Catalog - Globorotalia mariae gratiae Catalog - Globorotalia mariae gratiae

CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia mariae subsp. gratiae Salvatorini, Foresi, Riforgiato&Verducci 2011

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 mariae gratiae
Other pages this level: << < G. limbata conferta, G. limbata consutila, G. limbata latiumbilicata, G. limbata oregope, G. lobata, G. loeblichi, G. lupeae, G. magnifica, G. margaritae, G. margaritae evoluta, G. margaritae primitiva, G. marginaculeata, G. marginodentata, G. marginodentata propelleriformis, G. mariae, G. mariae gratiae, G. mariae mariae, G. marksi, G. martinezi, G. mattseensis, G. mayeri, G. mayeri nympha, G. menardii antarctica, G. menardii fijiensis, G. menardii gibberula, G. menardii jamesbayensis, G. menardii miocenica, G. menardii miotumida, G. menardii multicamerata, G. menardii neoflexuosa, G. menardii panda> >>

Globorotalia mariae gratiae

Citation: Globorotalia mariae subsp. gratiae Salvatorini, Foresi, Riforgiato&Verducci 2011
Taxonomic rank: sub-species
Type sample (& lithostrat): Upper Globigerina Limestone member (Globigerina Limestone Formation).
Type age (chronostrat): Sample MF2 from Marsalforn Section, Langhian, Globigerinoides sicanus/Orbulina suturalis Zone, MMi4 (P. glomerosa circularis Subzone, MMi4d)
Type locality: Marsalforn, on the northern coast of Gozo Isle (Maltese Archipelago).
Type repository: Sienna: Micropaleontology Laboratory of the Department of Earth Sciences, University of Siena (Via Laterina 8, 53100 Ð Siena, Italy).

Current identification:


Original Description

Test a low trochospire composed of 14 chambers moderately increasing in size as added; five chambers in the last whorl. Equatorial profile a little elongated, equatorial periphery weakly lobulate. Test surface almost flat on the spiral side, much convex on the umbilical side; axial profile ventro- conical, with a sub-rounded periphery.
On the spiral side the chambers are tangentially longer than wide, showing an asymmetrical outer margin. On the ventral side, the chambers are swollen around the umbilicus. From the chamber apex the surface of the chambers slopes steeply down towards both the umbilicus and the periphery. Sutures slightly depressed and moderately curved on both spiral and umbilical sides. Umbilicus narrow. Aperture an umbilical-extraumbilical low arch bordered by a prominent lip.
The surface is shiny, with a finely perforated wall texture. Some pustules develop on the umbilical area of the chambers, particularly on the first chamber of the final whorl.

Extra details from original publication
Intra-specific variability: equatorial periphery sometimes subcircular; it is often more elliptical and can be more or less lobulate than in the holotype. The umbilical convexity is highly variable, determining a more or less developed ventroconical profile. As a consequence, also the axial profile can vary much. Rarely, specimens have six chambers in the last whorl. Often, the final chamber (or the last two chambers) is (are) as wide as long, while the earlier ones appear as in G. mariae mariae n. subsp. Rarely the aperture is an arch higher than in the holotype. On the ventral side, the pustules may cover also the last chambers.

Remarks: G. mariae gratiae n. subsp. differs from G. mariae mariae n. subsp. in having a flatter spiral surface. The chambers have a less convex surface on the spiral side; they are less short tangentially than in G. mariae mariae and more inflated ventrally. The equatorial profile is more subcircular, and the periphery is more rounded.

G. conica Jenkins, another ventroconical species from the Middle Miocene (Clifdenian to Waianan, Langhian to Serravallian) of the southwest Pacific area (Jenkins 1960, 1971, 1985; Cifelli and Scott 1986; Hornibrook et al. 1989; Scott et al. 1990) differs from G. mariae gratiae for its more subquadrate outline, the more conical profile in axial view, the more angular periphery, sometimes with a rim or a weak keel. The chamber surface is flatter on the spiral side and the chambers are longer tangentially. The early whorls form a dome above the spiral surface.

G. quinifalcata Saito and Maiya from the Middle Miocene (Zone N.9) of Japan resembles G. mariae gratiae n. subsp., but it shows 4-5 chambers in the final whorl (instead of 5-6), more strongly curved sutures, tangentially longer chambers on the spiral side, and a higher arched aperture.

Stratigraphic range: Middle Miocene, Langhian to Serravallian; from G. sicanus/O. suturalis Zone (MMi4) (Paragloborotalia siakensis/P. glomerosa circularis Subzone, MMi4c) to the basal part of the Paragloborotalia partimlabiata Zone (MMi7) (P. partimlabiata-Globoturborotalita druryi Subzone, MMi7a).

References:

Salvatorini, G., Foresi, L. M., Riforgiato, F. & Verducci, M. (2011). Salvatorini, G., Foresi, L. M., Riforgiato, F. & Verducci, M. (2011). Globorotalia mariae mariae and G. mariae gratiae: Two new planktonic Foraminifera from the Middle Miocene of the Mediterranean. Stratigraphy. 8(02-Mar): 189-198. Stratigraphy. 8(2-3): 189-198. gs

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Globorotalia mariae gratiae compiled by the pforams@mikrotax project team viewed: 20-7-2025

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Comments (3)

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I would very appreciate.

Have a good day,

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Globorotalia subsp. mariae gratiae (subsp. after mariae). Is G. mariae a new comb. or was described by Salvatorini et al. (2011)? Thanks, François

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Thanks for pointing out the problem with the citation. The paper described both the species and its two sub-species - although the species did not get a separate description or diagnosis. I can send you a copy o the paper if you want it.