A new species of diatom, Orthoseira limnopolarensis, is described from a sediment core in Limnopolar Lake on Livingston Island, South Shetlands in the South Atlantic Ocean. The new species is distinctive in having an array of numerous (12–14) carinoportulae, a number of clearly defined rimoportulae which are described here for the first time in the genus, and a valve face surface that is covered with small, irregularly scattered spines. Linking spines are less well-developed than is generally observed in species of the genus Orthoseira. No caverns or internal undulations are present. Internal valves have not been encountered.
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1 August 2014
Orthoseira limnopolarensis sp. nov. (Bacillariophyta), a New Diatom Species from Livingston Island (South Shetland Islands, Antarctica)
Bart Van de Vijver,
Richard M. Crawford
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Cryptogamie, Algologie
Vol. 35 • No. 3
August 2014
Vol. 35 • No. 3
August 2014
carinoportula
Maritime Antarctic Region
morphologie
morphology
Orthoseira
Région maritime antarctique
rimoportula