Catalog - Globorotalia praemiocenica Catalog - Globorotalia praemiocenica

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia praemiocenica Lamb & Beard 1972

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 praemiocenica
Other pages this level: << < G. pentacamerata, G. perclara, G. perconigi, G. perforataminuta, G. pertenuis, G. petaliformis, G. planocompressa, G. planocompressa evoluta, G. planocompressa planocompressa, G. planoconica, G. planoconvexa, G. platispira, G. pliozea, G. praemargaritae, G. praemenardii, G. praemiocenica, G. praenartanensis, G. praepseudomenardii, G. pseudochapmani, G. pseudocrassa, G. pseudomayeri, G. pseudomenardii, G. pseudomiocenica, G. pseudopachyderma, G. pseudoscitula, G. pseudoscitula elongata, G. pseudospinulosa, G. pshadae, G. pumilio, G. puncticulata padana, G. puncticulata puncticuloides> >>

Globorotalia praemiocenica

Citation: Globorotalia praemiocenica Lamb & Beard 1972
taxonomic rank: species
Type specimens: Holotype figure 1; paratypes figures 2, 3, 6
Type age (chronostrat): Pulleniatina obliquiloculata Zone, Pliocene
Type locality: Gulf of Mexico slope core hole A, core 8, at a depth of 14.0 to 15.3 feet
Type repository: Washington; USNM

Linked specimens: USNM-225306 USNM-225308 USNM-225307 USNM-225309

Current identification/main database link: Globorotalia limbata d'Orbigny, in Fornasini 1902


Original Description

Test average size for genus; chambers dorsoventrally compressed, finely perforate and coiled in low trochospire with 5 to 7 chambers in last whorl of adult; peripheral margin of chambers distinctly lobate and carinate; spiral side commonly strongly convex, giving biconvex appear- ance to test in end view; aperture single-sutural, extending from umbilicus to peripheral margin of test, and furnished with thin lip; sutures on umbilical side depressed and on spiral side strongly recurved and limbate.

Extra details from original publication
Discussion: This species developed during the early Pliocene and gave rise to G. miocenica in the late Pliocene. There is suspicion that it is also an evolutionary antecedent of G. multicamerata. Globorotalia praemiocenica differs from G. multicamerata in having higher arched chambers and a thin caria and from G. miocenica in having a distinct lobulate peripheral chamber margin and typically a strongly convex spiral side. The type locality for G. limbata is redeposited fossil sediment of probable middle Miocene age from near Rimini, Italy, which is also the type locality for G. menardii. Observable differences between these two species are negligible. Similarly, G.pseudomiocenica Bolli & Bermudez (1965), described from the early late Miocene of coastal Venezuela, is more closely akin to G. menardii than to G. praemiocenica, n. sp.

References:

Lamb, J. L. & Beard, J. H. (1972). Late Neogene planktonic foraminifers in the Caribbean, Gulf of Mexico, and Italian stratotypes,. University of Kansas Paleontological Contributions, Articles. 57: 1-67. gs O


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Globorotalia praemiocenica compiled by the pforams@mikrotax project team viewed: 20-4-2024

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