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219 results for “liverworts”
FIG. 3 in New records for the liverwort and hornwort flora of Vietnam 2. Bazzania Gray and some other collections of Pierre Tixier in the National Museum of Natural History, France
FIG. 3. — Bazzania loricata (Reinw., Blume & Nees) Trevis.: A, leaf; B, underleaf. Bazzania pectinata (Lindenb. & Gottsche) Trevis.: C, leaf; D, underleaf. Bazzania praerupta (Reinw., Blume & Nees) Trevis.: E, dry shoot, side view; F, wet shoot, ventral view. Scale bars: A, C, 500 µm; B, D, 250 µm; E, F, 1 mm.
FIG. 2. Bazzania friabilis N in New records for the liverwort and hornwort flora of Vietnam 2. Bazzania Gray and some other collections of Pierre Tixier in the National Museum of Natural History, France
FIG. 2. Bazzania friabilis N.Kitag. & Kodama: A, habit, ventral view; B, shoot with caducous leaves; C, leaf apex; D, underleaves (Tixier s.n., PC0764741). Bazzania cf. indica (Gottsche & Lindenb.) Trevis.: E, habit, ventral view; F, underleaf (Tixier 185). Scale bars: A, B, F, 200 µm; C, 50 µm; D, 100 µm; E, 1 mm.
FIG. 1 in New records for the liverwort and hornwort flora of Vietnam 2. Bazzania Gray and some other collections of Pierre Tixier in the National Museum of Natural History, France
FIG. 1. — Bazzania adnexa (Lehm. & Lindenb.) Trevis.: A, underleaf; B, leaf distal half (Tixier 5256). Bazzania asymmetrica (Steph.) N.Kitag.: C, underleaf; D, habit, ventral view (Tixier s.n., PC0764741). Bazzania bidentula (Steph.) Steph. ex Yamada: E, habit, dorsal view; F, habit, ventral view (Tixier s.n., PC0764741). Scale bars: A, 125 µm; B, C, F, 250 µm; D, E, 500 µm.
FIG. 1 in Distribution and threat status of the liverwort Mannia triandra (Scop.) Grolle (Aytoniaceae, Marchantiophyta) in Montenegro
FIG. 1. — Mannia triandra (Scop.) Grolle in Montenegro (A), with carpocephala (B).
Fig. 1 in Chiloscyphus parapilistipulus (Lophocoleaceae), a new species of liverwort from New Caledonia, with the typification of Lophocolea pilistipula
Fig. 1. – Chiloscyphus parapilistipulus Thouvenot: habit, dorsal view. [Thouvenot NC2451]
Fig. 3 in In the footsteps of Michel Allioni: Liverworts and hornworts from the surroundings of Gualaquiza (Ecuador)
Fig. 3. – Label of holotype of Metzgeria allionii Steph. at G.
Fig. 1 in In the footsteps of Michel Allioni: Liverworts and hornworts from the surroundings of Gualaquiza (Ecuador)
Fig. 1. – Map of the study area in southern Ecuador.
Fig. 2 in In the footsteps of Michel Allioni: Liverworts and hornworts from the surroundings of Gualaquiza (Ecuador)
Fig. 2. – Label of holotype of Frullania pendulostyla Steph. at G.
Mitochondrial phylogenomics of liverworts
<p><strong>Premise: </strong>Liverworts, with approximately 7,300 species worldwide, exhibit remarkable morphological diversity, in terms of growth form, ontogeny and architecture. Based on phylogenetic inferences drawn from DNA data, including recent genomic-scale data, the relationships among families and orders have been constantly revised and refined, although new topological incongruences have emerged. The liverwort mitochondrial genome exhibits lower average substitution rates compared to their nuclear and plastid genomes, and shows less structural variation, suggesting its suitability for inferring relationships at higher taxonomic levels.</p> <p><strong>Methods:</strong> The mitochondrial genomes of 112 liverworts were sequenced, covering 105 species, 52 families and 18 orders. We analysed the structures of the liverwort mitogenomes using Mauve alignment. Maximum likelihood and Bayesian inference methods were used to infer a family-level phylogeny of liverworts.</p> <p><strong>Results: </strong>We assembled the complete mitochondrial genome for 23 species and identified four new structural variants. Phylogenetic inferences from mitochondrial genome sequences confirmed the monophyly of most suprafamilial taxa, with the expectations of Porellales, Ptilidiales, and Pelliidae. <em>Herzogianthus</em> (Ptilidiales) was well-supported as a sister group to Jungermanniales sensu lato, rather than forming a monophyletic lineage with <em>Ptilidium </em>(Ptilidiales). Given its distinct morphological traits, this genus should be singled out and elevated to a new order.</p> <p><strong>Conclusions: </strong>The overall architecture of liverwort mitogenomes remains highly conserved, with taxa that diverged over 470 Mya still having co-linear mitogenomes. This study provides a genetic resource for future evolutionary research across the liverworts and highlights the utility of mitogenome across lineages diversifying for 470 Mya, including for family‐level classification.</p>
FIG. 2 in An annotated list of hornwort and liverwort species of Serbia
FIG. 2. — Counties (administrative units) of Serbia.
