Early Ordovician foraminifers from the Lava River Section, northwestern Russia

Abstract

Research Article| January 01, 2004 Early Ordovician foraminifers from the Lava River Section, northwestern Russia Galina P. Nestell; Galina P. Nestell 1Department of Geology, The University of Texas at Arlington, Arlington, TX 76019, USA Earth Crust Institute, St. Petersburg State University, St. Petersburg, Russia e-mail: gnestell@uta.edu Search for other works by this author on: GSW Google Scholar Tatiana Yu. Tolmacheva Tatiana Yu. Tolmacheva 2Department of Stratigraphy and Paleontology, All-Russian Geological Research Institute (VSEGEI), 199106 St. Petersburg, Russia e-mail: tatolm@hotmail.com Search for other works by this author on: GSW Google Scholar Micropaleontology (2004) 50 (3): 253–280. https://doi.org/10.2113/50.3.253 Article history received: 03 Mar 2004 accepted: 14 Jul 2004 first online: 06 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Galina P. Nestell, Tatiana Yu. Tolmacheva; Early Ordovician foraminifers from the Lava River Section, northwestern Russia. Micropaleontology 2004;; 50 (3): 253–280. doi: https://doi.org/10.2113/50.3.253 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search nav search search input Search input auto suggest search filter All ContentBy SocietyMicropaleontology Search Advanced Search Abstract Recent studies on the biostratigraphy and fauna of the Lower Ordovician successions of the Russian part of Baltoscandia have shown for the first time that agglutinated foraminifers are very numerous in the deposits of the lower part of the Latorp Russian Regional Stage in the vicinity of St. Petersburg, northwestern Russia. These forms were discovered in a classic section exposed on the left side of the Lava River canyon in the northern outskirts of the village of Vassilkovo. The lower part of the Latorp Regional Stage is represented in this section by unlithified sands and clays of the Lakity Member of the basal part of the Leetse Formation and corresponds to the upper part of the Hunneberg Regional Stage of Baltoscandia. The clay beds of the Lakity Member encompass the upper part of the Paroistodus proteus and lower part of the Prioniodus elegans conodont zones and correspond to the Tetragraptus phyllograptoides graptolite zone. Foraminifers from the Lakity Member were collected from strata belonging to both of the above mentioned conodont zones and are represented by monothalamous agglutinated foraminiferal tests of a new species of a new genus Lakites ordovicus n. gen., n. sp., new species of the genus Amphitremoida: A. asperella n. sp., A. laevis n. sp., A. longa n. sp., A. orbicularis n. sp., and A. rugosa n. sp. (family Hippocrepinellidae), a new genus and species Lavella cucumeriformis n. gen., n. sp. of the family Saccamminidae, and one specimen assigned to the genus Arenosiphon? of the family Hippocrepinidae. The finding of representatives of the genus Amphitremoida (emended herein), previously known only from the Middle Ordovician to the Lower Carboniferous (Tournaisian) permits the extension of the range of this genus down into the Lower Ordovician. You do not currently have access to this article.