|Daughter taxa (time control age-window is: 0-800Ma)||Granddaughter taxa|
Initially biserial may become multiserial, smooth, microperforate wall; aperture simple (no lip or toothplate).
Like Chiloguembelina but with an internal plate connecting successive chambers, a prominent extension of an apertural collar, and a smoother surface texture.
These two taxa are not directly related but it is convenient to group them here.
Catalog entries: Bolivinidae [no catalog entry yet]
Distinguishing features: Biserial (separate evolutionary origin)NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): in upper part of Lutetian Stage (69% up, 43.2Ma, in Lutetian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Benthic origins compiled by the pforams@mikrotax project team viewed: 4-8-2021
Short stable page link: https://mikrotax.org/pforams/index.php?id=104009 Go to Archive.is to create a permanent copy of this page - citation notes