pforams@mikrotax - Hedbergella praelippa pforams@mikrotax - Hedbergella praelippa

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. ventriosa> >>


Citation: Hedbergella praelippa Huber & Leckie 2011
taxonomic 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

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:4-4.5 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within Aptian Stage (113.20-121.40Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within Aptian Stage (113.20-121.40Ma, base in Aptian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


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


Hedbergella praelippa compiled by the pforams@mikrotax project team viewed: 14-6-2024

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