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Species Globorotalia rex Martin 1943


Diagnosis / Definition:
Bolli (1957):
Shape of test, very low trochospiral, spiral side flat or slightly convex, umbilical side strongly convex; equatorial. periphery lobate; axial periphery angular with distinct peripheral keel, often ornamented with spines. Wall calcareous, perforate, surface coarsely spinose. Chambers angular, inflated; about 12, arranged in 2-2 1/2 whorls, the 4-5 chambers of the last whorl increasing rapidly in size. Sutures on dorsal side strongly curved; on umbilical side radial, depressed. Umbilicus narrow, deep, open. Aperture a low arch; interiomarginal, extraumbilical umbilical. Coiling between 90 and 100 percent dextral. Largest diameter of figured hypotype 0.56 mm.
Discussion / Comments:
Bolli (1957):
Globorotalia rex Martin differs from the related G. aequa Cushman and Renz in being more robust and in having a distinct thick peripheral keel. G. rex is regarded as the ancestor of G. aragonensis Nuttall.
Systematics:

20
 Genus Globorotalia
  Species Globorotalia compressa
   Species Globorotalia rex
    Species Globorotalia velascoensis
Synonym list:
Bolli (1957):
non 1883 Globorotalia simulatilis Schwager. - Schwager :
1943 Globorotalia rex Martin. - Martin : p. 117 pl. 8, fig. 2
1953 Globorotalia simulatilis Schwager. - Le Roy : pp. 32-33 pl. 9, figs. 1-3
1957 Globorotalia rex Martin. - Bolli : pl. 18, figs. 10-12
Was used in synonym list of:
Morozovella subbotinae Renz & Morozova 1939
Morozovella acuta Toulmin 1941
References:

Schwager,C. (1883):
Die Foraminiferen aus den Eocaenablagerungen der libyschen Wüste und Aegyptens . Palaeontographica Vol. 30 p. 79-153

Martin,L.T. (1943):
Eocene formainifera from the type Lodo Formation, Fresno County, California . Stanford University Publications Geological Sciences Vol. 3 p. 93-125

Le Roy,L.W. (1953):
Biostratigraphy of the Maqfi section, Egypt. , Memoirs of the Geological Society of America Vol. 54 p. 73 pp.

Bolli,H.M. (1957):
The genera Globigerina and Globorotalia in the Paleocene-Lower Eocene Lizard Springs Formation of Trinidad, B.W.I . Bulletin of the U.S. National Museum Vol. 215 p. 61-82
Anonymous: Unedited TaxonConcept data
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