Authors: Aigoin, Delphine¹; Huttunen, Sanna²; Ignatov, Michael³; Dirkse, Gerard⁴; Vanderpoorten, Alain⁵

Source: Journal of Bryology, Volume 31, Number 4, December 2009 , pp. 213-221(9)

Publisher: Maney Publishing

Abstract:

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.

Keywords: MORPHOLOGICAL EVOLUTION; CONSTRAINED ANALYSES; PHYLOGENY; EURHYNCHIUM PUMILUM; BRACHYTHECIUM PERCURRENS

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/037366809X12469790518529

Affiliations: 1: University of Liège, Institute of Botany, Blvd du Rectorat 27, B22 Sart Tilman, B-4000 Liège, Belgium, or University Montpellier II, Institute of Evolutionary Sciences, Place Eugène Bataillon, B22, 34095 Montpellier cedex5, France;, Email: Delphine.Aigoin@ulg.ac.be 2: Laboratory of Genetics, Department of Biology, University of Turku, 20014 Turku, Finland;, Email: shuttu@utu.fi 3: Main Botanical Garden of Russian Academy of Sciences, Botanicheskaya 4, Moscow 127276, Russia;, Email: misha_ignatov@list.ru 4: Natuurmuseum Nijmegen, Gerard Noodtstraat 121, 6511 ST Nijmegen, The Netherlands;, Email: gerard.dirkse@wur.nl 5: University of Liège, Institute of Botany, Blvd du Rectorat, B22 Sart Tilman, B-4000 Liège, Belgium;, Email: A.Vanderpoorten@ulg.ac.be

Publication date: 2009-12-01

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