NINADIACRODIUM: A NEW LATE CAMBRIAN ACRITARCH GENUS AND INDEX FOSSIL

Abstract

Research Article| January 01, 2009 NINADIACRODIUM: A NEW LATE CAMBRIAN ACRITARCH GENUS AND INDEX FOSSIL ELENA G. RAEVSKAYA; ELENA G. RAEVSKAYA FGUNPP “Geologorazvedka”, Knipovich str., 11 bld. 2, 192019 Saint Petersburg, Russia, e-mail: elena_raevskaya@hotmail.com Search for other works by this author on: GSW Google Scholar THOMAS SERVAIS THOMAS SERVAIS Laboratoire de Paléontologie et Paléogéographie du Paléozoïque, UMR 8157 du CNRS Géosystèmes, USTL, SN5, F-59655 Villeneuve-d’Ascq Cedex, France, e-mail: thomas.servais@univ-lille1.fr Search for other works by this author on: GSW Google Scholar Palynology (2009) 33 (1): 219–239. https://doi.org/10.2113/gspalynol.33.1.219 Article history first online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation ELENA G. RAEVSKAYA, THOMAS SERVAIS; NINADIACRODIUM: A NEW LATE CAMBRIAN ACRITARCH GENUS AND INDEX FOSSIL. Palynology 2009;; 33 (1): 219–239. doi: https://doi.org/10.2113/gspalynol.33.1.219 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu nav search search input Search input auto suggest search filter All ContentBy SocietyPalynology Search Advanced Search Abstract The acritarch Ninadiacrodium gen. nov. is erected to include forms with a basically triangular outline, but with a clearly bipolar arrangement of processes. It belongs to the ‘diacrodian’ clade; these are morphotypes with ornament and/or processes at the two opposite poles of the central body. They were extremely abundant and highly diverse during the Late Cambrian and Early Ordovician. The new genus includes the two widely-cited species Ninadiacrodium caudatum (Vanguestaine 1973) comb. nov. and Ninadiacrodium dumontii (Vanguestaine 1973) comb. nov. Both taxa are emended here. Ninadiacrodium is easily recognizable due to its elongate triangular shape, but is clearly differentiated from VeryhachiumDeunff 1954, which appears in the Ordovician. Ninadiacrodium is apparently confined to the Late Cambrian, and has a global distribution. It is therefore an index fossil for the Late Cambrian. You do not currently have access to this article.