Szaferomyces pliocenicus nov. gen., nov. sp. from the Upper Pliocene deposits of Mizerna (Poland), a fossil fungus showing close resemblance to modern powdery mildews

IF 1.6 4区地球科学 Q2 PALEONTOLOGY Geobios Pub Date : 2023-08-01 DOI:10.1016/j.geobios.2023.05.006

Grzegorz Worobiec, Marcin Piątek, Elżbieta Worobiec

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Abstract

A fungal chasmothecium-like structure resembling those of the contemporary members of the Erysiphaceae was found during palynological investigations of Upper Pliocene deposits from Mizerna (borehole Mizerna-Nowa), southern Poland. This chasmothecium-like remain, preserved without any asci, ascospores and mycelium attached, is morphologically most similar to the chasmothecia of modern powdery mildews from the genera Erysiphe, Neoerysiphe, Podosphaera, and Salmonomyces. It differs from hitherto described fossil or modern fungi producing globose, closed ascomata with appendage-like setae. Therefore, a new fossil-genus and species name, Szaferomyces pliocenicus, is introduced for the fossil remains from Mizerna. Contrary to all previous putative fossils of powdery mildews, Szaferomyces pliocenicus nov. gen., nov. sp. is the most probable fossil of spore-producing organs of the Erysiphaceae found so far. However, due to the absence of some diagnostic morphological structures (other than presumptive chasmothecium) and DNA data, the affinity of this fungal fossil remains unclear.

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Szaferomyces pliocenicus nov. gen.， nov. sp.，来自米泽尔纳(波兰)上新世上部沉积物，一种与现代白粉病非常相似的真菌化石

在对波兰南部Mizerna (Mizerna- nowa钻孔)上新世沉积物的孢粉学调查中发现了一种类似于当代丹参科成员的真菌裂孔状结构。这种无子囊孢子、子囊孢子和菌丝体附着的裂囊样残留，在形态上与现代白粉病的裂囊最相似，这些白粉病属包括赤霉属、新赤霉属、Podosphaera和沙门氏菌属。它不同于迄今为止描述的化石或现代真菌产生球形，封闭的ascomata具附属物样刚毛。因此，为米泽尔纳的化石遗骸引入了一个新的化石属和物种名称——Szaferomyces pliocenicus。与以往所有假定的白粉病化石相反，Szaferomyces pliocenicus nov. gen.， nov. sp.是迄今为止发现的最可能的白粉病科产孢子器官化石。然而，由于缺乏一些诊断形态结构(除了推定的裂囊)和DNA数据，这种真菌化石的亲和力仍然不清楚。

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来源期刊

Geobios 地学-古生物学

CiteScore

3.30

自引率

6.20%

发文量

审稿时长

6-12 weeks

期刊介绍： Geobios publishes bimonthly in English original peer-reviewed articles of international interest in any area of paleontology, paleobiology, paleoecology, paleobiogeography, (bio)stratigraphy and biogeochemistry. All taxonomic groups are treated, including microfossils, invertebrates, plants, vertebrates and ichnofossils. Geobios welcomes descriptive papers based on original material (e.g. large Systematic Paleontology works), as well as more analytically and/or methodologically oriented papers, provided they offer strong and significant biochronological/biostratigraphical, paleobiogeographical, paleobiological and/or phylogenetic new insights and perspectices. A high priority level is given to synchronic and/or diachronic studies based on multi- or inter-disciplinary approaches mixing various fields of Earth and Life Sciences. Works based on extant data are also considered, provided they offer significant insights into geological-time studies.