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When the International Fossil Plant Names Index (IFPNI; http://ifpni.org/) was established in 2014 as a global registry of scientific names of fossil organisms covered by the I International Code of Nomenclature for algae, fungi, and plants i ( I ICN i ; Turland & al. in Regnum Veg. 2017) illustrates the situation where a fossil-genus name now applied to a fossil charophycean alga was originally described as a fossil animal prior to the starting-point of palaeobotanical nomenclature (1820, the starting-point for fossil nomenclature in the I ICN i , Art. Numerous such names were treated as available under the I ICZN i without fully referenced basionyms or replaced synonyms, in contradiction to the requirement of I ICN i Art. If a taxon originally assigned to a group not covered by this I Code i is treated as belonging to the algae or fungi, any of its names need satisfy only the requirements of the relevant other I Code i that the author was using for status equivalent to valid publication under this I Code i (but see Art. [Extracted from the article]

New acritarch data from the Kistedalen Formation based on two sections with continuous exposure enable us to establish the most detailed Miaolingian acritarch biozonation in Baltica to date. Six interval zones previously established in Gondwana, the Eliasum llaniscum, Cristallinium cambriense, Adara alea, Timofeevia lancarae, Cristallinium dubium and Vulcanisphaera turbata zones, are identified, and their correlations within the Acado‐Baltic Province examined. The diagnoses of Retisphaeridium, Cristallinium, Retisphaeridium dichamerum, Retisphaeridium lechistanium, Cristallinium dubium and Cristallinium cambriense are emended and the new species Retisphaeridium rugulatum sp. nov. and Retisphaeridium minimum sp. nov. are described. The diagnosis of Retisphaeridium ovillense (Cramer & Díez) Vanguestaine is emended and the species assigned to Dictyotidium ovillense comb. nov. The main evolutionary changes of the placoid acritarchs during the Miaolingian are analysed. Comparison with previous acritarch data from the Kistedalen Formation suggests that different extraction methodologies may result in significant bias in the recovered fossil record. [ABSTRACT FROM AUTHOR]

The Pin Formation of the northern Indian Himalaya may contain a record of the late Katian (Late Ordovician) warming event (the Boda Event). Palynological samples collected from two members of this formation are investigated in order to evaluate the biostratigraphical potential of the different microfossil groups. Acritarchs and chitinozoans are the most abundant microfossils, but fragments of scolecodonts and melanosclerites are also present. Several of the acritarchs from the Pin Formation are long-ranging through the lower Palaeozoic, but other taxa can be compared to Upper Ordovician (Katian) assemblages described from other parts of the world. The chitinozoan assemblages, consisting of 13 species (including those in open nomenclature) belonging to seven genera, are mainly recorded from two layers. The chitinozoan assemblage collected from the sample at 87.3 m in the uppermost part of the Farka Muth Member, and that collected at 184.89 m from the Takche Member, indicate a late Katian age. This age interpretation is in accordance with conodont data from the Takche Member, a positive carbon isotopic peak from the top of a shale unit in the Takche Member, and the initial part of the rapid negative shift of the Paroveja isotopic excursion related to the Boda Event of late Katian age. Further detailed studies with a higher number of samples are needed, that describe better preserved and more diversified palynomorph assemblages, which would help to more precisely refine the Upper Ordovician biostratigraphy in this area. [ABSTRACT FROM AUTHOR]