Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Herzog Vindicated: Integrative Taxonomy Reveals that Trichostomum brachydontium (Pottiaceae, Bryophyta) Comprises Several Species

Version 1 : Received: 29 December 2021 / Approved: 30 December 2021 / Online: 30 December 2021 (08:58:49 CET)

A peer-reviewed article of this Preprint also exists.

Ros, R.M.; Werner, O.; Porley, R.D. Herzog Vindicated: Integrative Taxonomy Reveals That Trichostomum brachydontium (Pottiaceae, Bryophyta) Comprises Several Species. Taxonomy 2022, 2, 57-88. Ros, R.M.; Werner, O.; Porley, R.D. Herzog Vindicated: Integrative Taxonomy Reveals That Trichostomum brachydontium (Pottiaceae, Bryophyta) Comprises Several Species. Taxonomy 2022, 2, 57-88.

Journal reference: Taxonomy 2022, 2, 5
DOI: 10.3390/taxonomy2010005

Abstract

The morphologically variable moss Trichostomum brachydontium is very common in south and west Europe, particularly under Mediterranean and Atlantic climates. A morphological study was conducted alongside a molecular phylogenetic study based on nr ITS and cp rbcL regions in order to assess if T. brachydontium is an exceptionally polymorphic species as evidenced by the number of described infraspecific taxa from the last century or, alternatively, if it includes more than one species, and if so, to find the valid name for them. Phylogenetic analyses of both nuclear and chloroplast datasets show that there are four well-supported clades. While the ITS based tree is in good agreement with the morphological data, there are a few inconsistencies with reference to the rbcL tree; this may be explained by incomplete lineage sorting or by hybridization. The morphological survey revealed well-defined discriminate differences between the four phylogenetic lineages. The taxonomic conclusions include the recognition of four species: T. brachydontium s.s., T. herzogii (a new name proposed for var. cuspidatum), T. littorale and T. meridionale (a new name proposed for var. densum). Lectotypes are designated for T. brachydontium and T. littorale. Our results underline the ongoing need of integrative studies to examine further the underestimated diversity of the T. brachydontium complex in other regions.

Keywords

cp-rbcL; nr-ITS region; biodiversity; distribution; Mediterranean-Atlantic Europe; mosses; nomenclature; taxonomy; Trichostomum herzogii nom. nov.; Trichostomum meridionale sp. nov.

Subject

BIOLOGY, Plant Sciences

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