CATALOG OF ORIGINAL DESCRIPTIONS: Globorotalia oscitans Todd 1958

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.


Higher levels: pf_cat -> G -> Globorotalia -> Globorotalia oscitans
Other pages this level: << < G. munda, G. nagappai, G. nana pseudocontinuosa, G. nartanensis, G. naussi, G. neominutissima, G. nicobarica, G. nicolae, G. nicoli, G. obesa, G. occlusa, G. opima continuosa, G. opima nana, G. opima opima, G. orientalis, G. oscitans, G. palmerae, G. paniae, G. pentacamerata, G. perclara, G. perconigi, G. perforataminuta, G. pertenuis, G. petaliformis, G. planocompressa, G. planocompressa evoluta, G. planocompressa planocompressa, G. planoconica, G. planoconvexa, G. platispira, G. pliozea, > >>

Globorotalia oscitans

Citation: Globorotalia oscitans Todd 1958
Rank: species
Type locality: Southeast of Sardinia, in the Mediterranean Sea.; core 11 lat. 38°52' N., long. 10° 35' E
Type age: Pleistocene or Recent
Type sample and level: Sample 54, 529.5-530 cm. below the surface of core 011, taken at 2444 meters
Holotype Repository: Washington; USNM
Type & figured specimens: Holotype no. 625471.

Linked specimens: USNM-625471

Current identification/main database link: Globoconella inflata (d’Orbigny, 1839)


Original Description
Test planoconvex, coiled almost 100 percent sinistrally, periphery rounded, dorsal outline of test rounded, quadrangular; chambers few, large, rapidly increasing in size (particularly thickness) as added, four making up the final whorl, slightly inflated; sutures distinct, slightly depressed, nearly straight and radial; wall calcareous, perforate, densely covered with fine blunt spines; aperture very large, about as high as wide, surrounded by an inbent portion of the chamber and rimmed by a very narrow smooth lip.

Size: Diameter about 0.30 mm.; thickness about 0.25 mm.

Extra details from original publication
This species differs from Globorotalia hirsuta (d'Orbigny) in having a thicker and more inflated test with rounded periphery, and in its large and high arched aperture. In the nature of the aperture it rather resembles a species described as trigonula d'Orbigny (Cushman, 1941, Cushman Lab. Foram. Res., Contr., vol. 17, pt. 2, p. 1p, pl. 11, fig. 6) from off St. Helena in the Atlantic Ocean and apparently never recorded from anywhere else. It has, however, an even more globular form and more nearly circular aperture and the final whorl is composed of four instead of three chambers .

Globorotalia oscitans differs from inflata d'Orbigny chiefly in type of wall surface which in the latter is smooth and polished but with the dense perforations through the wall giving the appearance of spinosity. Globigerina inflata, a considerably larger species, also differs in the whole test being more involutely coiled and in the aperture being less highly arched.

Fairly abundant in many other cores from the Mediterranean

References:

Todd, R. (1958). Foraminifera from western Mediterranean deep-sea cores. Reports of the Swedish Deep-Sea Expedition, 1947-1948. 8(2): 169-215. gs


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Globorotalia oscitans compiled by the pforams@mikrotax project team viewed: 8-12-2019

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