CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina rotundata jacksonensis Bandy 1949

This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.


Higher levels: pf_cat -> G -> Globigerina -> Globigerina rotundata jacksonensis
Other pages this level: << < G. quadritriloculinoides, G. quinqueloba, G. quinqueloba egelida, G. radians, G. regina, G. regularis, G. reticulata, G. ridenda, G. riveroae, G. roblesae, G. rohri, G. rosacea, G. rosetta, G. rotundaenana, G. rotundata, G. rotundata jacksonensis, G. rubescens, G. rubra, G. rudis, G. rugosa, G. rustica, G. sabina, G. sacculifera, G. sakitoensis, G. sallentina, G. santamariaensis, G. sastrii, G. scabrosa, G. scalena, G. schachdagica, G. scobinata> >>

Globigerina rotundata jacksonensis

Citation: Globigerina rotundata jacksonensis Bandy 1949
Rank: sub-species
Type locality: locality 58
Type age (chronostrat): Eocene
Type sample (& lithostrat): Jackson
Type specimens: Plate 23, figs, 6a-c; Holotype.—No. 4907; desc p.151-2
Type repository: Indiana University, Paleontologic Laboratory,

Current identification/main database link: Subbotina jacksonensis (Bandy 1949)


Original Description
Test subglobular, trochoid, dorsal side rather convex, ventral side very deep due to the very rapid increase in height of the chambers except for the last one. which is always very low and flattened; periphery lobulate; edge broadly rounded, only a very slight shoulder ; whorls about three, the last having nearly four chambers; sutures considerably- depressed, slightly curved; wall rather coarsely reticulate but fairly smooth; aperture a moderately high arch on the septal face of the final small chamber opening above a very small umbilicus. Common.

Size: Diameter, 0.53 mm; thickness, 0.46 mm.

Extra details from original publication
The contrast of the antepenultimate and penultimate chambers with the small, flattened last chamber is a characteristic which easily distinguishes this variety from G. rotundata d'Orbigny (see Fornasini, 1898 p. 208, tf. 3).

References:

Bandy, O. L. (1949). Eocene and Oligocene foraminifera from Little Stave Creek, Clarke County, Alabama. Bulletins of American Paleontology. 32(131): 1-210. gs

Fornasini, C. (1898). Le Globigerine fossili d'Italia. Palaeontographia Italica. 4: 203-216. gs V O

Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (2006a). Taxonomy, biostratigraphy, and phylogeny of Eocene Globigerina, Globoturborotalita, Subbotina, and Turborotalita. In, Pearson, P. N., Olsson, R. K., Hemleben, C., Huber, B. T. & Berggren, W. A. (eds) Atlas of Eocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 41(Chap 6): 111-168. gs V O

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Globigerina rotundata jacksonensis compiled by the pforams@mikrotax project team viewed: 15-6-2021

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