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Glacial chironomid

Started by Laci Hamerlik, March 30, 2017, 01:22:43 PM

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Laci Hamerlik

Hi everybody

We have found a certain type of larval head capsules in a sediment core taken from a lake in the Tatra Mountains (N Slovakia). This type only occurs in the laminated sediments older than 8000 years (i.e. when the lake was strongly influenced by a glacier) and entirely disappears together with the lamination (i.e. glacier in the valley). It is for sure a cold-stenothermal species most likely linked to glacial conditions recently occurring in glacier lakes. The head is quite dark, the mentum has 1 median and 7 lateral teeth; these characters can occur in Diamesa, Cricotopus and Orthocladius...

Thank you in advance!

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