MAIISG

Assessment Rationale:

Philodromus insulanus is endemic to Madeira Island, Portugal. This species has a restricted geographic range with a maximum estimate of extent of occurence (EOO) and area of occupancy (AOO) of ca 800 km². However, Philodromus insulanus is assessed as Least Concern (LC), since the preferred habitat of the species, humid laurisilva forest, is not experiencing any decline in area or quality and the population is therefore assumed to be stable. A monitoring of population trends should be conducted to confirm species status.

Geographic Range:

Philodromus insulanus is known throughout the laurisilva forest that occupies about 20% of the island of Madeira (Portugal), mainly on its steep and humid northern slopes. Multiple collection sites are recorded for the species, mostly recent and in laurisilva forest (Kulczyński 1905, Schenkel 1938, Denis 1962, Crespo et al. 2014). It was possible to perform species distribution modelling to predict its potential range with confidence limits (Cardoso et al. 2017).

Population:

No population size estimates exist, but the population is assumed to be stable.

Habitat and Ecology

Philodromus insulanus is restricted to the humid laurisilva forest on the northern slopes of Madeira Island. The species is an active hunter at low to high vegetation feeding mainly on small size arthropods.

Major Threat(s):

There are no known threats to the species.

Conservation Actions

No specific conservation measures are in place for the species, but most of the species range is inside the Madeira Natural Park. Monitoring of population trends should be conducted to confirm species status.