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Issue: Vol. 677 No. 1: 12 Dec. 2024
Type: Article
Published: 2024-12-12
DOI: 10.11646/phytotaxa.677.1.2
Page range: 49-65
Abstract views: 136
PDF downloaded: 6

Stigmagloia lobbanii gen. et sp. nov. (Bacillariophyceae, Mastogloiales), a new stigma-bearing diatom genus separated from Mastogloia

K.A. Timiryazev Institute of Plant Physiology of Russian Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, Russia
K.A. Timiryazev Institute of Plant Physiology of Russian Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, Russia
K.A. Timiryazev Institute of Plant Physiology of Russian Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, Russia
K.A. Timiryazev Institute of Plant Physiology of Russian Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, Russia
Institute of Oceanography, Viet Nam Academy of Science and Technology, 01 Cau Da, Nha Trang Viet Nam
K.A. Timiryazev Institute of Plant Physiology of Russian Academy of Sciences, Botanicheskaya St. 35, 127276 Moscow, Russia
diatoms morphology SEM genus species Vietnam Algae

Abstract

The genus Mastogloia comprises mainly marine diatoms with a modified and specialized valvocopula called partecta. We isolated a new species, morphologically similar to M. cyclops, from the coastal waters of Viet Nam. A detailed study using light and scanning electron microscopy as well as molecular phylogenetic analysis based on SSU rDNA and rbcL sequences led us to describe a new genus and species, Stigmagloia lobbanii gen. et sp. nov. The main difference between Stigmagloia and Mastogloia is the presence of a stigma. The differences between S. lobbanii and M. danseyi, the type species of Mastogloia, are discussed. Mastogloia cyclops is transferred to Stigmagloia and a new combination, S. cyclops comb. nov., is proposed.

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