Angiosperms experienced one of the most remarkable radiations of land plants and are now the dominant autotrophs in terrestrial ecosystems.Recent phylogenomic studies based on large-scale data from plastid,mitochondri...Angiosperms experienced one of the most remarkable radiations of land plants and are now the dominant autotrophs in terrestrial ecosystems.Recent phylogenomic studies based on large-scale data from plastid,mitochondrial,or nuclear transcriptomes/genomes and increased taxon sampling have provided unprecedent resolution into the phylogeny of flowering plants.However,owing to ancient rapid radiations,the interrelationships among the five lineages of Mesangiospermae,the vast majority of angiosperms,remain contentious.Here we show that,although plastid and mitochondrial genomes lack sufficient phylogenetic signal for resolving deeper phylogeny,the relationships among five mesangiosperm lineages can be confidently resolved under better-fitting models using genome-scale data.According to our Bayesian cross-validation and model test in a maximum likelihood framework,siteheterogeneous models(e.g.,CAT-GTR+G4,LG+C20+F+G)outperform site-homogeneous or partition models often used in previous studies.Under site-heterogeneous models,the approximately unbiased test favored our preferred tree recovered from various datasets:Ceratophyllales(coontails)are robustly recovered as sister to monocots,and they together are sister to the clade comprising magnoliids,Chloranthales,and eudicots.Our phylogenomic analyses resolve the last enigma of the deeper phylogeny of angiosperms and emphasize the efficacy of modeling compositional heterogeneity in resolving rapid radiations of plants.展开更多
A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 p...A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 primarily based on the paired setose projections on head,apparently 1-segmented antennal club,and transverse procoxal cavities with exposed trochantins.It differs from the previously reported C.birmanicus Peris&Delclòs from the same deposit in the more narrowly separated projections(cephalic horns)on vertex and the absence of elytral absutural lines.Our discovery of a new monotomid species from the mid-Cretaceous amber highlights the palaeodiversity and morphological disparity of the family in the late Mesozoic.展开更多
Dear Editor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated one of the most profound restructurings of biodiversity in recent geological history.Despite the extinction of many iconic groups,particularly the...Dear Editor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated one of the most profound restructurings of biodiversity in recent geological history.Despite the extinction of many iconic groups,particularly the non-avian dinosaurs,there is emerging evidence that previously overlooked taxa experienced stark morphological and evolutionary stasis.In this study,we report both adult and larva of beetles of the genus Loricera preserved in mid-Cretaceous Kachin amber(Figure 1),which display striking similarity to extant congeners,indicating a stasis of their specialized feeding behavior persisting at least 100 million years.展开更多
基金supported by the National Natural Science Foundation of China(42222201,42288201)。
文摘Angiosperms experienced one of the most remarkable radiations of land plants and are now the dominant autotrophs in terrestrial ecosystems.Recent phylogenomic studies based on large-scale data from plastid,mitochondrial,or nuclear transcriptomes/genomes and increased taxon sampling have provided unprecedent resolution into the phylogeny of flowering plants.However,owing to ancient rapid radiations,the interrelationships among the five lineages of Mesangiospermae,the vast majority of angiosperms,remain contentious.Here we show that,although plastid and mitochondrial genomes lack sufficient phylogenetic signal for resolving deeper phylogeny,the relationships among five mesangiosperm lineages can be confidently resolved under better-fitting models using genome-scale data.According to our Bayesian cross-validation and model test in a maximum likelihood framework,siteheterogeneous models(e.g.,CAT-GTR+G4,LG+C20+F+G)outperform site-homogeneous or partition models often used in previous studies.Under site-heterogeneous models,the approximately unbiased test favored our preferred tree recovered from various datasets:Ceratophyllales(coontails)are robustly recovered as sister to monocots,and they together are sister to the clade comprising magnoliids,Chloranthales,and eudicots.Our phylogenomic analyses resolve the last enigma of the deeper phylogeny of angiosperms and emphasize the efficacy of modeling compositional heterogeneity in resolving rapid radiations of plants.
基金Financial support was provided by the Second Tibetan Plateau Scientific Expedition and Research project(2019QZKK0706)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB26000000 and XDB18000000)the National Natural Science Foundation of China(41688103)。
文摘A new fossil species of Monotomidae,Cretakarenni shaoi Li&Cai,sp.nov.,is reported from the mid-Cretaceous Burmese amber.The new species is attributed to the extinct genus Cretakarenni Peris&Delclòs,2015 primarily based on the paired setose projections on head,apparently 1-segmented antennal club,and transverse procoxal cavities with exposed trochantins.It differs from the previously reported C.birmanicus Peris&Delclòs from the same deposit in the more narrowly separated projections(cephalic horns)on vertex and the absence of elytral absutural lines.Our discovery of a new monotomid species from the mid-Cretaceous amber highlights the palaeodiversity and morphological disparity of the family in the late Mesozoic.
基金National Natural Science Foundation of China(41925008,42222201,and 42288201)Second Tibetan Plateau Scientific Expedition and Research project(2019QZKK0706)Y.-D.L.is supported by a scholarship granted by the China Scholarship Council(202108320010).
文摘Dear Editor,The Cretaceous-Paleogene(K-Pg)mass extinction precipitated one of the most profound restructurings of biodiversity in recent geological history.Despite the extinction of many iconic groups,particularly the non-avian dinosaurs,there is emerging evidence that previously overlooked taxa experienced stark morphological and evolutionary stasis.In this study,we report both adult and larva of beetles of the genus Loricera preserved in mid-Cretaceous Kachin amber(Figure 1),which display striking similarity to extant congeners,indicating a stasis of their specialized feeding behavior persisting at least 100 million years.
