Article (Scientific journals)
Rhynchostegiella (Brachytheciaceae): molecular re-circumscription of a convenient taxonomic repository
Aigoin, Delphine; Huttunen, Sanna; Ignatov, Michael et al.
2009In Journal of Bryology, 31, p. 213–221
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Keywords :
Brachythecium percurrens; Eurhynchium pumilum; phylogeny; constrained analyses; morphological evolution; bryophytes
Abstract :
[en] The moss genus Rhynchostegiella (Helicodontioideae, Brachytheciaceae) has long served as a convenient repository for small brachythecioid pleurocarps. Its circumscription is revised in the context of a chloroplast phylogeny of the Helicodontioideae employing trnL-trnF, atpB-rbcL, psbT-psbH, and psbA-trnH sequence data. The analysis resolves with full posterior probabilities a core Rhynchostegiella clade of eight species. Rhynchostegiella pumila and R. duriaei are both resolved outside that clade and accommodated in their own genera, Microeurhynchium gen. nov. and Pseudorhynchostegiella gen. nov., respectively. Rhynchostegiella leptoneura is sister to Aerolindigia capillacea and R. papuensis is closely related to Eurhynchiella zeyheri. One of the reasons why these unrelated species, together with other taxa, were traditionally included within Rhynchostegiella, is that the genus is morphologically poorly defined by only a single synapomorphic change followed by reversals in half of the species. The Madeiran endemic Brachythecium percurrens is resolved as sister to all the other genera of the Helicodontioideae and is transferred into a new monotypic genus, Hedenasiastrum gen. nov.
Disciplines :
Genetics & genetic processes
Author, co-author :
Aigoin, Delphine ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Taxonomie végétale et biologie de la conservation
Huttunen, Sanna
Ignatov, Michael
Dirkse, Gerard
Vanderpoorten, Alain ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Taxonomie végétale et biologie de la conservation
Language :
English
Title :
Rhynchostegiella (Brachytheciaceae): molecular re-circumscription of a convenient taxonomic repository
Publication date :
December 2009
Journal title :
Journal of Bryology
ISSN :
0373-6687
Publisher :
Maney Publishing, Leeds, United Kingdom
Volume :
31
Pages :
213–221
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 03 February 2010

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