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New dasycladalean algal species from the Kalana Lagerstätte (Silurian, Estonia)

Published online by Cambridge University Press:  28 April 2015

Viirika Mastik
Affiliation:
Department of Geology, University of Tartu, Ravila 14A, 50411 Tartu, Estonia, 〈viirika.mastik@ut.ee〉, 〈oive.tinn@ut.ee〉
Oive Tinn
Affiliation:
Department of Geology, University of Tartu, Ravila 14A, 50411 Tartu, Estonia, 〈viirika.mastik@ut.ee〉, 〈oive.tinn@ut.ee〉

Abstract

A Silurian (Llandovery, Aeronian) Lagerstätte in Kalana, Estonia, has revealed exceptionally preserved noncalcified thalli of dasycladalean (divison Chlorophyta) algal fossils. The siphonous, serially segmented fossils of Palaeocymopolia silurica n. sp. are closely similar to P. nunavutensis, a Ludlovian species from the Arctic Canada. The occurrence of closely related species at Baltica and Laurentia paleocontinents indicates a wide distribution of noncalcified algal flora on both sides of the Iapetus Ocean in the Paleozoic. The exceptionally well-preserved specimens from the Kalana Lagerstätte show similarity to extant species Cymopolia barbata, with lack of a calcium carbonate skeleton being the major observable difference from the latter.

Type
Articles
Copyright
Copyright © 2015, The Paleontological Society 

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