Countries of Occurrence:
Portugal - Madeira
Groh, K., Cameron, R., Cuttelod, A. & Neubert, E.
Facilitators / Compilers/s:
Seddon (2008) suggested that the species should be considered as Vulnerable D2 (version 3.1). The species is recorded from about 11 sites, some very closely adjacent on a small island. The species could be viewed as either Near Threatened or Vulnerable D2, but Seddon (1998) placed it in the latter as she suggested there was a possible risk of grassland fire and habitat change around some of the sites. However subsequent evaluation noted the lack of declines in populations, and limited decline in habitat in recent years, so downgraded the listing to Least Concern.
This species is endemic to Porto Santo; it is currently limited to the peaks (Pico do Castello, Pico Branco, Pico do Facho). Fossil shells are scarce, but have been obtained from Porto do Frades and the Fonte de Areia; these may vindicate Paiva’s claim (which Wollaston did not believe) to have found this species’ fossil (Seddon 2008).
There are no evidence of declining populations at present.
It is generally found on summits, in the leaf-litter or on dead branches. It is found in association with L. calathiscus in the old conifer woods, which are plantations established early last century. It can also be present in leaf-litter on rocky slopes near coast.
Possible threats lie in risk of grassland fire and habitat change, due to tourist activities around some of the sites.
The species requires regular review to ensure that litter and our recreational activities do not impact the species.