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Morphometric and stratophenetic basis for phylogeny and taxonomy in Late Cretaceous gublerinid planktonic foraminifera

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dc.contributor.author Georgescu, Marius D. en
dc.contributor.author Saupe, Erin E. en
dc.contributor.author Huber, Brian T. en
dc.date.accessioned 2009-05-13T13:20:00Z
dc.date.available 2009-05-13T13:20:00Z
dc.date.issued 2008
dc.identifier.citation Georgescu, Marius D., Saupe, Erin E., and Huber, Brian T. 2008. "<a href="https%3A%2F%2Frepository.si.edu%2Fhandle%2F10088%2F7421">Morphometric and stratophenetic basis for phylogeny and taxonomy in Late Cretaceous gublerinid planktonic foraminifera</a>." <em>Micropaleontology</em>. 54 (5):397&ndash;424. en
dc.identifier.issn 0026-2803
dc.identifier.uri http://hdl.handle.net/10088/7421
dc.description.abstract Taxonomic revision of the gublerinid serial planktonic foraminifera of the I-ale Cretaceous (late Campanian-Maastrichtian that the group consists of two genera. Gublerina Kikoine 1948 and Praegublerina gen. nov., which evolved from the finely costate, biserial species Heterohelix planata (Cushman 1938). Three species are included within Praegublerina:P.pseudotessera (Cushman 1938), P. acuta (de Klasz 1953) and P. robusta (de Klasz 1953), the first being the oldest of the genus and a descendant of Heterohelix planata (Cushman 1938). Gublerina cuvillieri Kikoine 1948 and G. rajagopalani Govindan 1972 are retained within Gublerina. The two lineages are recognized based on gross test architecture, test ornamentation, pore size and internal test morphology. Our study reveals the existence of an evolutionary continuum between lineages in which the gublerinid-type chamber proliferation is independently developed in Gublerina and Praegublerina. The new taxonomic framework reflects the iterative pattern of planktonic foraminiferal evolution and it results in a better understanding of the stratigraphic and geographic distribution of the gublerinid taxa. Stable isotopic comparison of G. rajagopalani and G. cuvillieri with co-occurring late Maastrichtian benthic and plankotonic species indicates that the two Gublerina species shared the same depth habitat near the thermocline. en
dc.format.extent 1414897 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US
dc.relation.ispartof Micropaleontology en
dc.title Morphometric and stratophenetic basis for phylogeny and taxonomy in Late Cretaceous gublerinid planktonic foraminifera en
dc.type Journal Article en
dc.identifier.srbnumber 77443
rft.jtitle Micropaleontology
rft.volume 54
rft.issue 5
rft.spage 397
rft.epage 424
dc.description.SIUnit NMNH en
dc.description.SIUnit NH-Paleobiology en
dc.citation.spage 397
dc.citation.epage 424


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