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Globorotalia mediterranea Catalano & Sprovieri 1969 from: Iaccarino, S. (1985): Mediterranean Miocene and Pliocene planktic foraminifera. In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 283-314
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Anonymous: Unedited TaxonConcept data
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Species Globorotalia mediterranea Catalano & Sprovieri 1969


Discussion / Comments:
Iaccarino (1985):
This species was regarded by its authors as a subspecies of G. miocenica Palmer. Both forms have a flat spiral side. They differ in the aperture which is bordered by a distinct lip in G. mediterranea, in the ventral side which is more conical in G. miocenica and in the angle formed by the peripheral margin with the ventral side which is more acute in G. miocenica. G. mediterranea shows close similarities to G. conomiozea, which may make a separation difficult. Zachariasse (1975), in fact, included both forms under G. conomiozea. Berggren (1977b), instead, separated the two taxa primarily on the basis that the predominantly 5 chambered G. mediterranea disappears near the Miocene Pliocene boundary on the Rio Grande Rise, whereas the 5 chambered conomiozea continues well into the Pliocene. Cita & Ryan (1978) and Colalongo et al. (1979b) retained the two taxa as distinct entities and, in agreement with Chapronière (1973), they support the evolutionary lineage of G. conomiozea from G. miotumida. This trend, even though not well marked, is also recorded in the Mediterranean area. Berggren (1977b) suggested that the low, moderately conical 5-6 chambered G. miozea is replaced by a relatively high conical 5-6 chambered form assigned to G. mediterranea. Nevertheless the specimens figured by him as G. miozea are not typical because the ventral side is too high, especially the last chamber. At least some of the specimens ascribed to G. miozea have probably to he included in G. mediterranea. In the Mediterranean area transitional forms from G. miozea to G. mediterranea have not been observed. The suggestion that G. mediterranea is a variant or morphotype of G. conomiozea is not supported by the stratigraphic record because the appearance of G. mediterranea, precedes that of G. conomiozea. For a comparison of G. mediterranea with G. miozea and G. conomiozea reference is made to Chapter 7 of this volume, where the two species are figured. The stratigraphic range of G. mediterranea in the Mediterranean Basin is restricted to the Late Miocene (latest Tortonian Early Messinian). Its appearance is used by several authors (Bizon, Bizon & Montenat, 1975; (Iaccarino et al., 1975; Zachariasse, 1975; Berggren, 1977b) for recognition of the Tortonian Messinian boundary. Actually G. mediterranea appears immediately prior to G. conomiozea in the upper part of the G. suterae Subzone (Colalongo et al., 1979b).
Synonym list:
Iaccarino (1985):
1969 Globorotalia miocenica mediterranea Catalano & Sprovieri. - Catalano & Sprovieri : p.522 pl. 2, figs. 6a-c
1985 Globorotalia mediterranea Catalano & Sprovieri. - Iaccarino : p.305 figs. 6.2; 4
References:

Catalano,R.. and Sprovieri,R.. (1969):
Stratigrafia e micropaleontologia. dell intervallo tripolaceo, di torrente Rossi (Enna) . Atti Accad. gioenia Sci. not. Catania Vol. 7(1) p. 513-27

Iaccarino,S. (1985):
Mediterranean Miocene and Pliocene planktic foraminifera.
In: Plankton stratigraphy Eds: Bolli, H.M.Saunders, J.B.Perch-Nielsen, K. p. 283-314
Anonymous: Unedited TaxonConcept data
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