CATALOG OF ORIGINAL DESCRIPTIONS: Schackoinella tricamerata Mohan and Soodan 1969
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.
Schackoinella tricamerata Mohan and Soodan 1969 1.jpg
Schackoinella tricamerata
Citation: Schackoinella tricamerata Mohan and Soodan 1969Rank: SpeciesType specimens: p. 10, tf. IG-I. holotype, no. ONGC K 260; and unfigured paratype, no. ONGC K 262. Type sample (& lithostrat): Globigerinoides kugleri Globigerina frontosa Assemblage zone.Type age (chronostrat): Middle Eocene, Lutetian, Type locality: Holotype (tf. 1G-1) from a section along Berwali stream, between Beranda (lat. 23°33'40" N., long. 68°40'35" E.) and Bernana (lat. 23°26'35" N., long. 68°37' E.), western Kutch, India. Type repository: Dehra Dun; Palaeontology Laboratory, Oil and Natural Gas Commission, Dehra Dun, India;
Current identification:
Original Description Test trochospiral: spiral side with 9-10 chambers, inflated, rapidly increasing in size with growth; each chamber with a thick projecting spine; umbilical side with three chambers; sutures distinct, slightly depressed or flushed and curved on the spiral side; distinctly depressed and slightly curved on the umbilical side: wall calcareous, finely perforate, radial in structure; surface smooth: aperture a high arch, umbilical, at the base of the final chamber. Size: Dimensions of the holotype. - Larger diameter 0.22 mm., shorter diameter 0.17 mm., thickness 0.1 2 mm. Etymology: Extra details from original publication Remarks. - Schackoinella tricamerata differs from Schackoinella sarmatica in having only three chambers on the umbilical side and in showing a rapid increase in the size of chambers with growth. The authors have critically examined the wall structure of this species and have found it to be distinctly radial. Considering the trochospiral coiling as well, the authors favour its placement with the Glabratellidae, as suggested by Loeblich and Tappan (1964, in: Moore (Ed.), Treatise on Invertebrare Paleontology. New York: Geol. Soc. Amer., pt. C, Protista 2, vol. 2, pp. C587, C591). Editors' Notes
References:
Mohan, M. & Soodan, K. S. (1969). Two new Lutetian species of Rotaliina from the Kutch. Journal of the Palaeontological Society of India. 12: 9-11. gs
Schackoinella tricamerata compiled by the pforams@mikrotax project teamviewed: 27-1-2023
Schackoinella tricamerata Mohan and Soodan 1969 1.jpg
Schackoinella tricamerata Mohan and Soodan 1969 1.jpg
Comments
(0)