Figure 3 - uploaded by Vladimir E. Fedosov
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Line drawings of gametophyte and sporophyte of Siberian plants of Rhizogemma staphylina (from Russia: Krasnoyarsk Territory, Putorana Plateau, MW9117945, isolate FDt107): (A) fertile plant, wet, (B) fertile plant, dry, (C-E,O) capsules, dry, (F) exothecial cells, (G-J) leaf transverse sections, (K,P) perichaetial leaves, (L,M,Q,R,T,U,V) stem leaves, (N,W) upper-leaf cells, (S,X) midleaf cells, (Y,BB) basal leaf cells, (Z,AA) gemmae. Scale bars: 2 mm for (A,B); 0.5 mm for (C-E,O); 1 mm for (K-M,P-R,T,U,V); 100 μm for (F-J,N,S,W-BB). Diagnosis: The single species segregated into the newly established genus differs from other dicranelloid mosses in possessing non-vaginate leaf bases and rather shortly subulate leaf acumina, recurved leaf margins, costae with single central stereid band, leaf lamina unistratose or bistratose along upper margins, yellow setae, yellow-purplish to brownish, asymmetric, furrowed capsules, revoluble annulus, and rhizoidal gemmae irregular in shape, composed of bulging cells. Etymology: The name (composed of the Greek ῥίζα, root, and Latin gemma, gem) refers to the characteristic rhizoidal tubers (commonly also referred to as gemmae) of the only currently known species of the genus. Description: Plants bright green, lacking red pigmentation. Stems about 5 mm, forming rather dense tufts, with a central strand. Leaves up to 1 mm long, lanceolate, erectspreading to spreading, not secund; margins plane or recurved only at base or nearly throughout, smooth or denticulate distally, partly bistratose distally; costae percurrent to short excurrent, in transverse section with differentiated dorsal and ventral epidermis and single stereid band; leaf lamina unistratose, cells rectangular to elongate-rectangular, bulging in transverse sections, smooth. Rhizoidal tubers constantly present, in young
Source publication
The recent molecular phylogenetic study of the families Aongstroemiaceae and Di-cranellaceae, which resolved the genera Aongstroemia and Dicranella as polyphyletic, indicated the need for changes in their circumscription and provided new morphological evidence to support the formal description of newly recognized lineages. Following up on these res...
Context in source publication
Context 1
... the number of poorly known taxa ( >600 names in Dicranella and >260 in Aongstroemia, [22]), such a project would require the efforts of the whole bryological community. (Figures 2 and 3). Etymology: The name (composed of the Greek ῥίζα, root, and Latin gemma, gem) refers to the characteristic rhizoidal tubers (commonly also referred to as gemmae) of the only currently known species of the genus. ...
Citations
... In the latter, our proposals address primarily the extensive and recurrent recovery of a paraphyletic Dicranales, including the resolution of the Archidiales between the Micromitriaceae and Leucobryaceae, two families formerly included in the Dicranales (Goffinet et al., 2009b). The Dicranales have traditionally been rather broadly defined (Vitt, 1982), accommodating all families that lacked the diagnostic traits of the Grimmiales and Pottiales; hence, it is not surprising that the Dicranales have never been recovered as monophyletic based on inferences from DNA sequences (La Farge et al., 2000;Goffinet et al., 2001;Cox et al., 2010;Stech et al., 2012;Fedosov et al., 2016Fedosov et al., , 2021Fedosov et al., , 2023Bonfim Santos et al., 2021) including from 100 nuclear loci . Thus, we restrict a monophyletic Dicranales to a set of core families and accommodate the remaining suite of lineages spanning between the Archidiales and Pottiales in the moss phylogeny ( Figure 2; Appendices S4, S7) in new orders. ...
