Todd 1957 pl74 f10.JPG
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Todd 1957 pl74 f10.JPGLinked specimens: USNM-689871 USNM-689869 USNM-689870 USNM-689871 USNM-689869 USNM-689870
Current identification/main database link:
Original Description
"Test large for the genus, loosely coiled, very high-spired, triserial. Chambers large, inflated. Sutures distinctly incised. Wall calcareous, perforate, orname nted with closely spaced, blunt spines. Apertures several, the main one a large high-arched opening into the last chamber at the junction between that chamber and the last suture separating the two preceding chambers; supplementary apertures much smaller arched openings, situated in the incised areas of suture junctions.
Size: Maximum dimension of test 0.60-0.80 mm.
Extra details from original publication
Except for the final chamber, this species resembles a giant Globigerinoides ruber (d'Orbigny) [Globigerina rubra d'Orbigny, 1839] in its chamber arrangement, but the supplementary apertures are much smaller. None of the chambers show any peripheral flattening nor does the final chamber appear to balance the rest of the test, as it does in G. rubra. This species differs from the Miocene form Globigerinoides mitra Todd from the Donni sandstone (Saipan) in having a more inflated and loosely coiled test and fewer chambers per whorl (three instead of as many as six). That G. pseudoruber may be an advanced stage of Globigerinoides subquadratus Brönnimann is a possibility, though rather a remote one because of the prominent spire in G. pseudoruber.
References:
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Globigerinoides pseudoruber compiled by the pforams@mikrotax project team viewed: 18-1-2021
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