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Hedbergella praelippa


Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella -> Hedbergella praelippa
Sister taxa: << < H. compacta, H. excelsa, H. gorbachikae, H. handousi, H. hexacamerata, H. hispaniae, H. infracretacea, H. kuhryi, H. kuznetsovae, H. labocaensis, H. luterbacheri, H. maslakovae, H. mitra, H. modesta, H. occulta, H. praelippa, H. praetrocoidea, H. primare, H. quadricamerata, H. roblesae, H. ruka, H. semielongata, H. sigali, H. similis, H. speetonensis, H. tardita, H. tatianae, H. trocoidea, H. tunisiensis, H. tuschepsensis, H. sp.,

Taxonomy

Citation: Hedbergella praelippa Huber & Leckie 2011
Rank: Species
Basionym: Hedbergella praelippa

Type images:

Original description: Test wall microperforate with randomly distributed pores, pore diameter ranging 0.6 to 0.8 microns, surface smooth or with weakly developed perforation cones. Test very small, coiled in a low to rarely moderate trochospire, equatorial periphery moderately lobate, equally biconvex, test thickness:diameter ratio averaging 0.55; chambers subgobular to globular, dextrally, or sinistrally coiled in a low trochospire consisting of 2 whorls of 8 to 9 chambers that increase rapidly in size, ultimate:penultimate ratio averaging 1.14, antepentultimate:ultimate ratio averaging 1.3, with 4.0 to 4.5 chambers in the final whorl, final chamber face extends in the direction of coiling; sutures moderately depressed, radial, straight; umbilicus shallow, narrow, umbilical: test diameter ratio averaging 1.4; aperture an extra-umbilical low arch that extends from near the peripheral margin into the umbilicus, without a bordering lip.

Entries in the Catalog of original descriptions: Hedbergella praelippa

Geological Range:
Last occurrence (top): within Aptian Stage (112.95-126.30Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within Aptian Stage (112.95-126.30Ma, base in Aptian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Hedbergella

    Character matrix

    test outline:Lobatechamber arrangement:Trochospiraledge view:aperture:Extraumbilical
    sp chamber shape:coiling axis:Low-moderateperiphery:aperture border:
    umb chbr shape:umbilicus:periph margin shape:accessory apertures:
    spiral sutures:umb depth:wall texture:Perforation conesshell porosity:Microperforate: <1┬Ám
    umbilical or test sutures:Moderately depressedfinal-whorl chambers:4.0-4.5 N.B. These characters are used for advanced search. N/A - not applicable

    References:

    Huber, B. T. & Leckie, R. M. (2011). Planktic foraminiferal species turnover across deep-sea Aptian/Albian boundary sections. Journal of Foraminiferal Research. 41: 53-95. gs


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    Hedbergella praelippa compiled by the pforams@mikrotax project team viewed: 8-12-2019

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    Short stable page link: http://mikrotax.org/pforams/index.php?id=110256 Go to Archive.is to create a permanent copy of this page - citation notes



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