... Based on the wellsupported relationships here, we propose to restrict the Dicranales (Figure 2) to only the Dicranaceae, Calymperaceae, Fissidentaceae, and Octoblepharaceae and accommodate the remaining families (Appendix S4) on topological grounds in the Amphidiales, Bruchiales, Ditrichales, Erpodiales, Eustichiales, and Rhabdoweisiales (see taxonomic treatment below). Our sampling, however, is insufficient to resolve the placement of all families in the Dicranales s.l., and so families such as the Aongstroemiaceae and Dicranellaceae (Bonfim Santos et al., 2021;Fedosov et al., 2023) remain unassigned. The Pleurophascaceae, a monogeneric family endemic to Australasia (Fife and Dalton, 2005), is the sole member of the Pottiales sensu Goffinet et al. (2009b) to be consistently resolved outside of the order (Figure 2), although with ambiguous affinities given the incongruence in topologies inferred from nucleotide versus amino acid data (Appendix S4 vs. S7, respectively). ...
Premise
Bryophytes form a major component of terrestrial plant biomass, structuring ecological communities in all biomes. Our understanding of the evolutionary history of hornworts, liverworts and mosses has been significantly reshaped by inferences from molecular data, which have highlighted extensive homoplasy in various traits and repeated bursts of diversification. However, the timing of key events in the phylogeny, patterns and processes of diversification across bryophytes remain unclear.
Methods
Using the GoFlag probe set we sequenced 405 exons representing 228 nuclear genes for 531 species from 52 of the 54 orders of bryophytes. We inferred the species phylogeny from gene tree analyses using concatenated and coalescence approaches, assessed gene conflict, and estimated the timing of divergences based on 29 fossil calibrations.
Results
The phylogeny resolves many relationships across the bryophytes, enabling us to resurrect five liverwort orders and recognize three more, and propose ten new orders of mosses. Most orders originated in the Jurassic and diversified in the Cretaceous or later. The phylogenomic data also highlight topological conflict in parts of the tree, suggesting complex processes of diversification that cannot be adequately captured in a single gene‐tree topology.
Conclusions
We sampled hundreds of loci across a broad phylogenetic spectrum spanning at least 450 Ma of evolution; these data resolved many of the critical nodes of the diversification of bryophytes. The data also highlight the need to explore the mechanisms underlying the phylogenetic ambiguity at specific nodes. The phylogenomic data provide an expandable framework toward reconstructing a comprehensive phylogeny of this important group of plants.
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Die Literaturzusammenstellung berücksichtigt überwiegend Publikationen aus dem Jahr 2023 sowie dem ersten Quartal des Jahres 2024 und beinhaltet hauptsächlich Fachbücherund Fachartikel zu Studien und Fundberichten über Moose in Mitteleuropa. Sie erhebt dabei keinen Anspruch auf Vollständigkeit. Zusätzlich sind außereuropäische Arbeiten aufgelistet, die aufgrund der behandelten Arten oder Methoden von Interesse sind. Für aktuelle Veröffentlichungen mit Fokus auf Taxonomie und Systematik sei auf den Beitrag „Taxonomische und nomenklatorische Neuerungen – Moose, von Markus K. Meier in diesem Herzogiella-Heft verwiesen. Für Hinweise auf entsprechende Publikationen für kommendeFolge dieser Serie sind wir dankbar.
As a result of identification the moss collections from Shikotan, Kunashir, Iturup and Urup islands (Southern Kuril Islands, Russian Far East) collected by T.I. Koroteeva, V.E. Fedosov, A.V. Shkurko, N.S. Liksakova, and A.K. Ezhkin in 2015–2021, new species for the islands were revealed: 6 ones for Urup, 8 for Iturup, 10 for Kunashir, and 19 for Shikotan. For the first time, 4 species new for the Kuril Islands were discovered, including three new for the Sakhalin Region (Forsstroemia cryphaeoides, Haplocladium intermedium, Rhizogemma staphylina, Meteorium buchananii). Another 3 species found in the islands are new for the Southern Kuriles (Dicranum fragilfolium, Gollania turgens, Hygroamblystegium varium). Most of the discovered species are rare in both the Sakhalin Region and the Russian Far East. To date, the moss flora of the Southern Kurils numbers 468 species and is the richest bryoflora in Russia.
