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2 Studia Quaternaria

2 2004

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Valve surface structure of Candona neglecta Sars, 1887 (Crustacea, Ostracoda)

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Meisch C. , Wouters K.

2004

tom Vol. 21

15-18

The valves of Candona neglecta Sars, 1887, a common freshwater ostracod occurring throughout the Holarctic, were formerly described to bear tiny tubercles and spinules. It is here shown with the help of the scanning electron microscope that the valves of this species actually appear to be smooth. The tubercles and spinules described by previous authors correspond to conspicuously wide pore canals that mimic tiny surface structures when observed in the stereomicroscope. The taxonomic importance of this character is briefly discussed and a diagnosis of the neglecta-group of Candona Baird, 1845 is given. The genus name Neglecandona, which was introduced in 2001, is unavailable in the sense of the International Code of Zoological Nomenclature.

Paleolimnological study based on ostracods (crustacea) in late-glacial and holocene deposits of Lake Krakower See (Mecklenburg-Vorpommern, NE Germany)

100%

Finn A.

2004

tom Vol. 21

109-115

Two cores were taken from the southern lake basin to record the lake development from the Allerod until today. The Late Glacial and Holocene deposits of Lake Krakower See (Mecklenburg-Vorpommern, NE Germany) revealed changing water levels of the lake. Subfossil freshwater ostracods were used to interpret signals in terms of hydrological changes, eutrophication and temperature. A diverse ostracod fauna of 24 species was found in the examined sedyment samples. For the first time the development of Late-Glacial and Post-Glacial freshwater ostracod assemblage could be recorded in the study area.