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Title(2450-2451) Proposals to conserve the names Selenopemphix against Margosphaera, and S. nephroides against M. velata (Dinophyceae)
AuthorFensome, R A; Bijl, P; Grothe, A; Head, M; Sangiorgi, F; Williams, G
SourceTaxon vol. 65, issue 3, 2016 p. 636-637, https://doi.org/10.12705/653.21
Year2016
Alt SeriesEarth Sciences Sector, Contribution Series 2016001
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
Subjectspaleontology; stratigraphy; Paleogene; Oligocene; systematic paleontology; taxonomy; nomenclature; microfossils; sedimentary environment; paleoenvironment; biostratigraphy; paleoecology; Dinoflagellates; Dinophyceae; Selenopemphix; Selenopemphix nephroides; Margosphaera; Margosphaera velata; dinoflagellate cysts; stratigraphic markers; Phanerozoic; Cenozoic; Tertiary
ProgramBaffin Petroleum Systems, GEM2: Geo-mapping for Energy and Minerals
Abstract(unpublished)
The name Selenopemphix Benedek was proposed in 1972, typified by an Oligocene fossil dinoflagellate cyst: since then it has been recorded and described extensively from the Cenozoic, including modern, deposits. Its species are used as stratigraphic markers and (paleo)environmental indicators. The publication of the names Selenopemphix and S. nephroides was preceded by publication of the names Margosphaera and M. velata by Nagy (l.c.) in 1965, based on types from the Miocene of Hungary. Nagy considered Margosphaera to represent 'leiosphaerids' (smooth-walled acritarchs) rather than dinoflagellates: as a result, Margosphaera and M. velata were subsequently almost completely overlooked by dinoflagellate researchers. In retrospect, the morphology of M. velata is practically identical to that of S. nephroides, and unless the names Selenopemphix and S. nephroides are conserved against Margosphaera and M. velata respectively, major taxonomic changes would be necessary that would have a seriously destabilizing effect on dinoflagellate nomenclature. The impact would indeed extend beyond dinoflagellate taxonomy.
Summary(Plain Language Summary, not published)
The fossil and modern dinoflagellate cyst genus and species, Selenopemphix and Selenopemphix nephroides, are widely used in biostratigraphic and paleoenvironmental studies. One of the principles of botanical nomenclature is that the earliest name must be used for a taxon unless formally conserved through an official process involving publication of the problem, and support by standing committees. The two names mentioned above are threatened by the rediscovery of earlier, obscurely published names Margosphaera and Margosphaera velata. The renaming would cause instability in the literature, especially as the names Selenopemphix and S. nephrodes are used outside systematic palaeontology. Hence we are proposing conservation of the later names.
GEOSCAN ID297857