Assessment Rationale:

Trogloneta madeirensis is one of the most common species in Madeira Island (Portugal), known throughout the laurisilva forest and also other habitats. This species has a restricted geographic range with a maximum estimate of extent of occurrence (EOO) and area of occupancy (AOO) of ca 800 km². However, Trogloneta madeirensis is assessed as Least Concern (LC), since the species seems to be able to live on several habitat types, even close to human settlements and the population is therefore assumed to be stable. Additionally, there are no known threats to the species. A monitoring of population trends should be conducted to confirm species status.

Geographic Range:

Trogloneta madeirensis is one of the most common species in Madeira Island, known throughout the laurisilva forest and also other habitats including caves and close to urban areas. Multiple collection sites are recorded for the species, mostly recent and in laurisilva forest (Wunderlich 1987, Wunderlich 1992, Crespo et al. 2014). It was possible to perform species distribution modelling to predict its potential range with confidence limits (Cardoso et al. 2017). The extent of occurrence (EOO) and area of occupancy (AOO) have a maximum estimate of ca 800 km².

Population:

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

Habitat and Ecology

This species is most common in humid laurisilva forest but recorded from several habitat types. This tiny spider has been found living among the rocks and trees, shrubs and herbs and also in moss on tree trunks (Wunderlich 1987). It possibly builds three-dimensional webs (Hajer 2000).

Major Threat(s):

There are no known threats to the species.

Conservation Actions

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