Post by surroundx on Jan 24, 2017 13:50:38 GMT
Scientific Name: Uromenus riggioi
Species Authority: La Greca, 1964
Common Name(s):
English – Riggio's Saddle Bush-cricket
Taxonomic Source(s): Eades, D.C., Otte, D., Cigliano, M.M. and Braun, H. 2016. Orthoptera Species File. Version 5.0/5.0. Available at: Orthoptera.SpeciesFile.org.
Assessment Information [top]
Red List Category & Criteria: Critically Endangered (Possibly Extinct) B2ab(ii,v) ver 3.1
Year Published: 2016
Date Assessed: 2015-05-17
Assessor(s): Buzzetti, F.M., Hochkirch, A., Massa, B., Fontana, P., Kleukers, R. & Odé, B.
Reviewer(s): Bushell, M. & Cálix, M.
Contributor(s): Kranz, M. & Weinberger, J.
Facilitator/Compiler(s): Nieto, A.
Justification:
Riggio's Saddle Bush-cricket (Uromenus riggioi) is endemic to Sicily, Italy. This large bush-cricket was very abundant decades ago, but it has not been seen since 1970. This species is assessed as Critically Endangered (Possibly Extinct) since its area of occupancy (AOO) is probably smaller than 10 km², the population is severely fragmented, and there is an inferred continuing decline in the AOO and in the number of mature individuals since the species has not been found since 1970, despite some field work having been carried out. However, this field work did not cover all the known localities. Further research is needed to identify if the species is still extant, and to study the population size and trend as well as the threats to the species. If it is rediscovered, its habitat needs to be protected and appropriate management should be implemented to avoid any future declines.
Date last seen: 1970
Geographic Range [top]
Range Description:
Riggio's Saddle Bush-cricket is endemic to Sicily, Italy (Massa et al. 2012). The last record of this species is from 1970, and its extent of occurrence (EOO) (based on old records) was ca 6,300 km². However, the present EOO is believed to be much smaller, and its area of occupancy (AOO) is probably smaller than 10 km².
Countries occurrence:
Native:
Italy (Sicilia)
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 4-10
♦ Lower elevation limit (metres): 800
♦ Upper elevation limit (metres): 1100
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This species was described from very abundant specimens collected in a few years. However, the species has not been found since 1970 despite some field work, although this did not cover all the known localities. If the species is still extant, the population is probably severely fragmented with very small and isolated subpopulations, and the overall population trend is decreasing.
Current Population Trend: Decreasing
Additional data:
Habitat and Ecology [top]
Habitat and Ecology:
This flightless species inhabits open habitats, such as bushes, at elevation between 800 m and 1,100 m asl.
Systems: Terrestrial
Use and Trade [top]
Use and Trade:
This species is not utilised.
Threats [top]
Major Threat(s):
The threats to the species are unknown.
Conservation Actions [top]
Conservation Actions:
There are no conservation measures in place for this species, but it occurs in a protected area (Monte Etna). Further research is needed to identify if the species is still extant, and to study the population size and trend as well as the threats to the species. If the species is rediscovered, its habitat needs to be protected and appropriate management should be implemented to avoid any future declines.
Source: www.iucnredlist.org/details/summary/68486119/0
Species Authority: La Greca, 1964
Common Name(s):
English – Riggio's Saddle Bush-cricket
Taxonomic Source(s): Eades, D.C., Otte, D., Cigliano, M.M. and Braun, H. 2016. Orthoptera Species File. Version 5.0/5.0. Available at: Orthoptera.SpeciesFile.org.
Assessment Information [top]
Red List Category & Criteria: Critically Endangered (Possibly Extinct) B2ab(ii,v) ver 3.1
Year Published: 2016
Date Assessed: 2015-05-17
Assessor(s): Buzzetti, F.M., Hochkirch, A., Massa, B., Fontana, P., Kleukers, R. & Odé, B.
Reviewer(s): Bushell, M. & Cálix, M.
Contributor(s): Kranz, M. & Weinberger, J.
Facilitator/Compiler(s): Nieto, A.
Justification:
Riggio's Saddle Bush-cricket (Uromenus riggioi) is endemic to Sicily, Italy. This large bush-cricket was very abundant decades ago, but it has not been seen since 1970. This species is assessed as Critically Endangered (Possibly Extinct) since its area of occupancy (AOO) is probably smaller than 10 km², the population is severely fragmented, and there is an inferred continuing decline in the AOO and in the number of mature individuals since the species has not been found since 1970, despite some field work having been carried out. However, this field work did not cover all the known localities. Further research is needed to identify if the species is still extant, and to study the population size and trend as well as the threats to the species. If it is rediscovered, its habitat needs to be protected and appropriate management should be implemented to avoid any future declines.
Date last seen: 1970
Geographic Range [top]
Range Description:
Riggio's Saddle Bush-cricket is endemic to Sicily, Italy (Massa et al. 2012). The last record of this species is from 1970, and its extent of occurrence (EOO) (based on old records) was ca 6,300 km². However, the present EOO is believed to be much smaller, and its area of occupancy (AOO) is probably smaller than 10 km².
Countries occurrence:
Native:
Italy (Sicilia)
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 4-10
♦ Lower elevation limit (metres): 800
♦ Upper elevation limit (metres): 1100
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This species was described from very abundant specimens collected in a few years. However, the species has not been found since 1970 despite some field work, although this did not cover all the known localities. If the species is still extant, the population is probably severely fragmented with very small and isolated subpopulations, and the overall population trend is decreasing.
Current Population Trend: Decreasing
Additional data:
Habitat and Ecology [top]
Habitat and Ecology:
This flightless species inhabits open habitats, such as bushes, at elevation between 800 m and 1,100 m asl.
Systems: Terrestrial
Use and Trade [top]
Use and Trade:
This species is not utilised.
Threats [top]
Major Threat(s):
The threats to the species are unknown.
Conservation Actions [top]
Conservation Actions:
There are no conservation measures in place for this species, but it occurs in a protected area (Monte Etna). Further research is needed to identify if the species is still extant, and to study the population size and trend as well as the threats to the species. If the species is rediscovered, its habitat needs to be protected and appropriate management should be implemented to avoid any future declines.
Source: www.iucnredlist.org/details/summary/68486119/0