New data to the knowledge on the Harpacticoida (Crustacea, Copepoda) fauna in Poland Author KARPOWICZ, Maciej text Fragmenta Faunistica 2016 59 2 87 98 http://dx.doi.org/10.3161/00159301ff2016.59.2.087 journal article 20489 10.3161/00159301FF2016.59.2.087 c9f13a5a-2221-4314-9b61-38fbb6c514ba 2391-5846 6251956 Pesceus schmeili (Mrázek, 1893) Location, ecology. Only females were found on the surface of zebra mussel ( Dreissena polymorpha ) from Lake Boczne in the Masurian Lakeland. Ge ner al d i str ib ut io n a n d b io lo g y. Palaearctic, inhabits various types of water bodies, from large lakes where it is common in benthos and reaches considerable depths, to lowland swamps and springs ( Borutzky 1952 ). Pesceus schmeili s. str. occurs throughout Europe up to and including Ural region. Widespread in Poland ( Drzycimski 1985 ). Polycyclic ( Sarvala 1990 ; Fefilova 2007 ) and oligosaprobic ( Sarkka 1995 ). Distinguishing features. Caudal rami widely divergent, almost three times as long as wide, with slightly narrowed and pointed tips. Outer and inner margins of caudal rami hairy.