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TitreComment to Wetzeliella and its allies - the "hole" story - a taxonomic revision of the Paleogene dinoflagellate subfamily Wetzelielloideae by Williams et al. (2015): a response
AuteurWilliams, G L; Damassa, S P; Fensome, R A; Guerstein, G R
SourcePalynology 2017 p. 1-8, https://doi.org/10.1080/01916122.2017.1283367
Année2017
Séries alt.Secteur des sciences de la Terre, Contribution externe 20160306
ÉditeurTaylor and Francis
Documentpublication en série
Lang.anglais
DOIhttps://doi.org/10.1080/01916122.2017.1283367
Mediapapier; en ligne; numérique
Formatspdf
Sujetstaxonomie; biostratigraphie
ProgrammeSystèmes pétroliers de Baffin, GEM2 : La géocartographie de l'énergie et des minéraux
Résumé(disponible en anglais seulement)
The paper by Williams et al. (2015) concerning a proposed taxonomic revision of the subfamily Wetzelielloideae has led to a Comment by Bijl et al (2016) that questions the validity of our assumptions concerning recognition of the equiepeliform, latiepeliform, hyperepeliform and soleiform archaeopyle types and their significance at the generic level. In this note we address the points that they raise, which are: the introduction of taxonomic criteria allegedly not followed in other fossil subfamilies; the erection of too many taxa; the unworkable nature of the proposed classification; and the reduction of stratigraphic applicability of many significant stratigraphic marker species. We have organized our response under the following topics: pragmatism versus theory; generic criteria: intergroup consistency; the genus Apectodinium and operculum attachment; stratigraphic utility; the number of taxa; and recognition problems. We also discuss specimens illustrated in the two plates included with the Comment. The variations in archaeopyle shapes and types of attachment of the operculum (the latter concept has been modified following more recent research) that we have used in part to separate the genera within the Wetzelielloideae have been previously applied to other peridiniaceans subfamilies, most notably the Deflandreoideae. As with that subfamily, we consider that our focus on archaeopyle shape and operculum attachment for differentiating wetzelielloidean genera introduces an approach that may help refine the stratigraphic ranges of individual species. While it is a fundamental truth that there are no 'correct' taxonomic ideas, we consider that new approaches should be tested with usage over time, not rejected out of hand without careful study.
Résumé(Résumé en langage clair et simple, non publié)
Cet article est une réponse à un commentaire par Bijl et al (2016) sur un papier par Williams et al., (2015) concernant une proposition de révision de la classification de la sous-famille des kystes de dinoflagellés Wetzelielloideae. Nous justifier notre proposition de révision, qui conduira à plus cohérentes et précises des déterminations biostratigraphiques dans la région de Baffin et ailleurs, les zones en cours d'étude dans le programme GEM.
GEOSCAN ID299614