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Findings of Alona protzi Hartwig 1900 (Branchiopoda: Anomopoda. Chydoridae) in Finland

Mirva Nykänen¹ and Kaarina Sarmaja-Korjonen² 

¹Department of Ecological and Environmental Sciences, University of Helsinki, Niemenkatu 73, 15140 Lahti, Finland, e-mail: mirva.nykanen@helsinki.fi

²Department of Geology, P.O. Box 64, 00014 University of Helsinki, Finland, e-mail: kaarina.sarmaja-korjonen@helsinki.fi

Abstract

Alona protzi is a rare species of Cladocera, occurring in lake littoral throughout Europe. However, little is known about this animal, and so far it has not been included in provisional lists of species found in Finland. In this short report we present our findings of Alona protzi, both recent and subfossil material, as well as one previous, unpublished finding site of the species in Finland. We found three subfossil shells of this species in the bottom sediments of two lakes. In a third lake w e found intact animals, an ephippial female and a male, while sampling stony bottom of lake littoral.