Vol 59, No 1-2 (2025)
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- Category: Vol 59, No 1-2 (2025)
Authors: Jiří Bek
Full version (3,474 kB)Abstract: The paper reports records of in situ spores of Paleozoic early land plants totalling 44 genera with 72 species (including four subspecies). Their reproductive organs yielded in situ spores belonging to 3 cryptospore species and 18 spore genera with 59 species. All descriptions of in situ spores have been modified employing current terminology for the description of Paleozoic spores. In situ spores of early plants are usually small, morphologically simple and can be divided into a few morphological groups. The most abundant spore genera are Apiculiretusispora, Retusotriletes and Ambitisporites.
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- Category: Vol 59, No 1-2 (2025)
Authors: Jana Votočková Frojdová, Ondřej Koukol, Stanislav Opluštil, Josef Pšenička & Jiří Bek
Abstract: The paper documented, branched hyphae preserved on the adaxial cuticle of pinnules of the Pennsylvanian leptosporangiate fern Discosoropteris chlupatum Pšenička et al. from the Whetstone Horizon, Radnice Member, Kladno Formation of the Pilsen Basin, Czech Republic. The hyphae occur as running structures on the leaf surface, show simple septa and lack clamp connections, consistent with an ascomycete affinity. Exceptional host-tissue preservation indicates rapid burial by volcanic ash and supports epiphyllous colonisation, most plausibly parasitic, although early saprotrophic colonisation cannot be excluded. This record expands the limited evidence of Paleozoic foliar fungi preserved as compressions and highlights the potential of volcaniclastic deposits for detecting plant–fungus associations.
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- Category: Vol 59, No 1-2 (2025)
Authors: Tomáš Kočí & Martina Kočová Veselská
Abstract: RNDr Ctirad Sviták was our colleague and friend in the field. Although he was not widely known in the broader scientific community, he was an active and engaged person. He was a member of several organizations, including Palaia, the Guard of Nature for Prague and the Central Bohemian Region. His interests went far beyond micropaleontology, he was also a journalist, a Ministry of Education official, a nature conservationist, and a keen observer of history and politics. This text is written in remembrance of his active and diverse life, and to ensure that his work, curiosity, and personality are not forgotten.
