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

1
Departamento de Biología Vegetal, Facultad de Biología, Campus de Espinardo, Universidad de Murcia, 30100 Murcia, Spain
2
Cerca dos Pomares, CxP 409M, 8670-052 Aljezur, Portugal
*
Author to whom correspondence should be addressed.
Academic Editor: Francisco Lara
Taxonomy 2022, 2(1), 57-88; https://doi.org/10.3390/taxonomy2010005
Received: 29 December 2021 / Revised: 17 January 2022 / Accepted: 17 January 2022 / Published: 21 January 2022
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 in 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 by hybridization or by the persistence of isolated ancestral molecular races. 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. View Full-Text
Keywords: cp-rbcL; nr-ITS region; biodiversity; distribution; Mediterranean-Atlantic Europe; mosses; nomenclature; taxonomy; Trichostomum herzogii nom. nov.; Trichostomum meridionale sp. nov. cp-rbcL; nr-ITS region; biodiversity; distribution; Mediterranean-Atlantic Europe; mosses; nomenclature; taxonomy; Trichostomum herzogii nom. nov.; Trichostomum meridionale sp. nov.
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MDPI and ACS Style

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. https://doi.org/10.3390/taxonomy2010005

AMA Style

Ros RM, Werner O, Porley RD. Herzog Vindicated: Integrative Taxonomy Reveals That Trichostomum brachydontium (Pottiaceae, Bryophyta) Comprises Several Species. Taxonomy. 2022; 2(1):57-88. https://doi.org/10.3390/taxonomy2010005

Chicago/Turabian Style

Ros, Rosa M., Olaf Werner, and Ron D. Porley. 2022. "Herzog Vindicated: Integrative Taxonomy Reveals That Trichostomum brachydontium (Pottiaceae, Bryophyta) Comprises Several Species" Taxonomy 2, no. 1: 57-88. https://doi.org/10.3390/taxonomy2010005

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