CATALOG OF ORIGINAL DESCRIPTIONS: Praeglobotruncana algeriana Caron 1966

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> P -> Praeglobotruncana -> Praeglobotruncana algeriana
Other pages this level: P. algeriana, P. barbui, P. biconvexa gigantea, P. bronnimanni, P. clotensis, P. coarctata, P. compressa, P. crassa, P. gigantea, P. hagni, P. hansbollii, P. hessi compressiformis, P. hessi hessi, P. hilalensis, P. inermis, P. klausi, P. lehmanni, P. loeblichae, P. mattsoni, P. modesta, P. oraviensis, P. oraviensis trigona, P. pauliani, P. prahovae, P. primitiva, P. pseudoalgeriana, P. rohri, P. shirakinensis, P. stephani gibba

Praeglobotruncana algeriana

Citation: Praeglobotruncana algeriana Caron 1966
Rank: Species
Type locality: From Sidi Aissa, south of Aumale, Algeria. Similar forms found in the Gruyere synclinal, Prealpes medianes, Switzerland.
Type specimens: see in REICHEL's collection
Type repository: Basel, CH; Institut de Geologie, Universite de Basle, Swisse

Current identification/main database link: Praeglobotruncana algeriana (Caron, 1966) Falzoni et al., 2016


Original Description
Translated from French: Diagnosis: We quote here the very thorough diagnosis given by M. Reichel (1949) for the original description of Globotruncana aff. renzi (renamed P. algeriana by Caron, ) "The spire comprises a total number of 16 chambers occupying a little more than two and a half whorls, 6 of them occupying the last whorl. Keels or pustulose ridges border the septa of the spiral side, from the first chambers to the 11th or 12th chamber, the peripheral keel is double. The first of the 6 chambers of the last whorl is still bordered by two keels consisting of small pustules. In the two specimens studied the second chamber of the last whorl is undeveloped (too small for the rank it occupies) and has only one thick keel reminiscent of that of G. stephani Gandolfi; the following four chambers are single keeled, but in the vicinity of the septal suture the carinal ridge splits into two diverging branches, the upper branch forming the septal ridge of the spiral side, the lower branch blurs within the sutural groove of the umbilical side. The last chamber has only a blunt keel, barely noticeable. One sees that in a similar form the axial sections will generally show the typical profile of G. renzi (with a last single-keeled chamber) However, if by chance, the section crosses the point where the keel splits in one of the last chambers, the section will lead us to believe that we are dealing with a fully bicarinate form. The main aperture is not quite visible, however it does not extend much beyond the umbilicus. Fairly developed peristomal tongue-like flaps converge in the umbilical depression, leaving between them small, deep indentations. No accessory apertures."

References:

Caron, M. (1966). Globotruncanidae du Cretace superieur du synclinal de la Gruyere (Prealpes medianes, Suisse). Revue de Micropaléontologie. 9(2): 68-93. gs

Falzoni, F., Petrizzo, M. R., Jenkyns, H. C., Gale, A. S. & Tsikos, H. (2016). Planktonic foraminiferal biostratigraphy and assemblage composition across the Cenomanian–Turonian boundary interval at Clot Chevalier (Vocontian Basin, SE France). Cretaceous Research. 59: 69-97. gs


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Praeglobotruncana algeriana compiled by the pforams@mikrotax project team viewed: 27-11-2020

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