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Issue: Vol. 708 No. 3: 8 Jul. 2025
Type: Article
Published: 2025-07-08
DOI: 10.11646/phytotaxa.708.3.1
Page range: 241-259
Abstract views: 653
PDF downloaded: 10

Revision of the Mallomonas splendens species clade (Chrysophyceae, Synurales) based on morphological and molecular data

Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia
Papanin Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, 109, 152742, Yaroslavl Region, Russia
Joint Vietnam-Russia Tropical Science and Technology Research Center, 63 Nguyen Van Huyen, Nghia Do, Cau Giay, Ha Noi, 11307, Vietnam
Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia
Synurales Mallomonas section Quadratae scale ultrastructure molecular phylogeny metabarcoding new combination new species Algae

Abstract

This research is devoted to the study of the Mallomonas splendens species complex in a tropical region using electron microscopy and molecular methods. Based on a study of 18 algal cultures belonging to the M. splendens morphotype, three clades were identified based on the SSU rDNA + rbcL cpDNA and ITS1-5.8S-ITS2 rDNA datasets. Based on these studies, the phylogenetic position of Mallomonas splendens sensu stricto was established and two new species were described based on molecular and morphological data: Mallomonas croomei sp. nov. and Mallomonas tyleri sp. nov. A new combination, Mallomonas arnhemensis comb. et stat. nov. was also proposed. The problems associated with the identification of Mallomonas splendens and determination of the scale morphotype belonging to taxa of this complex are discussed. Based on the literature data and metabarcoding results, the distribution of all three taxa was revised.

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How to Cite

Gusev, E.S., Shkurina, N.A., Tran, H. & Martynenko, N.A. (2025) Revision of the Mallomonas splendens species clade (Chrysophyceae, Synurales) based on morphological and molecular data. Phytotaxa 708 (3): 241–259. https://doi.org/10.11646/phytotaxa.708.3.1