Archaeosporites rhyniensis gen. et sp. nov. (Glomeromycota, Archaeosporaceae) from the Lower Devonian Rhynie chert: a fungal lineage morphologically unchanged for more than 400 million years
| Autor: | Christopher Walker, Andrew B. Schwendemann, Michael Krings, Hans Kerp, Carla J. Harper |
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| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
010506 paleontology biology Fossils Lineage (evolution) Plant Science Original Articles biology.organism_classification 01 natural sciences Biological Evolution Devonian Archaeosporales Glomeromycota Taxon Genus Mycorrhizae Botany Key (lock) Embryophyta 010606 plant biology & botany 0105 earth and related environmental sciences Rhynie chert |
| Zdroj: | Ann Bot |
| ISSN: | 1095-8290 |
| Popis: | Background and Aims Structurally preserved arbuscular mycorrhizas from the Lower Devonian Rhynie chert represent core fossil evidence of the evolutionary history of mycorrhizal systems. Moreover, Rhynie chert fossils of glomeromycotan propagules suggest that this lineage of arbuscular fungi was morphologically diverse by the Early Devonian; however, only a small fraction of this diversity has been formally described and critically evaluated. Methods Thin sections, previously prepared by grinding wafers of chert from the Rhynie beds, were studied by transmitted light microscopy. Fossils corresponding to the description of Archaeospora spp. occurred in 29 slides, and were measured, photographed and compared with modern-day species in that genus. Key Results Sessile propagules Conclusions The fossils can be assigned with confidence to the extant family Archaeosporaceae, but because molecular analysis is necessary to place organisms in these taxa to present-day genera and species, they are placed in a newly proposed fossil taxon, Archaeosporites rhyniensis. |
| Databáze: | OpenAIRE |
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