Calliphona gomerensis 

Scope:Global
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Arthropoda Insecta Orthoptera Tettigoniidae

Scientific Name: Calliphona gomerensis
Species Authority: Pfau & Pfau, 2007
Common Name(s):
English Gomera Green Bush-cricket
Taxonomic Source(s): Eades, D.C., Otte, D., Cigliano, M.M. and Braun, H. 2014. Orthoptera Species File. Version 5.0/5.0. Available at: http://Orthoptera.SpeciesFile.org.

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(ii)+2ab(ii) ver 3.1
Year Published: 2012
Date Assessed: 2012-06-05
Assessor(s): Jakobs, D.
Reviewer(s): Hochkirch, A. & Odé, B.
Justification:
Calliphona gomerensis is endemic to the laurel forests of La Gomera. Although its habitats are still quite common and protected on La Gomera, it is threatened by increasing fire frequencies. The species is only known from five locations and has a small area of occupancy (32 km²). This area is decreasing due to habitat loss.

Geographic Range [top]

Range Description:This species is endemic to La Gomera, where it mainly occurs in laurel forest.
Countries occurrence:
Native:
Spain (Canary Is.)
Additional data:
Estimated area of occupancy (AOO) - km2:32Continuing decline in area of occupancy (AOO):Yes
Extreme fluctuations in area of occupancy (AOO):UnknownEstimated extent of occurrence (EOO) - km2:81
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):Unknown
Number of Locations:5Continuing decline in number of locations:Unknown
Extreme fluctuations in the number of locations:UnknownLower elevation limit (metres):130
Upper elevation limit (metres):1350
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No data about population size and trends are available, but population size is probrably closely related to the range of the laurel forest on La Gomera.
Current Population Trend:Decreasing
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:Calliphona gomerensis occurs mainly in laurel forests, which are still widespread and protected on La Gomera.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Unknown
Movement patterns:Not a Migrant

Use and Trade [top]

Use and Trade: This species is not utilized.

Threats [top]

Major Threat(s): The species is mainly confined to laurel forests, which are still common on La Gomera, but threatened by increasing fire frequency.

Conservation Actions [top]

Conservation Actions: No specific conservation measures are in place, but parts of the population occur in protected areas.

Classifications [top]

1. Forest -> 1.9. Forest - Subtropical/Tropical Moist Montane
suitability: Suitable  major importance:Yes
1. Land/water protection -> 1.2. Resource & habitat protection
2. Land/water management -> 2.3. Habitat & natural process restoration

In-Place Research, Monitoring and Planning
  Action Recovery plan:No
  Systematic monitoring scheme:No
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over part of range
  Occur in at least one PA:Yes
In-Place Species Management
  Harvest management plan:No
  Successfully reintroduced or introduced beningly:No
  Subject to ex-situ conservation:No
In-Place Education
  Subject to recent education and awareness programmes:No
  Included in international legislation:No
  Subject to any international management/trade controls:No
2. Agriculture & aquaculture -> 2.2. Wood & pulp plantations -> 2.2.2. Agro-industry plantations
♦ timing: Past, Unlikely to Return ♦ scope: Minority (<50%) ♦ severity: Slow, Significant Declines ⇒ Impact score: Past Impact 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 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: Minority (<50%) ♦ severity: Rapid Declines ⇒ Impact score: Medium Impact: 6 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality

10. Geological events -> 10.3. Avalanches/landslides
♦ timing: Unknown ♦ scope: Minority (<50%) ♦ severity: Rapid Declines ⇒ Impact score: Unknown 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality

11. Climate change & severe weather -> 11.1. Habitat shifting & alteration
♦ timing: Future ♦ scope: Whole (>90%) ♦ severity: Slow, Significant Declines ⇒ Impact score: Low Impact: 5 
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
3. Monitoring -> 3.1. Population trends
3. Monitoring -> 3.4. Habitat trends

Bibliography [top]

Arnedo, M.A., Oromí, P., de Abreu, S.M. and Ribera, C. 2008. Biogeographical and evolutionary patterns in the Macaronesian shield-backed katydid genus Calliphona Krauss, 1892 (Orthoptera: Tettigoniidae) and allies as inferred from phylogenetic analyses of multiple mitochondrial genes. Systematic Entomology 33(1): 145-158.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: http://www.iucnredlist.org. (Accessed: 17 October 2012).

Pfau, H.K. and Pfau, B. 2007. Zur Bioakustik von Calliphona alluaudi (Orthoptera: Tettigoniidae) von Gran Canaria und zum Status der La Gomera-Population. Mitt. Schweizerischen entomologischen Gesellschaft 80: 17-29.


Citation: Jakobs, D. 2012. Calliphona gomerensis. In: The IUCN Red List of Threatened Species 2012: e.T16895619A16897008. . Downloaded on 23 July 2016.
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