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- W2023780425 abstract "Research Article| April 01, 2012 NEW DATA ON THE MORPHOLOGY AND CLASSIFICATION OF THE OLIGOCENE–MIOCENE PLANKTONIC FORAMINIFER PARAGLOBOROTALIA SIAKENSIS (LEROY, 1939) Willem Jan Zachariasse; Willem Jan Zachariasse 3 1Stratigraphy and Paleontology group, Faculty of Geosciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands 3Correspondence author. E-mail: w.j.zachariasse@uu.nl Search for other works by this author on: GSW Google Scholar Sudijono Sudijono 2Geological Research and Development Centre (GRDC), Jalan Diponegoro 57, Bandung 40122 Indonesia (deceased) Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (2012) 42 (2): 156–168. https://doi.org/10.2113/gsjfr.42.2.156 Article history received: 23 Aug 2010 accepted: 23 Jan 2012 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 Willem Jan Zachariasse, Sudijono; NEW DATA ON THE MORPHOLOGY AND CLASSIFICATION OF THE OLIGOCENE–MIOCENE PLANKTONIC FORAMINIFER PARAGLOBOROTALIA SIAKENSIS (). Journal of Foraminiferal Research 2012;; 42 (2): 156–168. doi: https://doi.org/10.2113/gsjfr.42.2.156 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 SEM images of recently acquired specimens of Globigerina siakensisLeRoy, 1939, from near its type locality in Indonesia and other areas verify previous claims about the spinosity of the test wall and confirm assignment of the species to Paragloborotalia. Furthermore, they show that the species has straight intercameral sutures on the spiral side of the test.Paragloborotalia siakensis has previously been synonymized with Globorotalia mayeriCushman and Ellisor, 1939. Backscatter electron, high-vacuum SEM images of Gl. mayeri show that the holotype has curved spiral-side intercameral sutures and apparently lacks spinosity. The absence of the latter feature, however, cannot be confirmed because the holotype is poorly preserved, the single paratype belongs to a different species, and topotypes are unavailable.The straight spiral-side intercameral sutures in P. siakensis and the curved ones in the Gl. mayeri holotype argue against the synonymy of both species, certainly for those using a typological species approach. For those applying an assemblage-based concept, synonymy is demonstrated if specimens with curved and straight spiral-side intercameral sutures occur in single homogeneous assemblages, preferably from the type localities of both species, and are connected by intermediate morphologies. Unfortunately, neither the type sample of Gl. mayeri nor its washed residue is preserved, and there is no possibility of resampling the relevant interval. However, assemblages of P. siakensis from its type area, Java, and Trinidad are clearly devoid of specimens with Gl. mayeri-like suture patterns, providing sufficient reason to retain the name P. siakensis. If the wall of Gl. mayeri is not spinose, the species most likely is closely related to, or a senior synonym of, Globorotalia partimlabiataRuggieri and Sprovieri, 1970. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2023780425 title "NEW DATA ON THE MORPHOLOGY AND CLASSIFICATION OF THE OLIGOCENE-MIOCENE PLANKTONIC FORAMINIFER PARAGLOBOROTALIA SIAKENSIS (LEROY, 1939)" @default.
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