Specimens which cannot be assigned to established species
| Daughter taxa (time control age-window is: 0-800Ma) | ||||
| | | Blefuscuiana alobata | |
| | | Blefuscuiana cumulus | |
| | | Blefuscuiana daminiae | |
| | | Blefuscuiana depressa | |
| | | Blefuscuiana implana | |
| | | Blefuscuiana laculata | |
| Blefuscuiana sp. Specimens which cannot be assigned to established species | ||||
Taxonomy
Original description: Test a low trochospiral of two or more whorls, typically with six or seven chambers in the final whorl, but there may be as few as five or as many as eight. The chambers are subglobular or depressed, reniform or ovoid; they are not radially elongate; spiral side evolute, umbilical side partly involute; aperture intra-extraumbilical, reaching to or even slightly over the periphery of the earlier whorl; the aperture possesses a porticus, of uniform breadth throughout or broadest posteriorly; relict apertures and portici are usually visible in the umbilical parts of the chambers of about half of the last whorl. The wall is microperforate and its surface is smooth, lacking muricae.
Entries in the Catalog of original descriptions: Blefuscuiana
Geological Range:
Last occurrence (top): at top of Aptian Stage (100% up, 113Ma, in Aptian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Barremian Stage (0% up, 130.8Ma, in Hauterivian stage). Data source: Total of range of species in this database
Plot of range and occurrence data:
References:
 |
Blefuscuiana compiled by the pforams@mikrotax project team viewed: 20-3-2023
Short stable page link: https://mikrotax.org/pforams/index.php?id=110024 Go to Archive.is to create a permanent copy of this page - citation notes |
Comments
(0)