pforams@mikrotax - Hedbergella labocaensis pforams@mikrotax - Hedbergella labocaensis

Hedbergella labocaensis

Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella -> Hedbergella labocaensis
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, H. semielongata, H. sigali, H. similis, H. speetonensis> >>


Citation: Hedbergella labocaensis Longoria 1974
taxonomic rank: Species
Basionym: Hedbergella labocaensis
Taxonomic discussion: Specimens of H. labocaensis are distinguished by having a minute test, with a moderately low trochospire; lobate equatorial periphery; petalloid chambers in the last whorl, increasing rapidly in height; last and penultimatimate chambers often extending over the umbilicus, which is narrow and deep. It differs from H. semielongata in having less elongate chambers in the last whorl and a smaller umbilicus.
[copied from Chronos database]

Type images:

Original description: Medium sized, test as with genus; consisting of three whorls; earlier whorls coiled in higher plane than final whorl; peripheral margin circular, lobate; six to seven chambers in the last whorl; petaloid on both spiral and umbilical sides, spherical to ovoid in peripheral view; ultimate and penultimate chambers often protruding towards the umbilical area; sutures radial, curved and depressed on both spiral and umbilical sides; umbilicus narrow, circular, deep; primary aperture extraumbilical-spiroumbilical, bordered by an imperforate Cap; relict flaps often visible in umbilical view.

Entries in the Catalog of original descriptions: Hedbergella labocaensis

Character matrix
test outline:Stellatechamber arrangement:Trochospiraledge view:Compressedaperture:-
sp chamber shape:Inflatedcoiling axis:Lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Inflatedumbilicus:Narrowperiph margin shape:Broadly roundedaccessory apertures:Relict
spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:Microperforate: <1µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:6-7 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within P. cheniourensis zone (118.02-118.93Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. ferreolensis zone (118.24-118.56Ma, base in Aptian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:


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


Hedbergella labocaensis compiled by the pforams@mikrotax project team viewed: 21-7-2024

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