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Issue: Vol. 745 No. 1: 12 Mar. 2026
Type: Monograph
Published: 2026-03-12
DOI: 10.11646/phytotaxa.745.1.1
Page range: 1-64
Abstract views: 0
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A broadly sampled 6-loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: IV. Cryptic species related to A. bracteata in Mongolia

Department of Higher Plants, Faculty of Biology, M.V. Lomonosov Moscow State University, 1–12, Leninskie Gory, 119234, Moscow, Russia
N.V. Tsitsin’s Main Botanical Garden of the Russian Academy of Sciences, 4 Botanicheskaya Ulitsa, 127276, Moscow, Russia
N.V. Tsitsin’s Main Botanical Garden of the Russian Academy of Sciences, 4 Botanicheskaya Ulitsa, 127276, Moscow, Russia
Department of Higher Plants, Faculty of Biology, M.V. Lomonosov Moscow State University, 1–12, Leninskie Gory, 119234, Moscow, Russia
A.N. Belozersky Research Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 1–40, Leninskie Gory, 119992, Moscow, Russia
China Mongolia taxonomy endemic hybridization molecular phylogeny refugium Eudicots

Abstract

The taxonomic diversity of the genus Atraphaxis in Mongolia and adjacent territories was studied. Maximum Likelihood and Bayesian analyses applied for six concatenated plastid regions (cpDNA trnL(UAA) intron, trnL– trnF IGS, and rpl32–trnL(UAG) IGS regions, rps16 intron, trnH-psbA, matK), and to the ITS1–5.8S–ITS2 regions of nrDNA of 46 species of the genus Atraphaxis, as well as reconstruction of plastid haplotype and ITS ribotype networks, revealed the following three new species sympatrically distributed in southern Mongolia: A. alashanica, A. gubanovii, and A. mongolensis. Molecular data and morphological characteristics indicate the hybrid nature of these species from (1) A. bracteata and A. ledebourii, (2) A. ledebourii and A. alashanica, and (3) A. pungens and A. alahanica. Atraphaxis bracteata was involved in the origin of A. selengensis, whereas A. manshurica arose as a hybrid of A. ledebourii and A. bracteata. The morphological characters of the species are illustrated by original photo tables. Distributional maps of the Mongolian species, descriptions of the new species, and an identification key to 22 Atraphaxis species from Mongolia and adjacent regions are also provided.

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How to Cite

Yurtseva, O.V., Kuznetsova, O.I., Vasilieva, N.V., Deviatov, A.G. & Samigullin, T.H. (2026) A broadly sampled 6-loci plastid phylogeny of Atraphaxis (Polygoneae, Polygonoideae, Polygonaceae) reveals new taxa: IV. Cryptic species related to A. bracteata in Mongolia. Phytotaxa 745 (1): 1–64. https://doi.org/10.11646/phytotaxa.745.1.1