Taxonomy
Original description: Translation from Spanish: Detached test, slightly club-shaped and trochospiral, the peripheral margin is lobate; five chambers are visible on the dorsal side, the first chambers are globular, the last ones are elongated, sutures are curved; the wall texture is calcareous, slightly perforated and pustulose, the aperture is extraumblical umbilical equatorial and arch-shaped.
Entries in the Catalog of original descriptions: Globigerina roblesae
Emended description:
Character matrix
test outline: | Stellate | chamber arrangement: | Trochospiral | edge view: | Equally biconvex | aperture: | |
sp chamber shape: | Elongate | coiling axis: | Very low | periphery: | N/A | aperture border: | Thin lip |
umb chbr shape: | Elongate | umbilicus: | Wide | periph margin shape: | Narrowly rounded | accessory apertures: | N/A |
spiral sutures: | Strongly depressed | umb depth: | Shallow | wall texture: | Smooth | shell porosity: | Finely Perforate: 1-2.5µm |
umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 5-6 | N.B. These characters are used for advanced search. N/A - not applicable |
Geological Range:
Last occurrence (top): within G. algerianus zone (116.86-118.24Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. similis zone (124.40-126.01Ma, base in Barremian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Obregon de la Parra, J. (1959). Consideraciones sobre el daniano en la Cuenca sedimentaria de Tampico-Misantla. Boletin de la Asociación Mexicana de Geologos Petroleros. 11(1-2): 13-20. gsReferences:
Hedbergella roblesae compiled by the pforams@mikrotax project team viewed: 8-12-2024
Short stable page link: https://mikrotax.org/pforams/index.php?id=110260 Go to Archive.is to create a permanent copy of this page - citation notes |
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