The genus Hausmannia (Dipteridaceae) in the Cretaceous of the North-East of Russia and its paleobiogeographic implications

Golovneva, L. B.; Grabovskiy, A. A.

doi:10.1016/j.cretres.2018.09.001

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…Later, towards the Upper Triassic and Lower Jurassic, the family shows an increase in richness and diversity ( Tidwell and Ash, 1994 ; Rees and Cleal, 2004 ). Dipteridaceae records decrease significantly globally from the late Jurassic and throughout the Late Cretaceous, being almost exclusively represented by the genus Hausmannia ( Feruglio, 1937 ; Cantrill, 1995 ; Stockey et al , 2006 ; Golovneva and Grabovskiy, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

Fertile Goeppertella from the Jurassic of Patagonia: mosaic evolution in the Dipteridaceae-Matoniaceae lineage

2023

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Background and Aims Goeppertella has been postulated as a monophyletic group, whose precise position within the Gleichenoid families Dipteriaceae and Matoniaceae, remains poorly understood. Previously described Goeppertella specimens are based on frond fragments and its fertile morphology is represented by a few, poorly preserved specimens. We describe a new species based on the largest collection of fertile specimens known to date, and discuss the evolutionary history of the genus based on the additional reproductive characters provided by the fossils described. Methods Plant impressions were collected in Early Jurassic sediments of Patagonia, Argentina. The specimens were described, and silicone rubber casts were developed to examine in detail vegetative and reproductive features. The new species was compared with other Goeppertella species. Finally, a backbone analysis was performed in the context of a previously published combined matrix of Dipteridaceae, using the maximum parsimony criterion. Key Results The new species is described based on a combination of features that have not been previously reported. The vegetative morphology shows affinities with most fossil and extant Dipteriaceae, contrasting with the reproductive morphology which is more comparable with the scarce number of fossil dipteridaceous forms and it is more spread in the sister family, Matoniaceae. The backbone analysis indicates that the position of the new species vary among different positions among Dipteridaceae and Matoniaceae. Additional analyses, discriminating the signal of reproductive and vegetative character, are provided to discuss the base of this uncertainty. Conclusions We consider Goeppertella as a member of the family Dipteridaceae since we interpret most shared features with Matoniaceae as plesiomorphic conditions for the family. In contrast, most shared features with Dipteridaceae represent apomorphies for the group. Thus, Goeppertella would represent an early diverging genus in Dipteridaceae, considering the venation characters as the most important in order to define the family.

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Section: Introductionmentioning

confidence: 99%

Fertile Goeppertella from the Jurassic of Patagonia: mosaic evolution in the Dipteridaceae-Matoniaceae lineage

2023

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“…Other than in angiosperms, reticulate venation has been in several fossil taxa, including ferns (Clathropteridaceae, Dipteridaceae, Polypodiaceae), uncertain group (Gigantopteridales), seed plants (Glossopteridales, Caytoniales, Ginkgoales, Cycadales, Gnetales, angiosperms, uncertain groups) (Table 1). Therefore the occurrence of reticulate venation does not ensure that a taxon with reticulate venation is an angiosperms [9][10][11][12].…”

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An Intriguing Half Leaf from the Middle Jurassic of China

2023

Geol Earth Mar Sci

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Most leaves in angiosperms have reticulate venation, but not all leaves with reticulate venation belong to angiosperms. Although angiosperms flowers have been reported in the Jurassic, leaves similar to angiosperms are lacking in the Jurassic. Here we report an unnamed fossil leaf from the Middle Jurassic Yan'an Formation of Ningxia, China. Although its partial preservation does not allow us to determine the affinity of the fossil, its occurrence underscores the probablity that future digging may uncover angiosperm leaves in the Jurassic.

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The genus Hausmannia (Dipteridaceae) in the Cretaceous of the North-East of Russia and its paleobiogeographic implications

Cited by 2 publications

References 21 publications

Fertile Goeppertella from the Jurassic of Patagonia: mosaic evolution in the Dipteridaceae-Matoniaceae lineage

Fertile Goeppertella from the Jurassic of Patagonia: mosaic evolution in the Dipteridaceae-Matoniaceae lineage

An Intriguing Half Leaf from the Middle Jurassic of China

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