Algologia 2015, 25(4): 428–438 https://doi.org/10.15407/alg25.04.428New Taxa and Noteworthy Records
A new species of the genus Mallomonas Perty (Synurales, Chrysophyceae) from Vietnam
Gusev E.S.- Papanin’s Institute for Biology of Inland Waters Russian Academy of Sciences,
- Settl. Borok, Nekouz District, 152742 Yaroslavl Region, Russia,
Abstract
Mallomonas paragrandis E.S. Gusev sp. nov. is described from Zua River, located in Khanh Hoa Province, Central Viet Nam. The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. New species has oval or obovoid scales with evenly distributed large pores in proximal half of the scales. Distal part is covered with hexagonal reticulation with minute pores inside each mesh and papillae in the angles of the meshes. New species belongs to the Section Planae and closely related to Mallomonas sorohexareticulata Jo, Shin, Kim, Siver & Andersen, M. hexareticulata Jo, Shin, Kim, Siver & Andersen and M. matvienkoae Asmund & Kristiansen var. grandis Dürrschmidt & G. Cronberg. Results of morphological comparison were approved by molecular analysis on the basis of nuclear 18S and 28S rDNA and plastid rbcL genes.
Keywords: Synurales, Mallomonas, new species, morphological and molecular studies
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