Desmids (Chlorophyta), including two new species and three newvarieties, in two swamps, a lake, and a tarn in the South Island ofNew Zealand

摘要

Swamps at Okarito (Westland), Lake Hill (near Lake Coleridge), and Red Tarn and Blue Lake (in Mount Cook National Park) contained 24, 19, 20, and 8 desmid taxa, respectively. Genera represented by the largest number of taxa were Cosmarium with 17 taxa (7 of them in Okarito Swamp), Closterium with 9 taxa (6 of them in Lake Hill Swamp), and Staurastrum with 9 taxa (4 of them in Red Tarn). New species are Closterium okaritoense and Cosmarium paludicola in Okarito Swamp. New varieties are Pleurotaenium ehrenbergii var. contractum and Cosmarium crassipelle var. ornatum (both in Lake Hill Swamp), and Actinotaenium adelochondrum var. parvum (in Red Tarn). New records for the New Zealand flora are Euastrum verrucosum (in Lake Hill Swamp), Micrasterias suboblonga var. tecta (in Okarito Swamp), Cosmarium retusiforme var. incrassatum and Xanthidium smithii var. maius (both in Red Tarn), and Staurastrum neglectum and S. subarmigerum (in Blue Lake). Six other taxa previously recorded in the North Island were found in the South Island, including the endemic Cosmarium subquadratum var. genuosum and Xanthidium intermedium.