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TitleTaxonomy and nomenclature in palaeopalynology: basic principles, current challenges and future perspectives
AuthorGravendyck, JORCID logo; Fensome, R A; Head, M JORCID logo; Herendeen, P SORCID logo; Riding, J BORCID logo; Bachelier, J BORCID logo; Turland, N JORCID logo
SourcePalynology 2021 p. 1-27, Open Access logo Open Access
Alt SeriesNatural Resources Canada, Contribution Series 20210005
PublisherTaylor & Francis
Mediapaper; on-line; digital
File formatpdf
Subjectspaleontology; Nature and Environment; Science and Technology; palynology; systematic palynology; taxonomy; nomenclature; fossil plants; microfossils; biostratigraphy; paleoenvironment; evolution; paleoclimatology; oceanography; sampling techniques; sample preparation; palynomorphs; Shenzhen Code; Best practices
Illustrationsflow diagrams; sample forms; charts; photographs; photomicrographs
ProgramScience Laboratory Network
Released2021 06 07
AbstractEffective communication of taxonomic concepts is crucial to meaningful application in all biological sciences, and thus the development and following of best practices in taxonomy and the formulation of clear and practical rules of nomenclature underpin a wide range of scientific studies. The International Code of Nomenclature for algae, fungi and plants (the Code), currently the Shenzhen Code of 2018, provides these rules. Although early versions of the Code were designed mainly with extant plants in mind, the Code has been increasingly used for fossil plants and, in recent decades, for organic-walled microfossils, the study of which is called palaeopalynology, or simply palynology. However, rules embodied in the Code do not fully reflect the needs and practices of this discipline; and taxonomic practices between fossil applications, especially in palynology, have tended to diverge from practices for extant plants. Differences in these rules and practices present specific challenges. We therefore review the Shenzhen Code as it applies to palynology, clarifying procedures and recommending approaches based on best practices, for example, in the designation and use of nomenclatural types. The application of nomenclatural types leads to taxonomic stability and precise communication, and lost or degraded types are therefore problematic because they remove the basis for understanding a taxon. Such problems are addressed using examples from the older European literature in which type specimens are missing or degraded. A review of the three most important conventions for presenting palynological taxonomic information, synonymies, diagnoses/descriptions and illustrations, concludes with recommendations of best practices. Palynology continues to play an important role in biostratigraphy, palaeoenvironmental analyses, and evolutionary studies, and is contributing increasingly to our understanding of past climates and ocean systems. To contribute with full potential to such applied studies, consistent communication of taxonomic concepts, founded upon clear rules of nomenclature, is essential.
Summary(Plain Language Summary, not published)
All life is classified into taxa, of which the most familiar are genera and species. The process of classification of organisms is "taxonomy", and the process of naming taxa is "nomenclature". Taxonomy is based on opinions of scientists, and is subject to change as knowledge progresses. Nomenclature is subject to rules governed by international bodies. In botanical nomenclature rules were developed for classical botany, but have been adapted for fossil plants, including palynomorphs (organic-walled microfossils). In this paper we review the taxonomy and nomenclature of palynomorphs and recognize problems that need to be addressed to overcome difficult situations (e.g. how to deal with lost and ambiguous material on which names are based) and achieve best practices. These are important issues if we are to achieve consistent communication among researchers and meaningful applications such as biostratigraphic and paleoenvironmental interpretations.

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