CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia opima continuosa Blow 1959

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 -> Globorotalia -> Globorotalia opima continuosa
Other pages this level: << < G. miroensis, G. mohleri, G. monmouthensis, G. multiloculata, G. munda, G. nagappai, G. nana pseudocontinuosa, G. nartanensis, G. naussi, G. neominutissima, G. nicobarica, G. nicolae, G. nicoli, G. obesa, G. occlusa, G. opima continuosa, G. opima nana, G. opima opima, G. orientalis, G. oscitans, G. palmerae, G. paniae, G. pentacamerata, G. perclara, G. perconigi, G. perforataminuta, G. pertenuis, G. petaliformis, G. planocompressa, G. planocompressa evoluta, G. planocompressa planocompressa, > >>

Globorotalia opima continuosa

Citation: Globorotalia opima continuosa Blow 1959
Rank: sub-species
Type locality: near Pozon, eastern Falcon; Venzuela
Type sample and level: From sample, No. RM 19542, auger line near Pozon, eastern Falcon;
Holotype Repository: Washington; USNM
Type & figured specimens: Holotype: Plate 19, figures 125a-c, deposited in U.S.N.M. collection. No. 625711.

Linked specimens: USNM-625711 USNM-625712

Current identification/main database link: Paragloborotalia continuosa (Blow, 1959)


Original Description
Test low trochospiral; spire opening rather rapidly, with four chambers in the last whorl; equatorial periphery lobate; axial periphery rounded, with the test appearing rather parallel-sided in side view; the sutures of the spiral and umbilical sides depressed, radial; chambers ovate to subspherical, but not well separated; umbilicus narrow, deep; aperture with a distinctive lip, interiomarginal, umbilical-extraumbilical, a comparatively high arch which tends to be somewhat elongate normal to the axis of coiling at the periphery, giving a "comma-shaped" appearance in side view (Plate 19, figure 125c). Wall calcareous rather coarsely perforate.

Size: maximum diameter of holotype 0.26 mm.

Extra details from original publication
Remarks: This form differs from Globorotalia opima nana Bolli in having ovate or only merely subspherical chambers, a higher arched aperture with a more distmctive apertural lip, and a rather more coarsely perforate wall structure. Forms transitional to Globorotalia opima nana occur in the Catapsydrax stainforthi Zone, whilst forms transitional to Globorotalia acostaensis Blow, sp. nov. occur in the Globorotalia menardii menardii/Globigerina nepenthes Zone. 

Occurrence
: Ranges from the Catapsydrax stainforthi Zone to the Sphaeroidinella seminulina Zone, Tocuyo and Pozon formations.

References:

Blow, W. H. (1959). Age, correlation, and biostratigraphy of the upper Tocuyo (San Lorenzo) and Pozon Formations, eastern Falcon, Venezuela. Bulletins of American Paleontology. 39(178): 67-251. gs

Leckie, R. M. et al. (2018). Taxonomy, biostratigraphy, and phylogeny of Oligocene and Lower Miocene Paragloborotalia and Parasubbotina. In, Wade, B. S. , Olsson, R. K. , Pearson, P. N. , Huber, B. T. & Berggren, W. A. (eds) Atlas of Oligocene Planktonic Foraminifera. Cushman Foundation for Foraminiferal Research, Special Publication. 46(Chap 5): 125-178. gs


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Globorotalia opima continuosa compiled by the pforams@mikrotax project team viewed: 31-3-2020

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