CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina parabulloides 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 -> Globigerina -> Globigerina parabulloides
Other pages this level: << < G. nilotica, G. nipponica, G. nitida, G. nodosa, G. occlusa, G. officinalis, G. officinalis crux, G. oligocaenica, G. orbiformis, G. ouachitaensis, G. ouachitaensis gnaucki, G. ouachitaensis senilis, G. ovoidea, G. oxfordiana, G. panormensis, G. parabulloides, G. paradubia, G. paraobesa, G. paratriloculinoides, G. paravenezuelana, G. parisiensis, G. partidiana, G. parva, G. patagonica, G. pauciloculata, G. pera, G. picassiana, G. pileata, G. planispira, G. planoexilis, G. polusi> >>

Globigerina parabulloides

Citation: Globigerina parabulloides Blow 1959
Rank: species
Type locality: near Pozon, eastern Falcon, Venezuela
Type sample (& lithostrat): sample, No. RM 19791, auger line near Pozon, eastern Falcon
Type specimens: 625699
Type repository: Washington; USNM

Linked specimens: USNM-625700 USNM-625699

Current identification/main database link:


Original Description
Test trochospiral with 9-10 chambers arranged in about three whorls and with four chambers m the last whorl; chambers ovate to subspherical, inflated and rather embracing, sometimes slightly appressed, increasing moderately rapidly in size as added so that the equatorial profile of the test appears distinctly elongate in the direction of the last chamber; equatorial periphery strongly lobate; axial periphery rounded; sutures of the spiral side depressed, radial to slightly curved; sutures of the umbilical side depressed but not deeply incised, radial; umbilicus small, rather shallow; aperture a low arch restricted in lateral extent to the umbilical depression, interiomarginal, umbilical, and with a distinct lip or thickened rim; wall calcareous, perforate, rather thick.

Size: maximum diameter of holotype, 0.34 mm.

Extra details from original publication
Remarks: This species differs from Globigerina praebulloides Blow, sp. nov. in having a laterally restricted aperture with a distinctive lip or thickened rim, a small and shallow umbilicus, a distinctly more trochospiral test which is more precisely coiled and inflated chambers.

This species differs from Globigerina bulloides d'Orbigny in having a much smaller and restricted aperture, a smaller umbilicus, less deeply incised sutures and an elongate equatorial profile.  Globigerina parabulloides is considered to be descended from Globigerina praebulloides but appears earlier than Globigerina bulloides. Transitional forms from Globigerina praebulloides to Globigerina parabulloides occur in the Globorotalia mayeri/Glohorotalia lenguaensis Subzone.

Occurrence: Ranges from the Globorotalia mayeri/Globorotalia lenguaensis Subzone to the Globigerina bulloides Zone, Pozon formation.

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


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Globigerina parabulloides compiled by the pforams@mikrotax project team viewed: 27-11-2020

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