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Issue: Vol. 630 No. 4: 21 Dec. 2023
Type: Article
Published: 2023-12-21
DOI: 10.11646/phytotaxa.630.4.4
Page range: 295-300
Abstract views: 100
PDF downloaded: 8

Mallomonas rimosa sp. nov. (Synurales, Chrysophyceae)—a rare tropical species from Vietnam

A.N. Severtsov Institute of Ecology and Evolution; Russian Academy of Sciences; Leninsky Prospect 33; 119071 Moscow; Russia
Joint Vietnam-Russia Tropical Science and Technology Research Center; 63 Nguyen Van Huyen; Nghia Do; Cau Giay; Ha Noi; Vietnam
Institute of Plant Physiology; Russian Academy of Sciences; Botanical Street 35; 127276; Moscow; Russia
A.N. Severtsov Institute of Ecology and Evolution; Russian Academy of Sciences; Leninsky Prospect 33; 119071 Moscow; Russia
Synurales Mallomonas ection Torquatae scale ultrastructure new species tropics Algae

Abstract

A new species, Mallomonas rimosa sp. nov., is described from Vietnam based on silica-scale morphology observed using scanning and transmission electron microscopy. Mallomonas rimosa belongs to section Torquatae and is most similar to M. eoa, M. prora, M. serrata, M. scrobiculata, M. pumilio var. dispersa, M. caverna, and M. lanalhuensis. The main distinctive features of scales of the newly described species are the shield ornamentation with small, circular, and evenly spaced pits and the single row of papillae on each side of the anterior flange. Mallomonas rimosa was found in water bodies with acidic conditions, low mineralization, and high temperature.

 

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