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Species Globoquadrina conglomerata Schwager 1866


Discussion / Comments:
Chaisson & Leckie (1993):
Remarks: Globoquadrina conglomerata is a large to very large species with a large, open umbilical aperture surmounted by a triangular tooth on the final chamber. The test is distinctly cancellate. Seen in edge view, the chambers can be spherical or slightly laterally compressed. The variation in chamber shape shows no monotonic stratigraphic trend. There are three and half to four chambers in the final whorl. Thompson and Sciarrillo (1978) consider G. conglomerata and G. pseudofoliata to be descendants of G. venezuelana. Kennett and Srinivasan (1983) think that G. venezuelana and G. baroemoenensis are unrelated and that the latter species is synonomous with G. conglomerata. In Hole 806B, a morphological cline exists among all four species. G. conglomerata and G. pseudofoliata are sufficiently similar morphologically and mixed stratigraphically to be considered synonymous. Similar species: Evolution from G. venezuelana involved inflation of the chambers, a widening of the umbilicus, and broadening of the base of the umbilical tooth (Parker, 1967; Thompson and Sciarrillo, 1978). Some specimens retain the tendencies of G. venezuelana toward axially elongate chambers and an irregular final chamber, but they always have a more open umbilicus. The ventral sides of chambers of G. conglomerata tend to be more inflated than those of G. baroemoenensis.
Synonym list:
Vincent & Toumarkine (1990):
1866 Globigerina conglomerata Schwager. - Schwager : pl. 7, fig. 113
1960 Globigerina conglomerata Schwager. - Banner & Blow : pl 2, fig. 3 (neotype)
1990 Globoquadrina conglomerata Schwager. - Vincent & Toumarkine : p. 835 pl. 6, fig. 21
Chaisson & Leckie (1993):
1866 Globoquadrina conglomerata Schwager. - Schwager : p.255 pl. 7; fig. 113
1962 Globoquadrina conglomerata Schwager. - Parker : p.240 pl. 6; fig. 11-18
1967 Globoquadrina conglomerata Schwager. - Parker : p.165 pl. 27; fig. 4
1967 Globoquadrina pseudofoliata Parker. - Parker : p.170 pl. 27; fig. 1-3
1993 Globoquadrina conglomerata Schwager. - Chaisson & Leckie : p.177 pl. 9; fig. 1
References:

Schwager,C. (1866):
Fossile Foraminiferen von Kar Nikobar, Reise der Oesterreichischen Fregatte Novara um Erde in den Jahren 1857, 1858, 1859 unter den Befehlen des Commodore B. Von Wuellerstorf-Urbair . Geologischer Theil,Geologische Beobachtung no. 2, Palaeontologische Mittheilung Vol. 2(1) p. 187-268

Banner,F.T. and Blow,W.H. (1960):
Some primary types of species belonging to the superfamily Globigerinaceae . Contributions from the Cushman Foundation for Foraminiferal Research Vol. 11(1) p. 1-41

Parker,F.L. (1962):
Planktonic foraminiferal species in Pacific sediments . Micropaleontology Vol. 8 p. 219-254

Parker,F.L. (1967):
Late Tertiary biostratigraphy (planktonic foraminifers) of tropical Indo-Pacific deep-sea cores . Bull. Am. Paleontol. Vol. 52

Vincent,E. and Toumarkine,M. (1990):
Neogene planktonic foraminifers from the Western Tropical Indian Ocean, Leg 115.
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 115 Eds: Duncan, R.A..Backman, J.Peterson, L.C. p. 795-836

Chaisson,W.P. and Leckie,R.M. (1993):
High-Resolution Planktonic Foraminifer Biostratigraphy of Site 806, Ontong Java Plateau (Western Equatorial Pacific).
In: Proceedings of the Ocean Drilling Program, Scientific Results Vol. 130 Eds: Berger, W.H.Kroenke, L.W..Mayer, L.A..et al. p. 137-178
Anonymous: Unedited TaxonConcept data
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