Streptochilus Like Chiloguembelina but with an internal plate connecting successive chambers, a prominent extension of an apertural collar, and a smoother surface texture.
Citation: Benthic originstaxonomic rank: familyTaxonomic discussion: Molecular genetic data on the extant species Gallitelia vivans and Streptochilus globigerus has shown that they fall outside the clade of the other extant planktic foraminifera and so have separate origins from the benthic foraminifera (Darling et al. 2007, Ujiie et al. 2008). The same may apply to some fossil taxa currently placed in the Guembelitriodea. These two taxa are not directly related but it is convenient to group them here.
Distinguishing features: Parent taxon (pf_cenozoic): This is a polyphyletic grouping including all Cenozoic planktonic foraminifera This taxon: 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. They are being edited as the site is developed and comments on them are especially welcome.
Description
Biogeography and Palaeobiology
Geographic distribution
Biostratigraphic distribution
Geological Range: Last occurrence (top): Extant. Data source: Total of ranges of the species in this database First occurrence (base): within E10 zone (41.89-43.23Ma, base in Lutetian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: pf_cenozoic
References:
Benthic origins compiled by the pforams@mikrotax project teamviewed: 14-12-2024
