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Globotruncana linneiana


Classification: pf_mesozoic -> Globotruncanidae -> Globotruncana -> Globotruncana linneiana
Sister taxa: G. aegyptiaca, G. arca, G. bulloides, G. dupeublei, G. esnehensis, G. falsostuarti, G. hilli, G. lapparenti, G. linneiana, G. mariei, G. neotricarinata, G. orientalis, G. rosetta, G. rugosa, G. ventricosa, G. sp.,

Taxonomy

Citation: Globotruncana linneiana (d'Orbigny 1839)
Rank: Species
Basionym: Rosalina linneiana
Synonyms:
Taxonomic discussion: Globotruncana linneiana (dOrbigny) was probably the first species of Globotruncana to be described. d'Orbigny's figured specimen (1839, pl. 5, figs. 10-12) was called "Rosalina Linnei" in the plate explanation, although in the text it is "Rosalina Linneiana". However, d'Orbigny's usual, and apparently favorite, ending for patronymic names was -iana; and there is no reason to believe he intended to give the name of this species a different ending. Although many later workers have called the specific name of this form linnei and even linnaei, linnaeana, and linneana, the correct name is linneiana." [copied from Chronos database]

Pessagno, 1967: "Marginotruncana pseudolinneiana Pessagno is nearly homeomorphic externally for G. linneiana. It can be differentiated from G. linneiana by the following criteria: (1) its primary aperture is clearly extraumbilical-umbilical in position; (2) the spiral surface of its test is more planiform and is often concave; (3) its chambers are almost entirely crescent-shaped spirally whereas those of Gl. linneiana are more typically petaliform; and (4) it lacks the coarsely beaded sutures and keels of G. linneiana."

Type images:

Original description:

Rosalina. Testa orbiculato-depressa, rugosa, alba, margine bicarinata, umbilicata, umbilico magno; spira subplana, anfractibus tribus distinctis; loculis sex lateraliter compressis, supra subtusque limbatis.
Coquille suborbiculaire, très déprimée, bicarénée sur son pourtour, un peu concave en dessous, fortement ombiliquée, mais sans disque ombilical; la surface en est très rugueuse. Spire à peine saillante, bien marquée par les bordures des loges; composée de trois tours, dont le premier est en partie masqué par des rugosités. Loges comprimées au nombre de six partour, oblongues, aplaties en dessous; obliques, bordées tout autour d'un bourrelet; endessous elles sont plus particulièrement bordées du côté extérieur et ombilical, mais les bourrelets sont moins marqués qu'en dessus. Ouverture sur le bord des loges dans l'ombilic. Couleur blanchâtre uniforme.

Translated from French: "Rosaline. Test as a flat circle, rugose, white, double-keeled profile, with umbilicus, wide; trochospire nearly flat, distinct septa; six laterally compressed chambers, rimmed on spiral and umbilical sides. Size: diameter is 1/4 mm large. Shell is sub-circular, much depressed; periphery is double-keeled, umbilical side is slightly concave, umbilicus is well marked, but without umbilical plate; surface is rugose. Spiral side is slightly raised, well delimited by chamber edges; the test has three whorls, the first one being hidden by rugosities. On the last whorl there are six compressed chambers, oblong, flattened on umbilical side; they are oblique and surrounded by a ridge; on umbilical side, chambers have a rim well marked on external part, but less marked than on spiral side. An aperture opens in umbilical area from internal part of each chamber. Colour is uniformly white. 

This species is distinct from all others by its double-keel profile, by the flattened surface of chambers both spirally and umbilically, by its strong ridges and wide umbilicus; these features are so clear that this species cannot be mistaken with any.

Entries in the Catalog of original descriptions: Rosalina linneiana, Globotruncana lapparenti depressa, Globotruncana erevanica, Globotruncana lapparenti longilocula, Globotruncana majzoni, Globotruncana sudrensis parallela, Globotruncana quadrata, Globotruncana riojai, Pulvinulina tricarinata, Globotruncana linneiana obliqua, Globigerina (Globotruncana) marginata linnaeana

Geological Range:
Last occurrence (top): within R. fructicosa zone (69.18-70.14Ma, top in Maastrichtian stage). Data source: Huber et al., 2008
First occurrence (base): at base of Santonian Stage (0% up, 86.3Ma, in Santonian stage). Data source: Petrizzo et al., 2017

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Globotruncana linneiana, synonyms included - Globigerina marginata linnaeana; Globotruncana colombiana; Globotruncana depressa; Globotruncana desioi; Globotruncana erevanica; Globotruncana lapparenti depressa; Globotruncana lapparenti longilocula; Globotruncana linnaeana; Globotruncana linneiana; Globotruncana linneiana obliqua; Globotruncana linneiana obliquus; Globotruncana loeblichi; Globotruncana longilocula; Globotruncana majzoni; Globotruncana obliqua; Globotruncana parallela; Globotruncana riojai; Globotruncana sudrensis parallela; Globotruncana tricarinata; Globotruncana tricarinata colombiana; Globotruncana tricarinata desioi; Pulvinulina tricarinata;
  • space-time plot :: Samples map :: Parent: Globotruncana

    Character matrix

    test outline:Circularchamber arrangement:Trochospiraledge view:Planoconvexaperture:Umbilical-extraumbilical
    sp chamber shape:Crescenticcoiling axis:Very lowperiphery:Double keelaperture border:Tegilla
    umb chbr shape:umbilicus:Narrowperiph margin shape:Subangularaccessory apertures:Intralaminal
    spiral sutures:Raisedumb depth:Shallowwall texture:Finely pustuloseshell porosity:
    umbilical or test sutures:final-whorl chambers:5.5-6.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Almogi-Labin, A., Reiss, Z & Caron, M. (1986). Senonian globotruncanidae from Israel. Eclogae Geologicae Helvetiae. 79(3): 849-895. gs

    Brönnimann, P. & Brown, N. K. (1956). Taxonomy of the Globotruncanidae. Eclogae Geologicae Helvetiae. 48: 503-562. gs

    Robaszynski, F., Caron, M., Gonzales Donoso, J. M., Wonders, A. A. H. & the European Working Group on Planktonic Foraminifera (1984). Atlas of Late Cretaceous globotruncanids. Revue de Micropaléontologie. 26(03-Apr): 145-305. gs


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    Globotruncana linneiana compiled by the pforams@mikrotax project team viewed: 6-12-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110163 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (1)

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    François

    Globigerina (Globotruncana) marginata linnaeana (alternative combination) is a new subsp. described by Olertz (1942, p. 135). Note the subspecific epithet "linnaeana" differs from "linneiana". Are both taxa synonyms?

    ref: Olbertz, G. (1942). Untersuchungen zur Mikrostratigraphie der Oberen Kreide Westfalens (Turon — Emscher — Untersenon). Paläontologische Zeitschrift. 23(1-2): 74-156.

    François

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    Jeremy Young (Tonbridge, UK)

    I have not come across this one before and I don't have the reprint to hand, but judging from the Ellis & Messina catalog entry it looks to me like Olbertz was recording d'Orbigny's species but for some reason gave the impression he was describing new species.

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    François

    Olbertz designated a holotype and his description indicates he refers to the representation of d'Orbigny's species by Brady (1884). He choose the name to indicate the similarity with d'Orbigny's species (maybe not the best choice).

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    Jeremy Young (Tonbridge, UK)

    Thanks - I have now added the sub-species to the catalog. As you say it clearly was intended as a new sub-species. Since it is judged to be a synonym of linneiana the homonymy is not an issue which we need to address.

    Jeremy

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