Post by surroundx on Jan 24, 2017 12:04:58 GMT
Scientific Name: Rhacocleis trilobata
Species Authority: La Greca & Messina, 1974
Common Name(s):
English – Three-lobed 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) B1ab(iii,v) ver 3.1
Year Published: 2016
Date Assessed: 2015-05-01
Assessor(s): Willemse, L.P.M., Hochkirch, A., Heller, K.-G., Kati, V., Papapavlou, K. & Tzirkalli, E.
Reviewer(s): Bushell, M., Cálix, M. & Nieto, A.
Contributor(s): Danielczak, A.
Facilitator/Compiler(s): García, M.
Justification:
The Three-lobed Bush-cricket (Rhacocleis trilobata) is only known from a few specimens collected in 1973 in the Peloponnesus, Greece. This species is assessed as Critically Endangered (possibly extinct) due to its restricted geographic range (extent of occurrence is 25 km²), it occurs at only one location, and there is an inferred decline in the number of mature individuals and in the extent and quality of habitat due to bushfires. In addition, in spite of searches for it, this species has not been recorded since 1973, and bushfires might be the reason for its disappearance. Further research is needed into the population size and trend, ecology and threats to this species. The most obvious threat to be managed within its range is the threat of wildfires, and proper wildfire management would most likely benefit this bush-cricket.
Date last seen: 1973
Geographic Range [top]
Range Description: The Three-lobed Bush-cricket is endemic to Greece, and is only known from a single locality in the Peloponnesus, from where it was described (Willemse 1982). This species' extent of occurrence (EOO) is 25 km², and its area of occupancy (AOO) has a maximum size of 20 km².
Countries occurrence:
Native:
Greece (Greece (mainland))
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 20
♦ Number of Locations: 1
♦ Lower elevation limit (metres): 1150
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This species is assumed to be decreasing, given that it has only been observed and collected once, and has not been found again even though searches have been conducted.
Current Population Trend: Decreasing
Additional data:
♦ Continuing decline of mature individuals: Yes
Habitat and Ecology [top]
Habitat and Ecology: This species has been found at medium altitudes (above 1,150 m) in arid habitat with low herbaceous vegetation, thickly covered with low bushes. It was collected together with two other species of Rhacocleis (La Greca and Messina 1974).
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Use and Trade [top]
Use and Trade: The species is not utilized.
Threats [top]
Major Threat(s): This species is only known from one locality, and given that the area is prone to bushfires, it is considered to occur at a single location, making bushfires a major threat to this species.
Conservation Actions [top]
Conservation Actions: This species has, after its discovery in 1973, never been observed or collected again. The locality where it was recorded is now in a protected area. Further research is required into the population size, distribution, possible subpopulations, and the species' habitat and ecology, as well as into possible threats to the species. Only then will it be possible to consider which conservation actions may be required. The most obvious threat to be managed within its range is the threat of wildfires, and proper wildfire management would most likely benefit this bush-cricket.
Source: www.iucnredlist.org/details/summary/44698104/0
Species Authority: La Greca & Messina, 1974
Common Name(s):
English – Three-lobed 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) B1ab(iii,v) ver 3.1
Year Published: 2016
Date Assessed: 2015-05-01
Assessor(s): Willemse, L.P.M., Hochkirch, A., Heller, K.-G., Kati, V., Papapavlou, K. & Tzirkalli, E.
Reviewer(s): Bushell, M., Cálix, M. & Nieto, A.
Contributor(s): Danielczak, A.
Facilitator/Compiler(s): García, M.
Justification:
The Three-lobed Bush-cricket (Rhacocleis trilobata) is only known from a few specimens collected in 1973 in the Peloponnesus, Greece. This species is assessed as Critically Endangered (possibly extinct) due to its restricted geographic range (extent of occurrence is 25 km²), it occurs at only one location, and there is an inferred decline in the number of mature individuals and in the extent and quality of habitat due to bushfires. In addition, in spite of searches for it, this species has not been recorded since 1973, and bushfires might be the reason for its disappearance. Further research is needed into the population size and trend, ecology and threats to this species. The most obvious threat to be managed within its range is the threat of wildfires, and proper wildfire management would most likely benefit this bush-cricket.
Date last seen: 1973
Geographic Range [top]
Range Description: The Three-lobed Bush-cricket is endemic to Greece, and is only known from a single locality in the Peloponnesus, from where it was described (Willemse 1982). This species' extent of occurrence (EOO) is 25 km², and its area of occupancy (AOO) has a maximum size of 20 km².
Countries occurrence:
Native:
Greece (Greece (mainland))
Additional data:
♦ Estimated area of occupancy (AOO) - km2: 20
♦ Number of Locations: 1
♦ Lower elevation limit (metres): 1150
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: This species is assumed to be decreasing, given that it has only been observed and collected once, and has not been found again even though searches have been conducted.
Current Population Trend: Decreasing
Additional data:
♦ Continuing decline of mature individuals: Yes
Habitat and Ecology [top]
Habitat and Ecology: This species has been found at medium altitudes (above 1,150 m) in arid habitat with low herbaceous vegetation, thickly covered with low bushes. It was collected together with two other species of Rhacocleis (La Greca and Messina 1974).
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes
Use and Trade [top]
Use and Trade: The species is not utilized.
Threats [top]
Major Threat(s): This species is only known from one locality, and given that the area is prone to bushfires, it is considered to occur at a single location, making bushfires a major threat to this species.
Conservation Actions [top]
Conservation Actions: This species has, after its discovery in 1973, never been observed or collected again. The locality where it was recorded is now in a protected area. Further research is required into the population size, distribution, possible subpopulations, and the species' habitat and ecology, as well as into possible threats to the species. Only then will it be possible to consider which conservation actions may be required. The most obvious threat to be managed within its range is the threat of wildfires, and proper wildfire management would most likely benefit this bush-cricket.
Source: www.iucnredlist.org/details/summary/44698104/0