On the systematic position of Hymenoloma (Bryophyta)

Abstract

Molecular phylogenetic analyses based on nad5, rps4 and trnL-F sequences suggest the position of the genus Hymenoloma in the order Scouleriales. This order includes two monogeneric families: Scouleriaceae, with aquatic plants, and Drummondiaceae that includes mostly epiphytic mosses. Mainly epilithic Hymenoloma strongly differs from both of them, as well as they differ from each other, thus a new family Hymenolomataceae is suggested for this genus. Morphologically, Hymenoloma has no unique characters, although its outstanding plasticity provides some explanation of its relationships with Scouleria and Drummondia. Резюме Согласно данным молекулярно-филогенетического анализа, основанного на последовательностях генов nad5, rps4 и trnL-F, род Hymenoloma следует относить к порядку Scouleriales. Этот порядок включает два семейства, в каждом из которых по одному роду: Scouleriaceae, представители которого растут в воде, и Drummondiaceae, куда входят эпифитные виды. Виды рода Hymenoloma растут преимущественно на каменистых субстратах и резко отличаются от видов из обоих других семейств порядка, которые, в свою очередь, совершенно не похожи друг на друга. Поскольку род Hymenoloma не представляется возможным включить ни в одно из двух семейств порядка по морфологическим признакам, то описывается новое семейство Hymenolomataceae. Этот род не имеет каких-либо уникальных морфологических признаков; с другой стороны, его выдающаяся морфологическая пластичность позволяет объяснить родство со Scouleria и Drummondia.

Undiscovered Biodiversity of the European Moss Flora: Neodicranella hamulosa (Aongstroemiaceae), a New Genus and Species from SW Portugal

“…This not only allowed a series of previously studied Dicranella accessions to be used but also enabled new specimens to be incorporated in the phylogenetic tree, including three specimens of the unknown Portuguese species (see Appendix A). The laboratory protocol followed Fedosov et al [17,18]. After the initial phylogenetic analyses, the position of the target species was identified and consequently the dataset was largely focused on the Aongstroemiaceae clade sensu (Bonfim-Santos et al [4]), with the addition of a suite of outgroup taxa.…”

Cynodontium luthii sp. nov.: a permineralized moss gametophyte from the Late Cretaceous of the North Slope of Alaska

“…Cynodontium luthii is broadly similar to several other genera within the Rhabdoweisiaceae sensu Larraín et al (2020), but affinities with each of those genera can be readily excluded. The fossil is similar to Dicranoweisia and Glyphomitrium , but those genera have a subpercurrent (terminating just before the leaf apex) costa and broad free leaf blades (Noguchi 1987, 1988; Gradstein et al, 2001; Schofield, 2007; Ochyra et al, 2008; Fedosov et al, 2016; Lüth, 2019), unlike the fossil, which has an excurrent costa and narrower leaf blades. Species of Arctoa are also similar but have unistratose margins and elongated lamina cells, whereas C. luthii has bistratose margins distally and shorter lamina cells (Chien et al, 1999; Newmaster, 2007a; Lüth, 2019).…”

“…Alternate classifications assign Cynodontium to the families Oncophoraceae (Stech and Frey, 2008) or Dicranaceae (Gradstein et al, 2001; Flora of North America Editorial Committee, 2007; Ochyra et al, 2008). Broadly sampled phylogenetic studies of haplolepideous mosses (Cox et al, 2010; Stech et al, 2012, Fedosov et al, 2016) regularly recover a clade comprising some of these genera, which is generally referred to as Rhabdoweisiaceae. However, relationships within that clade have never been carefully studied, and the group is in need of detailed investigation and possible revision.…”

New Taxonomic Arrangement of Dicranella s.l. and Aongstroemia s.l. (Dicranidae, Bryophyta)

“…Newly generated trnK–psbA data were added for at least one representative of each major lineage left. Laboratory protocols for isolation of DNA, amplification and sequencing followed the protocols described in [ 8 , 10 , 56 , 57 ]. Genbank accession numbers of the included specimens and vouchers of specimens studied de novo are compiled in Appendix A .…”