Orthoseira limnopolarensis sp. nov. (Bacillariophyta), a new diatom species from Livingston Island (South Shetland Islands, Antarctica)

Bart Van de VIJVER & Richard M. CRAWFORD

en Cryptogamie, Algologie 35 (3) - Pages 245-257

Published on 29 August 2014

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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