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キーワード:
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要旨:
The subfossil of records of Bosmina (Eubosmina) in a sediment from the Großer Plöner See suggest that
the appearance of Bosmina reflexa morphs in the postglacial period was due to increasing morphological
variation in Bosmina longispina. In the postglacial period two species of the subgenus Eubosmina,
Bosmina longispina and B. coregoni, were co-occurring during a period of more than 8000 years. They
were always clearly separated by morphological characteristics. This separation became even more
distinct during the lake development due to divergent morphological variation in both species. There
was no indication of introgressive hybridisation.
