Taxonomy of some Recent Nodosariinae (Foraminifera) from the North Atlantic, with notes on wall lamination

Abstract

Research Article| January 01, 2004 Taxonomy of some Recent Nodosariinae (Foraminifera) from the North Atlantic, with notes on wall lamination Marie Eiland; Marie Eiland 1Zoological Museum of Copenhagen, Universitetsparken 15, DK-2100 Copenhagen, Denmark email: marie_eiland@yahoo.dk Search for other works by this author on: GSW Google Scholar Gudmundur Gudmundsson Gudmundur Gudmundsson 2Icelandic Institute of Natural History, Hlemmur 3, P.O. Box 5320, IS-125 Reykjavik, Iceland email: gg@ni.is Search for other works by this author on: GSW Google Scholar Micropaleontology (2004) 50 (2): 195–210. https://doi.org/10.2113/50.2.195 Article history received: 07 May 2003 accepted: 07 Dec 2003 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 Marie Eiland, Gudmundur Gudmundsson; Taxonomy of some Recent Nodosariinae (Foraminifera) from the North Atlantic, with notes on wall lamination. Micropaleontology 2004;; 50 (2): 195–210. doi: https://doi.org/10.2113/50.2.195 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyMicropaleontology Search Advanced Search Abstract Morphological characters of twelve Recent species of Nodosariinae (Foraminifera) are revised, using a large number of specimens collected in the North Atlantic. The species are assigned to four genera: Dentalina Risso 1826, LaevidentalinaLoeblich and Tappan 1986, Nodosaria Lamarck 1812, and Pseudonodosaria Boomgaart 1949. One new species, Nodosaria haliensis is described. Previously unknown variation in the lamination pattern of the Nodosariinae test wall is described and some new terms are proposed to describe that variation. We continue to use the term monolamellar for septa made of a single layer, but use the term polylamellar, for septa made of two or more layers. The term plesio-polylamellar is proposed for forms with septa made of several layers, and which form secondary lamellae that envelope only some of the previous chambers. The term poly-monolamellar is replaced with a new term, ortho-polylamellar. We also discovered that only some, but not all of the primary layers in polylamellar septa continued to form secondary lamellae; this is referred to as a partial origin of secondary laminations. This is different from the well-known pattern in which all of the primary layers of a plesio-polylamellar septum continue and form what we refer to as a complete origin of secondary lamellae. We discovered that the lamellar structure of L. frobisherensis is somewhat variable even within the same specimen. The initial chambers are always ortho-monolamellar, but in later chambers the structure becomes plesio-monolamellar or even plesio-polylamellar, and the secondary lamellae can be either a partial or complete continuation of the primary lamellae of the septa. Species of Nodosaria are found to be atelo-lamellar, Laevidentalina are ortho-lamellar or plesio-lamellar and Dentalina and Pseudonodosaria are ortho-lamellar. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.