Catalog - Badriella

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Badriella

Citation: Badriella El-Nakhal 2002

Type species: Badriella mouradi El-Nakhal 2002

Diagnosis. Abathomphalidae with compressed later chambers and an aperture bordered by a porticus.

Description. Test free, trochospiral, umbilicate, axial periphery subangular with nonporous carinal band, equatorial periphery lobulate, chambers compressed, sutures curved on spiral side radial on umbilical side, flush to slightly depressed, surface rugose covered with meridionally arranged rugosities on the umbilical side; aperture an interiomarginal, umbilical– extraumbilical arch, bordered by a narrow lip, supplementary apertures absent; wall calcareous, hyaline, finely perforate, radial in structure.

This new genus is named in honour of the author’s wife Mrs Abla M. El-Badri.

Remarks. In the discussion of his new species Praeglobotruncana loeblichae, Douglas (1969) indicated that meridionally arranged rugosities displayed by that species are features suggestive of the genus Rugoglobigerina, but its apertural characteristics include relationships to the rotaliporids. He added that P. loeblichae exhibits the diagnostic features of the genus Praeglobotruncana Bermudez, but its spinose surface sets it aside from the other species of Praeglobotruncana. These remarks substantiate the necessity of erection of the present new genus to accommodate the forms exhibiting characters related to the two genera Rugoglobigerina and Praeglobotruncana.

Range. Forms which can be included within the present new genus include Praeglobotruncana loeblichae Douglas, 1969, Praeglobotruncana helvetica (Bolli) of Weidich (1984), and Praeglobotruncana praehelvetica (Trujillo) of Weidich (1984). P. loeblichae was recorded from the upper Turonian–lower Coniacian of California and Alaska (Douglas, 1969), whereas P. helvetica and P. praehelvetica of Weidich are recorded from the Turonian and the middle Cenomanian–Turonian of the Bavarian Alps, respectively (Weidich, 1984). Accordingly, the range of Badriella n. gen. is considered to be middle Cenomanian–early Coniacian.

References:

El-Nakhal, H. A. (2002). Classification of the meridionally costellate Cretaceous planktonic foraminifera. Journal of Micropalaeontology. 21: 1-8. gs V O

CATALOG OF ORIGINAL DESCRIPTIONS: Badriella El-Nakhal 2002

Badriella

References:

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