A new, ribbed species of Nemkovalla Less 1987 (Discocyclinidae), and discussion of the genus Actinocyclina Guembel, 1870

Other| July 01, 1997 A new, ribbed species of Nemkovalla Less 1987 (Discocyclinidae), and discussion of the genus Actinocyclina Guembel, 1870 Carles Ferrandez Canadell Carles Ferrandez Canadell Universitat de Barcelona, Departament de Geologia Dinamica, Geifisica i Paleontologia, Barcelona, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information Carles Ferrandez Canadell Universitat de Barcelona, Departament de Geologia Dinamica, Geifisica i Paleontologia, Barcelona, Spain 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. Journal of Foraminiferal Research (1997) 27 (3): 175–185. https://doi.org/10.2113/gsjfr.27.3.175 Article history First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Carles Ferrandez Canadell; A new, ribbed species of Nemkovalla Less 1987 (Discocyclinidae), and discussion of the genus Actinocyclina Guembel, 1870. Journal of Foraminiferal Research 1997;; 27 (3): 175–185. doi: https://doi.org/10.2113/gsjfr.27.3.175 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 A new species of the genus Nemkovella (Nemkovella rota n. sp.) is described from the early Cuisian (early Eocene) of southern France. The presence of a discocyclinid-type microspheric juvenarium and the absence of annular stolons permit this generic assignation. The most distinctive characteristic of this new species is the presence of numerous small ribs. Orthophragminid (Discocyclinidae and Orbitoclypeidae) species with numerous small ribs have been traditionally assigned to the genus Actinocyclina Gumbel 1870. However, different species of both Discocyclina and Nemkovella, as well as other orthophragminid genera such as Pseudophragmina and Orbitoclypeus, also have ribs as a specific character. Because Actinocyclina is characterized exclusively by the presence of ribs, and this is a specific character common to several genera, then Actinocyclina must be considered invalid. Moreover, because the generotype of Actinocyclina has a discocyclinid-type microspheric juvenarium and annular stolons, it is herein reassinged to the genus Discocyclina as a ribbed species, D. radians (d'Archiac). 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.