A microfossil with suggested affinities to the Peronosporomycetes (Oomycota) from the Carboniferous (c. 330 Ma) of France

Carla J. Harper; Michael Krings; Jean Galtier; Thomas N. Taylor

A microfossil with suggested affinities to the Peronosporomycetes (Oomycota) from the Carboniferous (c. 330 Ma) of France

Carla J. Harper ¹ Michael Krings ^{1, 2} Jean Galtier ³ Thomas N. Taylor ¹

1 Department of Ecology and Evolutionary Biology, University of Kansas

2 Bayerische Staatssammlung für Paläontologie und Geologie und GeoBio-Center

3 UMR AMAP - Botanique et Modélisation de l'Architecture des Plantes et des Végétations

Abstract : Combresomyces cornifer is a conspicuous spheroidal microfossil (<40 μm diam.) that occurs in Mississippian (~330 Ma) chert from France and is characterized by a prominent surface ornament of antler-like extensions positioned on hollow, conical or column-like wall papillations. The fossil has been interpreted as a peronosporomycete oogonium based on appressed paragynous antheridia. Here we report Annelaurea excornis nov. gen. et sp., a new fossil from the French Mississippian chert that resembles C. cornifer in overall morphology, but is distinctly thicker-walled and lacks the antler-like extensions. Moreover, size and shape of the papillations vary greatly within one specimen. This discovery suggests that by the Carboniferous the peronosporomycetes were already a morphologically diverse group

Keywords : AMPHIGYNOUS ANTHERIDIUM COMBRESOMYCETACEAE Neck Oogonium Stalk Oospore Palaeobotany Carboniferous

Document type :

Journal articles

Domain :

Environmental Sciences / Biodiversity and Ecology

Life Sciences [q-bio] / Vegetal Biology

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https://hal-sde.archives-ouvertes.fr/hal-01392373
Contributor : Yannick Brohard <>
Submitted on : Friday, November 4, 2016 - 12:05:47 PM
Last modification on : Friday, March 29, 2019 - 9:10:41 AM

A microfossil with suggested affinities to the Peronosporomycetes (Oomycota) from the Carboniferous (c. 330 Ma) of France

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A microfossil with suggested affinities to the Peronosporomycetes (Oomycota) from the Carboniferous (c. 330 Ma) of France

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