Daughter taxa: (blue => in age window 0-800Ma) | Granddaughter taxa | |||
![]() | Gallitellia Initially biserial may become multiserial, smooth, microperforate wall; aperture simple (no lip or toothplate). | |||
Streptochilus Like Chiloguembelina but with an internal plate connecting successive chambers, a prominent extension of an apertural collar, and a smoother surface texture. | S. globulosum S. globigerum S. latum S. subglobigerum S. inglei S. macdougallae S. cetacense S. mascarenense S. pristinum S. rockallkiddense S. tasmanense S. martini S. sp. |
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.
Geographic distribution:
Geological Range:
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:
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Benthic origins compiled by the pforams@mikrotax project team viewed: 16-1-2021
Short stable page link: http://mikrotax.org/pforams/index.php?id=104009 Go to Archive.is to create a permanent copy of this page - citation notes |