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Synura cronbergiae sp. nov., a new species described from two paleogene maar lakes in northern Canada

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A new species representing the genus Synura, S. cronbergiae, is described from two Paleogene maar lakes situated near the Arctic Circle in northern Canada. The new taxon is characterized by long, slender, siliceous scales each bearing a small forward projecting spine, a base plate with evenly spaced pores and a secondary layer consisting of hexagonal chambers. Each chamber encloses a base plate pore, opens dorsally via a small pore, and collectively the chambers fuse to form a continuous secondary layer. Although S. cronbergiae is believed most closely related to species in the Sectio Synura due to the presence of a distal spine and lack of a median keel, scales superficially resemble those from a rare species in the Sectio Petersenianae, Synura longisquama. The potential evolutionary history, in the context of the genus, is discussed.
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Keywords: EOCENE; NEW SPECIES; PALEOGENE; SYNURA; SYNUROPHYTES

Document Type: Research Article

Publication date: August 1, 2013

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  • Nova Hedwigia is an international journal publishing original, peer-reviewed papers on current issues of taxonomy, morphology, ultrastructure and ecology of all groups of cryptogamic plants, including cyanophytes/cyanobacteria and fungi. The half-tone plates in Nova Hedwigia are known for their high quality, which makes them especially suitable for the reproduction of photomicrographs and scanning and transmission electron micrographs.
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