pforams@mikrotax - Heterohelicidae

pforams@mikrotax - Heterohelicidae pforams@mikrotax - Heterohelicidae

Heterohelicidae

Classification: pf_mesozoic -> Heterohelicidae
Sister taxa: Guembelitriidae ⟩⟨ Heterohelicidae ⟩⟨ Planomalinidae, Globigerinelloididae, Schackoinidae ⟩⟨ Conoglobigerinidae, Chilostomellidae, Favusellidae, Praehedbergellidae, Hedbergellidae, Rugoglobigerinidae, Rotaliporidae, Globotruncanidae, hidden

Daughter taxa (time control age-window is: 0-800Ma)		Granddaughter taxa
	planispiral -> biserial
	Heterohelix Initially planispiral, final 1 or 2 pairs of chambers subtriangular with a short blunt spine.	Heterohelix americana Heterohelix sp.
	Spiroplecta Initially planispiral then biserial, chambers globular, aperture symmetrical, wall texture costate	Spiroplecta americana Spiroplecta sp.
	biserial throughout
	Braunella Biserial throughout, chambers globular, wall texture with irregular reticulate ornamentation	Braunella brauni Braunella punctulata Braunella sp.
	Hendersonites Biserial throughout, test compressed with a carinate peripheral margin	Hendersonites carinatus Hendersonites sp.
	Huberella Biserial throughout, chambers with projections along the medial suture, like Pseudoguembelina, but without supplementary apertures, wall texture finely costate.	Huberella huberi Huberella praehuberi Huberella sp.
	Laeviheterohelix Biserial throughout, aperture symmetrically positioned, wall smooth, microperforate with irregularly scattered pustule or pore mounds	Laeviheterohelix dentata Laeviheterohelix flabelliformis Laeviheterohelix glabrans Laeviheterohelix pulchra Laeviheterohelix reniformis Laeviheterohelix turgida Laeviheterohelix sp.
	Planoheterohelix Biserial throughout, aperture symmetrically positioned, wall texture costate.	Planoheterohelix globulosa Planoheterohelix moremani Planoheterohelix olssoni Planoheterohelix papula Planoheterohelix paraglobulosa Planoheterohelix planata Planoheterohelix postmoremani Planoheterohelix praenuttalli Planoheterohelix reussi Planoheterohelix rumseyensis Planoheterohelix labellosa Planoheterohelix sphenoides Planoheterohelix stenopos Planoheterohelix vistulaensis Planoheterohelix sp.
	Protoheterohelix Biserial throughout, aperture asymmetrically positioned, wall texture smooth.	Protoheterohelix obscura Protoheterohelix washitensis Protoheterohelix sp.
	Pseudoguembelina Biserial throughout, secondary sutural apertures along the median suture, partially covered by flaplike projections. Test usuually costate.	Pseudoguembelina costellifera Pseudoguembelina costulata Pseudoguembelina excolata Pseudoguembelina hariaensis Pseudoguembelina kempensis Pseudoguembelina palpebra Pseudoguembelina praehariaensis Pseudoguembelina semicostata Pseudoguembelina sp.
	Pseudotextularia Adult biserial chambers expanded such that test breadth is greater than width in side view.	Pseudotextularia elegans Pseudotextularia intermedia Pseudotextularia nuttalli Pseudotextularia sp.
	biserial -> multiserial
	Planoglobulina Test flabelliform, biserial stage followed by a proliferation of chambers in the same plane. Medium to coarse costae.	Planoglobulina acervulinoides Planoglobulina brazoensis Planoglobulina browni Planoglobulina carseyae Planoglobulina manuelensis Planoglobulina multicamerata Planoglobulina riograndensis Planoglobulina sp.
	Ventilabrella Similar to Planoglobulina but separate origin. Costae low and irregular.	Ventilabrella austinana Ventilabrella eggeri Ventilabrella ornatissima Ventilabrella sp.
	Gublerina Test flabelliform, the 2 rows of chambers diverge leaving nonseptate central space that later is partially occupied by chamber proliferation.	Gublerina cuvillieri Gublerina rajagopalani Gublerina sp.
	Praegublerina Similar to Gublerina but: 1. chamber sets increasing by one chamber at a time rather than three; 2. finer costae; 3. transverse biaperturate walls in multiserial part.	Praegublerina acuta Praegublerina pseudotessera Praegublerina robusta Praegublerina sp.
	Sigalia Biserial or with chamber proliferation. Sutures rasied and beaded.	Sigalia carpatica Sigalia decoratissima Sigalia deflaensis Sigalia rugocostata Sigalia sp.
	Racemiguembelina Test initially biserial, becomes conical with proliferation of multiple globular chambers forming a crown at top of test	Racemiguembelina fructicosa Racemiguembelina powelli Racemiguembelina sp.
	biserial -> uniserial
	Lunatriella Initially biserial, later chambers elongated and arranged in an irregular uniserial pattern	Lunatriella spinifera Lunatriella sp.
	Rectoguembelina Initially biserial, later part of test uniserial, globular chambers throughout.	Rectoguembelina cretacea Rectoguembelina sp.
	Zeauvigerina Test biserial until final chamber, which becomes or shows a tendency to become uniserial	Zeauvigerina waiparaensis Zeauvigerina sp.

Taxonomy

Citation: Heterohelicidae Cushman 1927

taxonomic rank: Family

Original description: Test in the more primitive forms planospiral in the young,later becoming biserial, in the more specialized genera the spiral stage and even the biserial stage may be wanting and the rela-tionships shown by other characters; well calcareous, perforate, ornamentation in higher genera bilaterally symmetrical; aperture when simple, usually large for the size of the test, withoutteeth, in.some forms with apertural neck and phialine lip.

Entries in the Catalog of original descriptions: Heterohelicidae

Distinguishing features:
Parent taxon (pf_mesozoic):
This taxon: Aperture symmetrical, ranging from a low slit to a high arch at the base of the final chamber, becoming terminal in uniserial taxa.

Geological Range:
Last occurrence (top): at top of Danian Stage (100% up, 61.6Ma, in Selandian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within P. ticinensis zone (101.92-103.94Ma, base in Albian stage). Data source: Total of ranges of species in this database

Plot of range and 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_mesozoic

References:

Cushman, J. A. (1927a). An outline of a re-classification of the Foraminifera. Contributions from the Cushman Laboratory for Foraminiferal Research. 3: 1-105. gs O

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs

Heterohelicidae compiled by the pforams@mikrotax project team viewed: 14-12-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110282 Go to Archive.is to create a permanent copy of this page - citation notes

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