Cretaceous asterid evolution: fruits of<i>Eydeia jerseyensis</i>sp. nov. (Cornales) from the upper Turonian of eastern North America

Atkinson, Brian A.; Martínez, Camila; Crepet, William L.

doi:10.1093/aob/mcy170

Cited by 11 publications

(7 citation statements)

References 28 publications

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“…In contrast to most major asterid groups, Cornales and Ericales both have an extensive Cretaceous fossil record tracing roughly to the Turonian‐Coniacian boundary, ~90 mya (e.g., Crepet et al., , 2018; Atkinson et al, , , b). These fossil reports, along with various molecular dating analyses (e.g., Wikström et al., ; Bremer et al., ; Bell et al., ; Magallón et al., ), indicate that Cornales and Ericales were actively diversifying in the early part of the Upper Cretaceous—perhaps spurred, at least in part, by these WGD events (Landis et al., ).…”

Section: Discussionmentioning

confidence: 99%

Nuclear phylogenomic analyses of asterids conflict with plastome trees and support novel relationships among major lineages

Stull

Soltis

et al. 2020

American J of Botany

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Premise Discordance between nuclear and organellar phylogenies (cytonuclear discordance) is a well‐documented phenomenon at shallow evolutionary levels but has been poorly investigated at deep levels of plant phylogeny. Determining the extent of cytonuclear discordance across major plant lineages is essential not only for elucidating evolutionary processes, but also for evaluating the currently used framework of plant phylogeny, which is largely based on the plastid genome. Methods We present a phylogenomic examination of a major angiosperm clade (Asteridae) based on sequence data from the nuclear, plastid, and mitochondrial genomes as a means of evaluating currently accepted relationships inferred from the plastome and exploring potential sources of genomic conflict in this group. Results We recovered at least five instances of well‐supported cytonuclear discordance concerning the placements of major asterid lineages (i.e., Ericales, Oncothecaceae, Aquifoliales, Cassinopsis, and Icacinaceae). We attribute this conflict to a combination of incomplete lineage sorting and hybridization, the latter supported in part by previously inferred whole‐genome duplications. Conclusions Our results challenge several long‐standing hypotheses of asterid relationships and have implications for morphological character evolution and for the importance of ancient whole‐genome duplications in early asterid evolution. These findings also highlight the value of reevaluating broad‐scale angiosperm and green‐plant phylogeny with nuclear genomic data.

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Section: Discussionmentioning

confidence: 99%

Nuclear phylogenomic analyses of asterids conflict with plastome trees and support novel relationships among major lineages

Stull

Soltis

et al. 2020

American J of Botany

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“…The maximum credibility tree of mean heights was then constructed using TreeAnnotator after discarding 20% trees as burn‐in. For estimation of divergence time using treePL, the configure file was set with the same fossil constraints but with the minimum age only and using 94 mya as the maximum age of the root (node uniting Cornus and Alangium ), slightly older than Eydeia jerseyensis , one of the oldest fossils of Cornales (Atkinson et al, 2018). We first conducted a priming analysis to determine the best optimization parameter values and performed a cross‐validation analysis to determine the optimal smoothing parameter value.…”

Section: Methodsmentioning

confidence: 99%

Rediscovery of the lost little dogwood Cornus wardiana (Cornaceae)—Its phylogenetic and morphological distinction and implication in the origin of the Arctic‐Sino‐Himalayan disjunction

Wahlsteen

Zhou

Xiang

et al. 2020

J of Sytematics Evolution

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The dwarf dogwoods (subgenus Arctocrania) have been widely known to consist of three circumboreal species Cornus suecica, Cornus canadensis, and Cornus unalaschkensis. A fourth putative species was discovered from the northern Myanmar in 1937, but it had never been formally reported on. Here, we formally report the species on the basis of phylogenetic and morphological evidence and name it Cornus wardiana Rushforth & Wahlsteen (sp. nov.). We conducted phylogenetic and morphometric analyses to determine its evolutionary relationship and differentiation from the existing relatives. We dated the phylogeny using molecular data and conducted a biogeographic analysis to gain insights into the evolution and biogeography of the Arctic‐Sino‐Himalayan disjunction. The phylogenetic analysis used sequences of the nrITS and plastid matK and rbcL genes and included all four dwarf dogwoods and 20 other species representing the three other major lineages of Cornus and the outgroup. The morphometric analyses included 60 populations and 102 specimens of dwarf dogwood, representing the entire range of the subgenus. The results showed that C. wardiana diverged first within subgenus Arctocrania in the Miocene, from a wide‐spread ancestor. Results from principal component analysis and discriminant analysis also showed that the Myanmar samples are well separated from the others. Taken together, these results suggest that the dwarf dogwood lineage split from the big‐bracted dogwoods in Asia or Asia‐western North America during the late Paleocene and spread widely to form a Eurasia‐North America distribution; the Arctic‐Sino‐Himalayan disjunction was the result of southward migration in the Miocene followed by extinction in the intervening highland areas.

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“…2002; Atkinson 2016; Atkinson et al . 2018, 2019). Phylogenetic analysis places these fossils within the grade of extinct taxa leading to the clade of extant nyssoids in core Cornales (Atkinson 2018).…”

Section: Discussionmentioning

confidence: 99%

“…2002; Atkinson et al . 2018, 2019). Several extinct cornalean taxa, Hironoia Takahashi, Crane & Manchester from the Coniacian of Japan (Takahashi et al .…”

Section: Figmentioning

confidence: 99%

First occurrence of Nyssa endocarps and associated fungi in the Oligocene of South China: palaeogeographical and palaeoecological significance

Kodrul

Маслова

et al. 2021

Papers in Palaeontology

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Co‐evolutionary relationships of plants and fungi are of great importance for the phylogeny of both groups. Nyssa was widely distributed in the northern hemisphere during the Cenozoic. Extant species of Nyssa exhibit a disjunct distribution between eastern North America, Central America and East Asia. Here, a new species, Nyssa nanningensis Xu & Jin, is described based on fruit endocarps from the upper Oligocene Yongning Formation of the Nanning Basin, South China. This new fossil record of Nyssa expands the known palaeogeographical distribution of the genus to the low latitudes of East Asia. Associated fossil fungal fruiting bodies on Nyssa endocarps are assigned to the new fossil genus and species, Yongnicta nyssae Tobias & Maslova. This new genus is similar to some members of extant wood destructor taxa Coronophorales and Amphisphaeriales (Sordariomycetes, Ascomycota). About 3% of the Nyssa endocarps studied were affected by Yongnicta nyssae. Low frequency of fruit damage indicates that endocarps could be released from mesocarps by animals eating fleshy parts of fruits, making them potentially available to wood‐destroying fungi.

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Cretaceous asterid evolution: fruits ofEydeia jerseyensissp. nov. (Cornales) from the upper Turonian of eastern North America

Cited by 11 publications

References 28 publications

Nuclear phylogenomic analyses of asterids conflict with plastome trees and support novel relationships among major lineages

Nuclear phylogenomic analyses of asterids conflict with plastome trees and support novel relationships among major lineages

Rediscovery of the lost little dogwood Cornus wardiana (Cornaceae)—Its phylogenetic and morphological distinction and implication in the origin of the Arctic‐Sino‐Himalayan disjunction

First occurrence of Nyssa endocarps and associated fungi in the Oligocene of South China: palaeogeographical and palaeoecological significance

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