Acta Zoologica Cracoviensia, 35(2) 1992

Issue:

VOL 35(2) 1992

Keywords:

Predicrostonyx, Rodentia, Early Pleistocene, biostratigraphy, Poland

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Early Pleistocene Predicrostonyx (Rodentia, Mammalia) from Poland

• Adam NADACHOWSKI

Abstract:

A description is given of Predicrostonyx compitalis from the locality of Zalesiaki 1A/13. On the basis of the com m on occurrence of two species of the evolved Allophaiomys [Microtus (Allophaiomys) pliocaenicus praehintoni and Microtus (Allophaiomys) nutiensis] and the first true Microtus species identified here as Microtus (Microtus) sp. and Microtus (Microtus) ex. gr. hyperboreus, the assemblage is believed to come from above the Lower/Upper Biharian boundary most probably corresponding to the final part of the Matuyama Chron, preceding the Jaramillo event. The early history of Dicrostonychini in the Northern Hemisphere is also discussed.