pforams@mikrotax - Hedbergella kuhryi pforams@mikrotax - Hedbergella kuhryi

Hedbergella kuhryi

Classification: pf_mesozoic -> Hedbergellidae -> Hedbergella -> Hedbergella kuhryi
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> >>


Citation: Hedbergella kuhryi Longoria 1974
taxonomic rank: Species
Basionym: Hedbergella kuhryi
Taxonomic discussion: This species displays a moderate morphological variability regarding the number of chambers (5.5 to 6) in the outer whorl, their elongation degree and consequently the peripheral outline which may be more or less strongly lobate; in addition the spiral side may range from flat to almost pseudoplanispiral. [copied from Chronos database]

Type images:

Original description: Test medium sized; coiled in a low trochospire, formed by about three whorls; peripheral margin stellate; five to six chambers in the last whorl increasing gradually in size as added; first chambers spherical, last two or three chambers elongate, acute and somewhat compressed; spherical to elongate in peripheral view; sutures straight, depressed on both spiral and umbilical sides; primary aperture extraumbilical-spiroumbilical bordered by an imperforate porticus; umbilicus wide and shallow relict flaps often observed umbilically.

Entries in the Catalog of original descriptions: Hedbergella kuhryi

Emended description:

Test medium sized, trochospirally coiled, slightly laterally compressed; 5.5 to 6 chambers in the outer whorl, increasing rather fast in size as added; chambers initially globular to subglobular, the last two or three tending to become radially elongate, laterally compressed and pointed at their end; spiral side flat tending to pseudoplanispirality; peripheral outline subcircular, strongly lobate to stellate; sutures straight to slightly curved on both spiral and umbilical sides; umbilicus broad and shallow; aperture as a low extraumbilical arch reaching the periphery. Wall smooth and finely perforate. [copied from Chronos database]

Character matrix
test outline:Stellatechamber arrangement:Trochospiraledge view:Compressedaperture:
sp chamber shape:Elongatecoiling axis:Very lowperiphery:N/Aaperture border:Thin lip
umb chbr shape:Elongateumbilicus:Wideperiph margin shape:Subangularaccessory apertures:N/A
spiral sutures:Strongly depressedumb depth:Shallowwall texture:Smoothshell porosity:Finely Perforate: 1-2.5µm
umbilical or test sutures:Strongly depressedfinal-whorl chambers:5.5-6 N.B. These characters are used for advanced search. N/A - not applicable

Geological Range:
Last occurrence (top): within G. algerianus zone (116.86-118.24Ma, top in Aptian stage). Data source: [copied from Chronos database]
First occurrence (base): within G. blowi zone (120.55-124.40Ma, base in Barremian 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 kuhryi compiled by the pforams@mikrotax project team viewed: 19-6-2024

Taxon Search:
Advanced Search

Short stable page link: Go to to create a permanent copy of this page - citation notes

Add Comment

* Required information
Captcha Image
Powered by Commentics


No comments yet. Be the first!