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Advisor(s)
Abstract(s)
JUSTIFICATION: Gibbaranea occidentalis is an orb-weaver spider species occurring in eight islands of the Azorean archipelago (Azores, Portugal). It has a relatively large Extent of Occurrence (EOO = 42,175 km²) and relatively small Area of Occupancy (AOO = 404-1,940 km²). This species occurs mainly in Azorean native forest, but also in shrubland, exotic forest and other disturbed habitats, although these contain marginal subpopulations mostly dominated by juvenile stages. It is abundant in the canopies of endemic trees but can also be found on the forest floor and on exotic trees. It favours humid and sheltered microhabitats being a nocturnal species. Based upon the fragmentation of subpopulations and inferred decline in EOO, AOO, decline in the quality and structure of habitat, this species is assessed as Near Threatened (NT).
Description
Keywords
Gibbaranea occidentalis Native Forest Azores
Pedagogical Context
Citation
Borges, P.A.V. & Cardoso, P. (2020). "Gibbaranea occidentalis". The IUCN Red List of Threatened Species 2020: e.T57808219A58060666. https://dx.doi.org/10.2305/IUCN.UK.2020- 3.RLTS.T57808219A58060666.en
Publisher
IUCN