Publication: Circumscription and phylogenetic position of two propagulose species of Syntrichia (Pottiaceae, Bryophyta) reveals minor realignments within the tribe Syntricheae
Authors
Gallego, M. Teresa ; Cano, María J. ; Jiménez, Juan A. ; Guerra, Juan
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Publisher
MDPI
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DOI
https://doi.org/10.3390/plants11050626
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info:eu-repo/semantics/article
Description
© 2022 by the authors. This manuscript version is made available under the CC-BY 4.0 license http://creativecommons.org/licenses/by/4.0/
This document is the Published version of a Published Work that appeared in final form in Plants. To access the final edited and published work see https://doi.org/10.3390/plants11050626
Abstract
In the course of a worldwide revision of the genus Syntrichia, we identified problems in the
circumscription of some species of the genus as well as among some allied genera grouped in the
tribe Syntricheae. This is the case for the two propagulose Syntrichia amphidiacea and S. gemmascens,
closely related to Streptopogon. We analyzed phylogenetic relationships between these species, based
on nuclear (ITS) and two plastid (trnL-F and trnG) markers and morphological features. Species
delimitation using molecular data was consistent with our preliminary morphological inference.
Phylogenetic analyses were performed using maximum likelihood and Bayesian inference methods.
Our results placed Syntrichia amphidiacea in the Streptopogon clade. Syntrichia gemmascens is also
included in Streptopogon in spite of the discrepancy of the ITS and plastid relationships, which could
be evidence of an exchange of genetic material between species in various lineages in the Pottioideae.
Streptopogon is maintained as a separate genus on the basis of morphology characters, and we consider
the differentiation of laminal papillae and the presence of a stem central strand as new characters in
the genus. We accept Sagenotortula as distinct genus sister to Syntrichia. We consider the lack of costal
dorsal epidermis and the differentiation of a crescent-shaped costal dorsal stereid band as distinctive
generic characters in Syntrichia. Additionally, we include Syntrichia percarnosa as a new synonym for
S. breviseta. Three names are lectotypified.
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ITS , Pottiaceae , Sagenotortula , Streptopogon , Syntrichia , S. amphidiacea , S. gemmascens , Taxonomy , TrnG , TrnL-F
Citation
Plants, 2022, Vol. 11, N. 15 : 626
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