Middle–Late Jurassic fossils from northeastern China reveal morphological stasis in the catkin-yew

Dong, Chunxia; Shi, Gongle; Herrera, Fabiany; Wang, Yongdong; Herendeen, Patrick S.; Crane, Peter R.

doi:10.1093/nsr/nwaa138

Cited by 9 publications

(5 citation statements)

References 7 publications

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“…celebica . He noticed the sexine finely reticulate with OL‐pattern (Dong et al, 2020). Nigris, D'Apice, Moschin, Ciarle, and Baldan (2021) have given the equatorial diameter 12.2 (10–14) μm and polar diameter 9 (7–11) μm which differ from the present finding.…”

Section: Discussionmentioning

confidence: 99%

Morpho‐palynological investigation of gymnospermal flora from subalpine and alpine zones of northern Pakistan using LM and SEM

Kayani

Hussain

Ahmad

et al. 2021

Microscopy Res & Technique

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The pollen morphology, with special reference to exine sculpture, of some species of the gymnosperms was assessed for the first time from the subalpine and alpine zones of western Himalayas northern Pakistan. The pollen of all these species is airborne and allergenic, so pollen morphology helps for identification of this allergenic pollen at specific level. Different morpho-palynological characteristics were analyzed including size range of pollen, polar and equatorial diameter ratio, exine ornamentation, sculpturing, exine thickness, pollen type, and shape. For accurate and quick identification of species, taxonomic key was made based on different morpho-palynological characteristics. The quantitative data were processed using SPSS software.Gymnospermal pollen includes inaperturate, rarely 1-colpate observed in (Cupressaceae), hexazonocolpate in (Ephedraceae), vesiculate, bissacate in (Pinaceae), and inaperturate in (Taxaceae). Different pollen shapes observed were prolate (4 spp), sub-spheroidal (7 spp), and oblate (1 spp). Variation was observed in exine sculpturing granular (4 spp), reticulate (1 spp), areolate-punctate (3 spp), and psilate (2 spp). This is based on the analysis of 10 plants belonging to four families of gymnosperms. Distinct pollen shape has emerged as the most diagnostic feature to separate some genera such as spheroidal in (Cupressaceae, Taxaceae), prolate and radiosymmetrical in (Ephedraceae), and bilateral in (Pinaceae). Exine thickness and sculpturing proved to be helpful at generic and specific levels. The results reinforced the significance of gymnospermal pollen morphological features which were used as aid for valuable taxonomic tool in plant systematics.

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Section: Discussionmentioning

confidence: 99%

Morpho‐palynological investigation of gymnospermal flora from subalpine and alpine zones of northern Pakistan using LM and SEM

Kayani

Hussain

Ahmad

et al. 2021

Microscopy Res & Technique

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“…in one of them. The Taxaceae are conifers with extremely reduced female reproductive organs that have persisted since the Jurassic (Dong et al, 2020(Dong et al, , 2022. How the very simple uniovulate organ originated has been a point of discussion in conifer evolution (e.g., Sahni, 1920;Florin, 1948;Keng, 1975;Shi & Wang, 1989) In Cephalotaxus, the female organ is a pedunculate spike and consists of a thickened cone axis bearing 3-8 pairs of decussate bracts, each bract with the exception of the proximal pair subtending two axillary ovules, while a ridge or protuberance is developed between the two ovules (Figure 2a-c, Lo & Wang, 2001).…”

Section: Morphology and De Velopmentmentioning

confidence: 99%

“…A very high diversity of cupressoid macrofossils was found in the early Mesozoic (Taylor et al, 2008 ), so the Cephalotaxaceae may have been rooted in one of them. The Taxaceae are conifers with extremely reduced female reproductive organs that have persisted since the Jurassic (Dong et al, 2020 , 2022 ). How the very simple uniovulate organ originated has been a point of discussion in conifer evolution (e.g., Sahni, 1920 ; Florin, 1948 ; Keng, 1975 ; Shi & Wang, 1989 ) and remains a mystery.…”

Section: Morphology and Developmentmentioning

confidence: 99%

An integrative view on the systematic position of the cupressophyteCephalotaxus

Yang,

Ferguson

et al. 2023

Ecology and Evolution

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We made an in‐depth review of historical studies of the cupressophyte conifer genus Cephalotaxus Siebold & Zucc. with an emphasis on its systematic position. We suggest that the systematic position of the genus is better understood using an integrative approach, so the evolution of phenetic characters is discussed within the context of recent phylogenomics. We propose that the genus should be classified as a separate family Cephalotaxaceae belonging to the clade consisting of Cupressaceae, Cephalotaxaceae, and Taxaceae; the family Cephalotaxaceae is sister to the Taxaceae but not nested within the Taxaceae and is characterized by a unique set of characters including morphology, anatomy, embryology, and chemistry. The family Cephalotaxaceae shows transitional characters between the Cupressaceae and the Taxaceae; the family possesses female cones with a primary cone axis bearing 5–8 pairs of decussate bracts, which is similar to the typical female cones of the Cupressaceae, on the one hand, and may have given rise to the reduced female cone of the Taxaceae with one terminal ovule partially or completely enclosed in a fleshy aril. In parallel, the compound male cone of the Cephalotaxaceae evolved into the seemingly “simple” male cones of the Taxaceae by means of reduction, elimination, and fusion.

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“…Fossil taxon and specimen: Palaeotaxus rediviva from the Rhaetian of southern Sweden. Phylogenetic justification: Palaeotaxus forms the first credible record of the family Taxaceae and was placed within Taxaceae in a phylogenetic analysis of morphological characters [115,116].…”

Section: C_43: Pinopsida: Taxaceae -Cupressaceaementioning

confidence: 99%

Divergent evolutionary trajectories of bryophytes and tracheophytes from a complex common ancestor of land plants

Harris

Clark

Schrempf

et al. 2021

Preprint

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The origin of plants and their colonization of land resulted in the transformation of the terrestrial environment. Here we investigate the evolution of the land plants (embryophytes) and their two main lineages, the tracheophytes (vascular plants) and bryophytes (non-vascular plants). We used new fossil calibrations, relative lineage dating implied by horizontal gene transfer, and new phylogenomic methods for mapping gene family origins. Distinct rooting strategies resolve tracheophytes and bryophytes as monophyletic sister groups that diverged during the Cambrian, 515-494 Ma. The embryophyte stem is characterised by a burst of gene innovation, while bryophytes subsequently experienced a no less dramatic episode of reductive genome evolution in which they lost genes associated with the elaboration of vasculature and the stomatal complex. Overall, our analyses confirm that extant tracheophytes and bryophytes are both highly derived; as a result, understanding the origin of land plants requires tracing character evolution across the diversity of modern lineages.

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Middle–Late Jurassic fossils from northeastern China reveal morphological stasis in the catkin-yew

Cited by 9 publications

References 7 publications

Morpho‐palynological investigation of gymnospermal flora from subalpine and alpine zones of northern Pakistan using LM and SEM

Morpho‐palynological investigation of gymnospermal flora from subalpine and alpine zones of northern Pakistan using LM and SEM

An integrative view on the systematic position of the cupressophyteCephalotaxus

Divergent evolutionary trajectories of bryophytes and tracheophytes from a complex common ancestor of land plants

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