Fossil floras from the Emma Fiord Formation (Viséan, Mississippian) of the Canadian Arctic Archipelago and their paleoenvironmental context

Leslie, Andrew B.; Pfefferkorn, Hermann W.

doi:10.1016/j.revpalbo.2009.12.006

Cited by 3 publications

(2 citation statements)

References 27 publications

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“…1996; Wagner 2003; Dunn 2004; Greb et al . 2006; Leslie & Pfefferkorn 2010; Wagner & Álvarez‐Vázquez 2010; Orlova et al . 2015; Luo et al .…”

Section: Discussionunclassified

“…Mississippian macroflorals, constituting the Lepidodendropsis flora, are fairly uniform with little provincialism over most palaeotropical regions of Laurussia and Cathaysia (Lacey & Eggert 1964;Vakhrameev et al 1970;Novik 1974;Scott et al 1984Scott et al , 1986Scott et al , 1994Jennings 1986; Wang et al 1996;Wagner 2003;Dunn 2004;Greb et al 2006;Leslie & Pfefferkorn 2010;Wagner & Alvarez-V azquez 2010; Orlova et al 2015;Luo et al 2020;Strullu-Derrien et al 2021;Lucas et al 2022;Oplu stil et al 2022). The absence of metareticuloid in situ spores and gleichenioid macroremains from that time may relate to evolution of the first gleichenioid plants in environments with unfavourable preservational settings or to a peculiar ecological strategy that reduced preservation potential.…”

Section: Evolutionary Implicationsmentioning

confidence: 99%

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Maiaspora: the hallmark of gleichenioid ferns (Gleicheniales) from the early Carboniferous

Mamontov,

McLean,

Gavrilova

2024

Papers in Palaeontology

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The Palaeozoic origin of gleichenioid ferns (Gleicheniales) has aroused curiosity for almost a century. The oldest definite sign of this ancient clade is the spore wall ultrastructure of Radiitheca dobranyana from the Moscovian of central Europe. However, familial assignment of this fern fossil is uncertain. A comparison of its in situ spores with those of the dispersed genus Maiaspora, from the Visean, suggests that they may represent the same group of leptosporangiates. Although these spores have a common metareticuloid sculpture, the ultra‐thin structure of the dispersed counterparts remained unknown. Study of the ultrastructure of Maiaspora concava and M. panopta from central Russia and Northumberland (UK) using transmission electron microscopy shows that the wall of Maiaspora has a middle exospore layer composed of foliated lamellae. These spread from the base of the aperture slit to the subequatorial margins of kyrtome areas. The lamellae do not overlap the aperture slit and terminate at between two‐thirds and three‐quarters of the slit height. The miospores have a three‐layered exospore in the interradial areas, while non‐apertural parts of the exospore consist of two layers. Such an ultrastructure is shared by extant Gleicheniales and fossil R. dobranyana. The combined evidence from the morphology, ultrastructure and spatiotemporal distribution of Maiaspora, as well as radioisotope dating and additional plant macrofossils, suggests that the origin of the Gleicheniales stem was related to closure of the Rheic Ocean. Apparently, the first Maiaspora‐producing gleichenioids emerged as neoendemic terrestrial ferns on the peri‐Gondwanan volcanic arcs.

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“…1996; Wagner 2003; Dunn 2004; Greb et al . 2006; Leslie & Pfefferkorn 2010; Wagner & Álvarez‐Vázquez 2010; Orlova et al . 2015; Luo et al .…”

Section: Discussionunclassified

Section: Evolutionary Implicationsmentioning

confidence: 99%

Maiaspora: the hallmark of gleichenioid ferns (Gleicheniales) from the early Carboniferous

Mamontov,

McLean,

Gavrilova

2024

Papers in Palaeontology

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Enigmatic fossil plants with three-dimensional, arborescent-growth architecture from the earliest Carboniferous of New Brunswick, Canada

Gastaldo,

Gensel,

Glasspool

et al. 2024

Current Biology

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Viséan Fossil Plants from the Jiujialu Formation in Central Guizhou Province: Implications for Age of Bauxite and Palaeoenvironment

Luo

Yang

Gao

et al. 2020

Acta Geologica Sinica (Eng)

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Fossil plants from the carbonaceous shale of upper part of the Lower Carboniferous Jiujialu Formation in Lindai bauxite deposit fill a gap regarding the distribution of Early Carboniferous flora in Central Guizhou Province. Here the Lindai plant assemblage is systematically described, and its composition and geological age are discussed. Research demonstrates that 9 species in 6 genera of the fossil plants are discovered in this study, and they belong to lycopsids, sphenopsids and ferns, respectively. Based on the analysis of the floral composition, the geological age of the Lindai plant assemblage belongs to the Early Carboniferous Viséan. The discovery of Lindai plant assemblage not only provides a new fossil evidence to restrict the age of bauxite deposits in Lower Carboniferous Jiujialu Formation of Central Guizhou Province, but also has great significance to further research the palaeoecological setting and floral evolution during the Early Carboniferous.

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Fossil floras from the Emma Fiord Formation (Viséan, Mississippian) of the Canadian Arctic Archipelago and their paleoenvironmental context

Cited by 3 publications

References 27 publications

Maiaspora: the hallmark of gleichenioid ferns (Gleicheniales) from the early Carboniferous

Maiaspora: the hallmark of gleichenioid ferns (Gleicheniales) from the early Carboniferous

Enigmatic fossil plants with three-dimensional, arborescent-growth architecture from the earliest Carboniferous of New Brunswick, Canada

Viséan Fossil Plants from the Jiujialu Formation in Central Guizhou Province: Implications for Age of Bauxite and Palaeoenvironment

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