Parastenocaris brevipes Kessler, 1913

(Figs 1–3)

L o c a t i o n, e c o l o g y. Parastenocaris brevipes was usually found in peatbogs surrounding dystrophic lakes in Wigry National Park, i.e. Suchar II, Suchar Wielki. The species has so far been known only from the Masurian Lakeland in Poland (Drzycimski 1985).

G e ne r a l d i s t r i b u t i o n a nd b i o l o g y. Whole Europe. Geographic distribution of P. brevipes is likely influenced by the distribution of sphagnous peat bogs, the preferred habitat of the species (Borutzky 1952).

D i s t i n g u i s h i n g f e a t u r e s. Length without caudal setae 0.4–0.5 mm. Body vermiform, all somites with almost equal width (Fig. 1). Caudal rami narrow (Fig. 3), nearly as long as anal somite (Fig. 1). Antennule seven-segmented, long second segment with three parallel setae (Fig. 2). Swimming legs very short with slender joints (Borutzky 1952).