Candeina antarctica, n.sp., and the phylogenetic history and distribution of Candeina spp. in the Paleogene-early Neogene of the Southern Ocean

Abstract

Other| April 01, 1985 Candeina antarctica, n.sp., and the phylogenetic history and distribution of Candeina spp. in the Paleogene-early Neogene of the Southern Ocean R. Mark Leckie; R. Mark Leckie Univ. Colo., Dep. Geol. Sci., Boulder, CO, United States Search for other works by this author on: GSW Google Scholar Peter-Noel Webb Peter-Noel Webb Ohio State Univ., Dep. Geol. and Mineral., United States Search for other works by this author on: GSW Google Scholar Author and Article Information R. Mark Leckie Univ. Colo., Dep. Geol. Sci., Boulder, CO, United States Peter-Noel Webb Ohio State Univ., Dep. Geol. and Mineral., United States Publisher: Cushman Foundation for Foraminiferal Research First Online: 03 Mar 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 GeoRef, Copyright 2004, American Geological Institute. Reference includes data supplied by Institute of Geological and Nuclear Sciences (SIRIS), Lower Hutt, New Zealand Journal of Foraminiferal Research (1985) 15 (2): 65–78. https://doi.org/10.2113/gsjfr.15.2.65 Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation R. Mark Leckie, Peter-Noel Webb; Candeina antarctica, n.sp., and the phylogenetic history and distribution of Candeina spp. in the Paleogene-early Neogene of the Southern Ocean. Journal of Foraminiferal Research 1985;; 15 (2): 65–78. doi: https://doi.org/10.2113/gsjfr.15.2.65 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 SocietyJournal of Foraminiferal Research Search Advanced Search Abstract Two poorly known species of Candeina from the Southern Hemisphere, C. cecionii Canon and Ernst and C. zeocenica Hornibrook and Jenkins, are believed to be part of a lineage that evolved in the temperate Southern Ocean during the Paleogene. Candeina cecionii is known from the early Eocene or early middle Eocene of the Magallanes Basin (southern Chile) while C. zeocenica has only been found in late middle Eocene to early Oligocene age sediments of New Zealand. Paleoceanographic circulation patterns and widespread hiatuses may be responsible for their present geographic and stratigraphic distribution. This suspected lineage probably gave rise to Candeina antarctica, n. sp., described here from the late Oligocene to middle Miocene of the Ross Sea, Antarctica. Candeina antarctica was part of a nearly monospecific planktonic foraminiferal assemblage during this period of deteriorating climatic conditions on and around Antarctica and was probably restricted to this region. As glacial conditions intensified during the middle and late Miocene, calcareous plankton were displaced northwards and replaced by siliceous planktonic assemblages. This transition corresponds with the last known occurrence of C. antarctica. Other workers have suggested that Candeina nitida s.l. evolved from Globigerina juvenilis (= Globigerinita glutinata) near the base of the late Miocene. An alternative explanation for the origin of C. nitida (late Miocene to Recent) is suggested in light of the Paleogene-early Neogene Candeina morphoseries proposed here. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.