CATALOG OF ORIGINAL DESCRIPTIONS: Globigerina nepenthes Todd 1957
This page provides data from the catalog of type descriptions. The catalog is sorted alphabetically. Use the current identification link to go back to the main database.
Citation: Globigerina nepenthes Todd 1957taxonomic rank: speciesType specimens: 624037Type age (chronostrat): Miocene, Tagpochau limestone, Donni sandstone member. Occurs also in the lower Miocene Lengua formation, Globorotalia mayeri and Globorotalia menardti zones (Trinidad), and in an apparently older horizon (Cuba).Type locality: Holotype from locality S621, east-central Saipan, Mariana Islands. Found also at numerous localities in Cuba, Dominican Republic, Trinidad, Morocco, and Kabu, East Java. Abundant at the type locality and at several other Donni localities.Type repository: Washington; USNM
Original Description "Test small, compactly coiled except for the last formed protruding chamber; height of spire ranges between three-quarters of and equal to diameter of spire. Chambers indistinct, slightly inflated; four chambers constituting the last whorl, with a fifth elongate chamber extending downward and at an angle to the axis of coiling. Sutures indistinct, except the last few which are indented. Wall thin, calcareous, perforate, ornamented by a rather coarse cancellation. Aperture large and semicircular or broad and arched at the umbilical edge of the protruding chamber, bordered by a thickened and slightly upturned lip of clear shell material. Size: Diameter exclusive of protruding chamber 0.30-0.37 mm.; greatest dimension of test 0.42-0.58 mm. Extra details from original publication This species is distinctive in its protruding final chamber, and this character is quite uniform so it cannot be regarded as an abnormality. The species shows a wall ornamentation somewhat similar to that of Globigerinoides sacculifer (Brady), and both species have distinctly shaped final chambers. The adult test of Globigerina nepenthes is much smaller, however, and the widely open aperture, as well as the protruding thumblike final chamber, serves to distinguish it easily.""
References:
Todd, R. (1957). Smaller foraminifera, in Geology of Saipan, Mariana Islands, Pt. 3, Paleontology. U.S. Geological Survey, Professional Paper. 280-H: 265-320. gsO
Globigerina nepenthes compiled by the pforams@mikrotax project teamviewed: 19-9-2024
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