Catalog - Globorotalia pliozea Catalog - Globorotalia pliozea

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia pliozea Hornibrook 1982

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 pliozea
Other pages this level: << < 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, 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> >>

Globorotalia pliozea

Citation: Globorotalia pliozea Hornibrook 1982
taxonomic rank: Species
Type specimens: Holotype and 8 paratypes, NZGS Reg. TF1597.
Type age (chronostrat): Basal Pliocene
Type locality: DSDP Site 284, core 13-4-100, basal Pliocene.
Type repository: Lower Hutt; NZGS

Current identification/main database link: Globoconella pliozea (Hornibrook 1982)

Original Description

Test moderately convex dorsally and ventrally, 4-4½, chambers in the final whorl, a moderately strong, hispid, peripheral keel, chambers about twice as broad as high on spiral side, strongly embracing on ventral side giving the appearance of rapid increase in size with growth; final chamber very broad ventrally, test usually lacking an umbilicus, ventral sutures very gently recurved, aperture a narrow slit with a small, lipped median arch.

Holotype, greatest diameter 0.90 mm.

Extra details from original publication
Remarks: The unusually strongly embracing chambers on the ventral side, together with the very low arched aperture, relatively compressed shape, and hispid keel, give G. pliozea a very distinctive character. G. pliozea appears earliest in core 5-3 coiling predominantly dextrally (2S:60D). Populations coil randomly in the upper part of core 15, predominantly dextrally (3S:50D) in 14-6, sinistrally (6S:2D) in 14-4, dextrally (lS:9D) in 14-3 and 14-2, and then sinistrally in cores 13 (60S:5D), 12, 11, and 10.
Distinctly plano-conical populations with less-embracing chambers, in core 9, are tentatively included as variants of G. pliozea.
G. pliozea
is common in the Pliocene of the East Coast Basin, North Island, appearing in the Mangapoike River section at the same level as G. crassaformis, immediately above the range-zone of G. sphericomiozea. As in Site 284, it appears coiling dextrally and undergoes 2 or 3 reversals of dominant coiling direction in the lower Opoitian before adopting a stable sinistrally coiling habit.


Hornibrook, N. d. B. (1982). Late Miocene to Pleistocene Globorotalia (Foraminiferida) from Deep Sea Drilling Project Leg 29, Site 284, Southwest Pacific. New Zealand Journal of Geology and Geophysics. 25: 83-99. gs


Globorotalia pliozea compiled by the pforams@mikrotax project team viewed: 11-12-2023

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