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Globorotalia (Globorotalia) tumida tumida Brady 1877 from: Quilty, P.G.. (1976): Planctonic foraminifera DSDP Leg 34- Nazca Plata . DSDP initial reports Vol. 34
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Subspecies Globorotalia (Globorotalia) tumida tumida Brady 1877


Alternative name:
Diagnosis / Definition:
Kennett & Srinivasan (1983):
Test large, trochospiral, biconvex, spiral side more convex than umbilical side, equatorial periphery ovate, slightly lobulate; axial periphery acute with a heavy keel; five to six wedge-shaped chambers in the final whorl, increasing slowly in size as added; spiral sutures limbate, slightly raised, curved obliquely backward, merging with keel . Umbilical sutures radial, depressed; surface densely and coarsely perforate with pores of uniform sizes, except for pustulate area on umbilical and spiral side. Umbilicus narrow, deep; aperture interiomarginal, extraumbilical-umbilical, a low arch covered by a large platelike lip.
Discussion / Comments:
Kennett & Srinivasan (1983):
Gr. (Gr.) tumida tumida is marked by its large tumid test, exceptionally heavy keel, and rapidly opening spire. Gr. (Gr.) tumida tumida resembles Gr. (Gr.) ungulata, but the latter has a very thin, delicate test and finely perforate surface ultrastructure with flat, smooth-interpore area . In Gr. (Gr.) tumida tumida, however, the surface is penetrated by large pores, lacking the flat, smooth interpore area
Quilty (1976):
Remarks: It is noteworthy that some Pleistocene specimens fromthe piston cores have incipient development of two keels suggestinghomeomorphy with the Cretaceous Globotruncanidae. One is illustrated.
Synonym list:
Kennett & Srinivasan (1983):
1877 Pulvinulina menardii var. tumida Brady. - Brady : p535
1884 Pulvinulina tumida Brady. - Brady : pl 103 figs 4-6 (Type figure)
Quilty (1976):
1877 Globorotalia (Globorotalia) tumida tumida Brady. - Brady : p.535 (plates Brady, 1884, p. 692, pl. 103, figs. 4-6)
1976 Globorotalia (Globorotalia) tumida tumida Brady. - Quilty : p.697 pl. 16, figs. 3-4
Was used in synonym list of:
References:

Brady,H.B. (1877):
Supplementary note on the foraminifers of the Chalk (?)of the New Britain Group . Geological Magazine London Vol. 4

Brady,H.B. (1884):
Report on the foraminifera dredged by H.M.S. Challenger during the years 1873-1876.
In: Report of the scientific results of the voyage of H.M.S. Challenger, 1873-1876, Zoology Vol. 9 p. 1-814

Quilty,P.G.. (1976):
Planctonic foraminifera DSDP Leg 34- Nazca Plata . DSDP initial reports Vol. 34

Kennett,J. and Srinivasan,M.S. (1983):
Neogene Planktonic Foraminifera - A Phylogenetic Atlas.

Anonymous: Unedited TaxonConcept data
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