FIG. 1 in An annotated list of hornwort and liverwort species of Serbia
FIG. 1. — Regions of Serbia.
FIG. 1 in Bryophytes from Uei tepui (Serra do Sol), with liverworts new to Brazil and the description of Leptoscyphus incisus sp. nov.
FIG. 1. — Localization map of Uei tepui (Serra do Sol).
Arctic Biodiversity: Arctic Liverworts
Biogeography and other attributes for Arctic organisms, various sources.<p></p>Meltofte, H. (ed.) 2013. Arctic Biodiversity Assessment. Status and trends in Arctic biodiversity. Conservation of Arctic Flora and Fauna, Akureyri. <p></p>https://arcticbiodiversity.is/index.php/the-report/chapters/plants
Data for: Liverworts show a globally consistent mid-elevation richness peak
<p>The study of elevational gradients allows to draw conclusions on factors and mechanisms determining patterns in species richness distribution. Several earlier studies investigated liverwort diversity on single or few elevational transects. However, a comprehensive survey on elevational distribution patterns of liverwort richness and their underlying factors is lacking so far. This study's purpose was to fill this gap by compiling an extensive dataset of liverwort elevational patterns encompassing a broad diversity of mountains and mountain ranges around the world. Using polynomial regression analyses, we found a prevalence of hump-shaped richness patterns (19 of 25 gradients), where liverwort species richness peaked at mid-elevation and decreased towards both ends of the gradient. Against our expectation and unlike in other plant groups, in liverworts, this pattern also applies to elevational gradients at mid-latitudes in temperate climates. Indeed, relative elevation, calculated as the percentage of the elevational range potentially inhabited by liverworts, was the most powerful predictor for the distribution of liverwort species richness. We conclude from these results that admixture of low- and high-elevation liverwort floras, in combination with steep ecological gradients, leads to a floristic turnover shaping elevational distribution patterns of liverwort diversity. Our analyses further detected significant effects of climatic variables (temperature of the warmest month, potential evapotranspiration, and precipitation of the warmest month) in explaining elevational liverwort richness patterns. This indicates that montane liverwort diversity is restricted by high temperatures and subsequent low water availability, especially towards lower elevations, which presumably will lead to serious effects by temperature shifts associated with global warming.</p>
FIG. 3 in A contribution to the study of hornworts and liverworts in Tunisia: a checklist and ecology of Kroumirian species
FIG. 3. — Presence index of different taxa in the studied sites.
FIG. 2 in A contribution to the study of hornworts and liverworts in Tunisia: a checklist and ecology of Kroumirian species
FIG. 2. — Species richness of the studied habitats.
Recent origin and diversification accompanied by repeated host shifts of thallus-mining flies (Diptera: Agromyzidae) on liverworts and hornworts
<p><span>Despite the vast diversity of phytophagous insects that feed on vascular plants (tracheophytes), insects that feed on bryophytes remain understudied. Agromyzidae, one of the most species-rich phytophagous clades in Diptera, consists mainly of leaf-mining species that feed on tracheophytes. However, a recent discovery of thallus-mining species on liverworts and hornworts within the <em>Liriomyza</em> group of Phytomyzinae provides an opportunity to study host shifts between tracheophytes and bryophytes. This study aimed to explore the origin and diversification of thallus-miners and estimate the pattern and timing of host shifts. Phylogenetic analysis of Phytomyzinae has revealed that the thallus-mining agromyzids formed a separate clade, which was sister to a fern pinnule-miner. The diversification of bryophyte-associated agromyzids since the Oligocene involved multiple host shifts across various bryophyte taxa. The diversification of the thallus-mining <em>Phytoliriomyza</em> may have occurred at the same time as the leaf-mining agromyzid flies on herbaceous plants, indicating a dynamic history of interactions between bryophytes and herbivores in angiosperms-dominated ecosystems.</span></p>
Mitochondrial phylogenomics of liverworts
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Data for: Liverworts show a globally consistent mid-elevation richness peak
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Recent origin and diversification accompanied by repeated host shifts of thallus-mining flies (Diptera: Agromyzidae) on liverworts and hornworts
Open the record for dataset details and reuse information.
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