Two land snail species new to Finland: Macrogastra borealis (O. Boettger, 1878) and Quickella arenaria (Potiez & Michaud, 1835) (Mollusca: Gastropoda)

Kirjoittajat

• Hannu Ormio

Abstrakti

Records are presented of two land snail species which were not earlier known from Finland. Macrogastra borealis (O. Boettger, 1878) (Clausiliidae) was found already in the year 2006 from a nature reserve in Urjala, southwestern Finland (WGS84 lat: 60.9924 lon: 23.4476), but at first the species was misidentified. Totally 14 specimens were collected. The habitat is old mixed forest on dolomitic bedrock. The nearest records of Macrogastra borealis are from Estonia, 300 km southeast to Urjala. Quickella arenaria (Potiez & Michaud, 1835) (Succineidae) was found in the year 2013 from Oulanka National Park in Kuusamo, northeastern Finland (WGS84 lat: 66.3574 lon: 29.5998). Totally 19 specimens were collected from wet vegetation along a calcareous spring brook. The nearest records of Quickella arenaria have been made in northern Sweden, more than 600 km southwest to Kuusamo. Data about accompanying molluscs are given for both of the two new species. It is suggested that the present remote sites of Macrogastra borealis, Quickella arenaria and some other snail species are perhaps relics from wider ranges in earlier more favourable climatic periods.