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Ventilabrella


Classification: pf_mesozoic -> Heterohelicidae -> Ventilabrella
Sister taxa: Braunella, Gublerina, Hendersonites, Heterohelix, Huberella, Laeviheterohelix, Lunatriella, Planoglobulina, Planoheterohelix, Praegublerina, Protoheterohelix, Pseudoguembelina, Pseudotextularia, Racemiguembelina, Rectoguembelina, Sigalia, Spiroplecta, Ventilabrella, Zeauvigerina,
Daughter taxa (blue => in age window 0-300Ma)


Taxonomy

Citation: Ventilabrella Cushman 1928
Rank: Genus
Type species: Ventilabrella eggeri Cushman, 1928
Taxonomic discussion: A neotype for Ventilabrella eggeri Cushman (USNM No. 170308) from the Taylor Marl of Texas was designated by S. E. Martin (1972, *2051, p. 86).

Type images:

Original description: Ventilabrella:

Entries in the Catalog of original descriptions: Ventilabrella;

Short diagnosis: Test subtriangular to flabelliform in outline, laterally compressed, chambers globular to pyriform, those of early stage biserially arranged, later with chamber proliferation in the plane of biseriality, sutures distinct, depressed; wall calcareous, hyaline, perforate, surface with longitudinal discontinuous and somewhat irregular low costae; arched basal apertures on both margins of many chambers in the multiseriate stage, cameral flanges present, and these and the cameral ridges may be merged on the final series of chambers.

Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): within Turonian Stage (89.77-93.90Ma, base in Turonian stage). Data source: Total of range of species in this database

Plot of occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

References:

Loeblich, A.R., Jr. & Tappan, H. (Editors), (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York, 1059 pp.


Ventilabrella compiled by the pforams@mikrotax project team viewed: 26-6-2017

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