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TitleThe Lentin and Williams index of fossil dinoflagellates
AuthorFensome, R A; Williams, G L; MacRae, R A
SourceAmerican Association of Stratigraphic Palynologists, Contribution Series no. 50, 2019, 1173 pages Open Access logo Open Access
LinksOnline - En ligne
Alt SeriesNatural Resources Canada, Contribution Series 20190202
PublisherAmerican Association of Stratigraphic Palynologists Foundation
Mediaon-line; digital
File formatpdf
Subjectspaleontology; Nature and Environment; Science and Technology; systematic paleontology; microfossils; taxonomy; nomenclature; Dinoflagella
ProgramGEM: Geo-mapping for Energy and Minerals Baffin Bay Sedimentary Basins - Canadian Arctic Petroleum Systems East (CAPSE)
Released2019 10 01
AbstractIncluded in this 2019 edition of the Lentin and Williams Index are all fossil dinoflagellate taxa at and below generic rank known to the authors as of 30 September 2019. The main part of the Index now has 672 generic and 4,536 specific 'correct' names, and includes in total 10,233 entries; the 2019 edition has 338 new taxonomic entries. There are 2,112 references in total, of which 73 are new to the Index. Validly published and legitimate names are listed, as well as those that are effectively published, but are not valid or are illegitimate. Information on synonymies, nomenclatural types, nomenclatural status, history, and geologic age is also provided. Names may now be effectively published online, sometimes before the article is finally paginated; this has led to some confusion, especially when the first online publication (Version of Record) and paginated version appear in different years. For the purposes of this work, we use the year of the Version of Record (as prescribed by the nomenclatural rules) and final pagination, where available, for all citations, regardless of the issue-year of the latter. The age cited for each taxon of specific or infraspecific rank is, unless otherwise specified, that attributed to it in the protologue. It is not intended to be a full or up-to-date statement of the range of the species, and users are urged to consult the literature for more detailed and/or accurate age information. Proposals in this edition include: one new name (Hystrichosphaeridium moerense), necessary because of the inadvertent creation of a homonym in the literature; and nine new combinations (Amphorulacysta ruvuese, Andalusiella punctata, Chlamydophorella angusta, Chlamydophorella attenuata, Chlamydophorella lowii, Elimatia spinosa, Pithonella gracillimoides, Sentusidinium? ovatum and Sentusidinium shangsicum), made necessary mainly by generic synonymys in the literature. Appendix A lists all non-dinoflagellate genera that at some time have included species or infraspecific taxa now or previously considered dinoflagellates; it also includes genera listed in the main text of earlier editions of the Index but not (now) considered dinoflagellates. Appendix B includes extant dinoflagellate genera based on motile types to which cyst taxa have been assigned. This edition of the Index is a digital publication and is released in parallel with a new version of the DINOFLAJ database, DINOFLAJ4 (
Summary(Plain Language Summary, not published)
In order for fossil groups to successfully contribute to stratigraphy, paleoecology and other applications, it is necessary for there to be a consistent taxonomy (classification) and nomenclature. Such consistency acts as a common language among specialists that promotes meaningful communication and common understanding of species concepts ('a rose by any other name leads to confusion'). The Lentin and Williams Index serves as a common dictionary among workers on fossil dinoflagellates, and has done so through several editions since 1973. As a published document (necessary to fulfill international rules of nomenclature), it is the basis for an online database know as DINOFLAJ, now in its 4th edition. Having such a standardizing index is a major reason why dinoflagellates have been so successfully used to date Mesozoic-Cenozoic strata in sedimentary basins such as the GEM Baffin Region of Interest.

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