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

• Published in: Cryptogamie, Algologie
• Main Authors: Van de Vijver, Bart, Crawford, Richard M.
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2014
• Subjects: Biology; Limnopolar Lake; Livingston Island; South Shetland Islands; Antarc*; Antarctica; South Atlantic Ocean
• Online Access: https://hdl.handle.net/10067/1189290151162165141

Abstract: 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 (1214) 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.