World distribution: The species occurs on all continents except Antarctica, but is not known from the northern part of the boreal region nor from the Arctic (Büdel 1987, Egea 1989). It is widely distributed in Europe (Büdel 1987, Egea 1989). In Scandinavia it occurs in the southern provinces of Norway and Sweden, the northernmost being Jämtland (Santesson 1993)
Ecology: Results. The substrate was recorded as calcareous rock and/or schist (3), or unspecified rock (3). The habitat was cliffs, steep rocks, or vertical rock faces (5). Some localities were close to the sea (1937, possibly also 1938) or larger lakes (1936, 3088). The exposure was south to southwest (3). Two localities are markedly influenced by agriculture (1224, 3470). Discussion. The ecology of the species in Europe was discussed by Wirth (1972). Peltula euploca occurs on exposed, warm, mostly dry, siliceous rock which is periodically irrigated by trickling water (Wirth 1972). According to Degelius (1946a) and Santesson (1993), the species occurs mainly on seepages and on rocks on the shore of lakes
Threats: Results. The species was assumed to be threatened by waterlevel changes due to hydroelectric power development (3088, by the shore of a lake, now regarded as extinct), by closure of a birch forest (3470), and by air pollution from a nearby main road (3470). Discussions. Peltula euploca is apparently a very rare species in Norway, although it does not seem to require a particularly rare or threatened environment. We assume that the species is not threatened in most localities, except where it is threatened by changes in the water level
Status: Three old localities were investigated: It was present at 3470, regarded as extinct at 3088, and of uncertain status at 1938. No new localities were discovered. No localities are protected
Specimens in other herbaria, litterature, etc.