Molecular insight on phylogeny and systematics of the Lophoziaceae, Scapaniaceae, Gymnomitriaceae and Jungermanniaceae

Abstract

The aim of the study is an expanded molecular phylogenetic analysis of the Holarctic taxa traditionally classified to the families Lophoziaceae, Scapaniaceae, Gymnomitriaceae and Jungermanniaceae. Also we will provide a justification of some nomenclatural changes suggested recently by Konstantinova & Vilnet (2009). The nuclear ITS1-2 and chloroplast trnL-F DNA sequences of 134 taxa (189 samples) from suborders Jungermanniineae and Cephaloziineae were analyzed. The topologies of phylogenetic trees constructed from combined sequences by maximum parsimony and Bayesian methods are congruent. The separation of family Diplophyllaceae from Scapaniaceae is not supported. The recently described family Solenostomataceae appears to be paraphyletic: the genus Nardia is in a sister relation to Gymnomitriaceae. The inclusion of the genus Isopaches in the family Anastrophyllaceae is questionable. Position of Obtusifolium and Protolophozia elongata in Scapaniaceae is not strongly supported. Phylogenetic relations within the genus Scapania are not fully resolved, but monophyly of sections Undulatae and Calcicolae is supported. Species assigned by some authors to a separate genus Scapaniella are scattered in different clades of the genus Scapania. Macrodiplophyllum imbricatum and M. plicatum can either be treated as Douinia or all these taxa included in Scapania. The distribution of species from the family Gymnomitriaceae on phylogenetic trees is congruent with the level of development or reduction of the perianth and perigynium. Taxonomically the species of Marsupella with reduced perianth are referred to Gymnomitrion, whereas the species called G. apiculatum that has a distinct perianth is transferred to Marsupella. The species status for Scapania tundrae, S. paludosa, S. crassiretis and Marsupella aquatica is supported. Genera Lophozia s.str., Schistochilopsis, Tritomaria, Protolophozia, Orthocaulis and Crossogyna are polyphyletic. The data support segregation of the recently described genera Pseudotritomaria, Heterogemma, Lophoziopsis, Pseudolophozia, Schljakovianthus, Schljakovia and Biantheridion.

Scapania and Macrodiplophyllum in the Russian Far East

“…Curtae. The molecular researches support the same (Vilnet et al 2010 Habitat: humus and rocks near stream in dark coniferous forests and peaty soil or over peatmoss in peatlands in tundra zone and belt; 2-1453 m alt.…”

“…Since then, this species was tran s ferred to sect. Curtae based on molecular data (Vilnet et al 2010;. The characters of green, 2celled gemmae and 1(-2) layers of thickwalled cells along margin in stem cross section suggest the same.…”

“…M. microdontum has deeply plicate, long emergent perianth and angular to almost stellate gemmae which refer it to genus Mac ro diplophyllum. Despite molecular data shows its presence within Sca pania (Vilnet et al 2010;Heinrichs et al 2012) we prefer to keep it within Macrodiplophyllum. The aforementioned features result in «euryaltitu di na li ty» of the majority of species, but that is not universal for Scapania and Macrodiplophyllum species.…”

Cephaloziella konstantinovae (Cephaloziellaceae, Marchantiophyta), A New Leafy Liverwort Species from Russia and Mongolia Identified by Integrative Taxonomy

“…Members of the former Lophoziaceae are currently considered to belong to three families: Anastrophyllaceae (Söderström et al 2010), Scapaniaceae, and Jungermanniaceae s.str. (Hentschel et al 2007;Crandall-Stotler et al 2009;Vilnet et al 2010). Cephaloziella konstantinovae differs from Anastrophyllaceae by the absence of any thickenings in cell walls, and from Scapaniaceae by the presence of regular well-developed (0.5-0.7 of leaf length) underleaves.…”

A New Species of Mesoptychia (Lindb.) A. Evans from California

“…& Arnell) A. Evans, found only in widely dispersed high arctic localities. Citing molecular evidence published by de Roo et al (2007), Vilnet et al (2010) and Masuzaki et al (2010), Váňa et al (2012) have now broadened the circumscription of Mesoptychia also to include all species previously assigned to Hattoriella (Inoue) Inoue and Leiocolea (Müll. Frib.)…”