Acta Zoologica Cracoviensia, 5() 1960
Wyniki badań nad rozmieszczeniem perłorodki rzecznej (Margaritifera margaritifera L.) na Dolnym Śląsku
[The results of the investigations on the distribution of Margaritifera margaritifera L. in Lower Silesia]
Abstract:
SUMMARY. То prove the question of occurrence of Margaritifera margaritifera L. in Poland the investigations in several rivers and stream s in Lower Silesia (mainly in the Izerskie Mts. and their foot-hills) have been made. In the effect of the mentioned study (made in 1956 and 1957) no living specimens of the species under consideration have been found. However, in the stream Źrenica (distr. Lubań) 67 shells of the species have been found. They have been identified as belonging to Margaritifera margaritifera subsp, minor ROSSM. ( = jetschini West.). The above results allow to consider M. margaritifera L. to be extinct in Poland.
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