pforams@mikrotax - Hedbergella hispaniae pforams@mikrotax - Hedbergella hispaniae

Hedbergella hispaniae


Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella -> Hedbergella hispaniae
Sister taxa: H. aptiana, H. bizonae, H. bollii, 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> >>

Taxonomy

Citation: Hedbergella hispaniae Longoria 1974
taxonomic rank: Species
Basionym: Hedbergella hispaniae

Type images:

Original description: Test medium-sized, plano-convex, spiral side flattened, umbilical side convex; periphery circular, lobulate; 6-7 chambers in the last whorl, increasing gradually in size as added; last chamber protruding towards the umbilicus; chambers globular on both spiral and umbilical sides, ovoid in peripheral view; sutures radial, straight, strongly depressed on both spiral and umbilical sides.

Entries in the Catalog of original descriptions: Hedbergella hispaniae


Emended description:

Test medium sized, coiled on a low trochospire; 2 to 2.5 whorls; 6 to 7 chambers in the outer whorl increasing gradually and slowly in size as added; chambers globular to subglobular, inflated, the last two or three tending to become subtriangualr on the umbilical side, subtrapezoidal on the spiral side, slightly reniform in lateral view; the last one protruding toward the umbilical area; equatorial periphery subcircular to ovoid, slightly lobate; sutures depressed, radial to slightly curved; umbilical area small and rather deep; aperture as a low to medium arch bordered by a lip. Wall smooth, finely perforate, that may be covered by perforation cones in the early chambers of the last whorl. [copied from Chronos database]

Character matrix
test outline:Subcircularchamber arrangement:Trochospiraledge view:Planoconvexaperture:Extraumbilical
sp chamber shape:Inflatedcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Subtriangularumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:N/A
spiral sutures:Moderately depressedumb depth:Deepwall texture:Smoothshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Moderately depressedfinal-whorl chambers:6-7 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within T. rohri (-Ma, top in "Holocene" stage). Data source: copied from Chronos database, but zonal name updated from T. bejaouaensis to T. rohri
First occurrence (base): within L. cabri zone (119.05-120.55Ma, base in Aptian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

References:

Longoria, J. F. (1974). Stratigraphic, morphologic and taxonomic studies of Aptian planktonic foraminifera. Revista Española de Micropaleontología. Numero Extraordinario: 5-107. gs


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

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