone, S. & Neubert, E.
This species is endemic to Greece. The expansion of the cultivated areas and fire has played a role in the restriction of the species' populations and their local extirpation. According to Mylonas (1982, 1983), it was intensive grazing, and the subsequent impoverishment of the species' habitats that had the most significant impact of reducing population size. The species is extinct from most of the island previously present (now only known from subfossils) (Mylonas 1982, 1983). Currently, the area of occupancy is about 72 km2 and there is a continuing decline in any the (i) extent of occurrence, (ii) area of occupancy, (iii) the quality of habitat, (iv) number of locations or subpopulations,  and (v) the number of mature individuals. This species is listed as Endangered B2ab(i,ii,iii,iv,v).
Previously published Red List assessments:

Geographic Range [top]

Range Description:The species is endemic to Greece, being distributed in some of the Cyclades Islands (central Aegean), Rhodes and Astypalaia and some very small offshore islets. For most of these islands it is known from sub-fossils (Mylonas 1982, Mylonas 1983, Triantis et al. 2008).
Countries occurrence:
Greece (East Aegean Is.)
Additional data:
Estimated area of occupancy (AOO) - km2:72Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:
Continuing decline in extent of occurrence (EOO):Yes
Number of Locations:3Continuing decline in number of locations:Yes
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There is an overall declining trend for the species' population. This species is extinct from most of the islands where it was previously present (now only known from sub-fossils) (Mylonas 1982, 1983).
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Population severely fragmented:Yes
Continuing decline in subpopulations:Yes

Habitat and Ecology [top]

Habitat and Ecology:The species is ground-dwelling, found in Mediterranean shrublands in limestone areas and sandy beaches, avoiding forests of Quercus and Pinus (Mylonas 1982, 1983).
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: As for most of the large snails of the Mediterranean, especially Helix spp., it is highly possible that this species is eaten as part of the local diet. However, there is no specific data on this.

Threats [top]

Major Threat(s): The expansion of the cultivated areas and fire has played a role in the restriction of the species' populations and their local extirpation. Nevertheless, according to Mylonas (1982, 1983), it was intensive grazing, and the subsequent impoverishment of the species habitats that had the most significant impact.

Conservation Actions [top]

Conservation Actions: This species is listed in the Greek Red Data Book as Critically Endangered (Legakis and Maraghou 2009). The protection of its habitat and monitoring of the population is needed.

Classifications [top]

3. Shrubland -> 3.4. Shrubland - Temperate
suitability:Suitable  major importance:Yes
13. Marine Coastal/Supratidal -> 13.3. Marine Coastal/Supratidal - Coastal Sand Dunes
suitability:Suitable  major importance:Yes
1. Land/water protection -> 1.1. Site/area protection

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education
2. Agriculture & aquaculture -> 2.3. Livestock farming & ranching -> 2.3.1. Nomadic grazing
♦ timing:Ongoing ♦ scope:Majority (50-90%) ♦ severity:Slow, Significant Declines ⇒ Impact score:Medium Impact: 6 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

7. Natural system modifications -> 7.1. Fire & fire suppression -> 7.1.1. Increase in fire frequency/intensity
♦ timing:Ongoing ♦ scope:Unknown ♦ severity:Unknown ⇒ Impact score:Unknown 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality

1. Research -> 1.2. Population size, distribution & trends
3. Monitoring -> 3.1. Population trends

♦  Food - human
 Local : ✓ 

Bibliography [top]

IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: (Accessed: 30 June 2017).

Legakis, A. and Maragkou, P. 2009. The Red Data Book of the threatened species of Greece [in Greek]. Hellenic Zoological Society, Athens.

Mylonas, M. 1982. The zoogeography and ecology of the terrestrial molluscs of Cyclades. University of Athens.

Mylonas, M. 1983. The distribution and ecology of the species Helix godetiana Kobelt (Gastropoda, Pulmonata). Biologia Gallo-Hellenica 10: 139-142.

Triantis, K.A., Vardinoyannis, K. and Mylonas, M. 2008. Biogeography, land snails and incomplete data sets: The case of three island groups in the Aegean Sea. Journal of Natural History 42: 467-490.

Citation: Triantis, K. & Vardinoyannis, K. 2011. Helix godetiana. The IUCN Red List of Threatened Species 2011: e.T9844A13020810. . Downloaded on 18 July 2018.
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