CATALOG OF ORIGINAL DESCRIPTIONS: Pseudogloborotalia lomasha Singh and Kalia 1970

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 -> P -> Pseudogloborotalia -> Pseudogloborotalia lomasha
Other pages this level: P. guatemalensis, P. lomasha, P. pasionensis

Pseudogloborotalia lomasha

Citation: Pseudogloborotalia lomasha Singh and Kalia 1970
Rank: Species
Type locality: About 6 kilometres west of Shri Kolayatji village, near Fuller's earth quarry, Bikaner, Rajasthan, India.
Type age (chronostrat): Discocyclina zone, Bikaner stage, Kirthar series (Lutetian).
Type specimens: holotype No. SFKly/71 and paratype Nos. SFKly/71/1-5.
Type repository: Author's collection (?Lucknow University)

Current identification:


Original Description
Test trochospiral, 2 to 2½ volutions visible on the dorsal side, loosely coiled, loosening of the coil well pronounced in the last whorl; periphery carinate: umbilicoconvex, umbilical side strongly elevated with a fairly deep umbilicus. Sutures on the spiral side fairly distinct, curved and directed backward, septal sutures on the umbilical side incised, radial, directed backward, comparatively less curved than on the spiral side. Chambers angular-conical in shape, about 8 in the final whorl; apertural face distinctly sulcate, the concavity having resulted by the indentation of the Scrobis septalis. Aperture a low interiomarginal arch between the periphery and the marginal shoulder, wall calcareous, bilamellar, radial in microstructure. Surface distinctly cancellate and hispid.

Size:
Holotype No. SFKly/71 max diam; 1.075 mm; min diam 0.75 mm; height 0.5 mm
Paratype No. SFKly/71/1 max diam; 1.115 mm; min diam 0.975 mm; height 0.725 mm
Paratype No. SFKly/71/2 max diam; 1.25 mm; min diam 1.025 mm; height 0.75 mm
Paratype No. SFKly/71/3 max diam; 1.125 mm; min diam 0.825 mm; height 0.55 mm
Paratype No. SFKly/71/4 max diam; 0.925 mm; min diam 0.675 mm; height 0.55 mm
Paratype No. SFKly/71/5 max diam; 0.475 mm; min diam 0.35 mm; height 0.35 mm

Etymology: The Sanskrit adjective lomasha means hairy.

Extra details from original publication
Comparison and remarks: In general shape and outline Pseudogloborotalia lomasha sp. nov. is similar to P. ranikotensis Haque (1956) but differs in having comparatively loose coiling, more distinct sutures on the dorsal side, distinctly cancellate and hispid surface of the test and other characters, particularly in the dimensions and the shape of the dorsal septal sutures. The new species is very common and restricted in the Discocyclina zone.

The systematic position and the validity of the genus Pseudogloborotalia Haque has been doubted by Bolli et al. (1957).

"Haque (1956) also describes Pseudogloborotalia, separating it from Globorotalia mainly on the basis of the smooth and shiny test, whereas he stated that Cushman characterized Globorotalia as having a thick cancellated surface. Cushman (1927) stated that Globorotalia has a wall frequently roughened throughout; but did not state to be cancellated, and the type species G. tumida has a smooth surface. Thus this basis of separation is invalid. Pseudogloborotalia is here questionably placed as a synonym of Globorotalia, and is also questionably considered a planktonic species. Specimens deposited in the U.S. National Museum by Haque closely resemble Globorotalites Brotzen, which is not a planktonic form, but a study of additional and better preserved material will be necessary to definitely place Pseudogloborotalia."

Loeblich and Tappan (1964) in the treatise on Protista have included Pseudogloborotalia Haque under the family Eponididae stating:

"Originally regarded as related to Globorotalia, this genus is here transferred to the Eponididae as it does not appear to be a planktonic form. It is similar to Globorotalites but differs in having radially built wall."

The detailed study of a number of specimens of Pseudogloborotalia lomasha sp. nov. suggests and warrants the transfer of this genus to the superfamily Globigerinacea, particularly on the basis of the distinctly cancellate and hispid nature of the test surface, a feature characteristic of most of the planktonic forms, coupled with the general globorotalid appearance. The validity of the genus is markedly supported by the position of the primary aperture which is different from that of Globorotalia and by the presence of infendibulum.

References:

Bolli, H. M., Loeblich, A. R. & Tappan, H. (1957). Planktonic foraminiferal families Hantkeninidae, Orbulinidae, Globorotaliidae and Globotruncanidae. In, Loeblich, A. R. , Jr., Tappan, H., Beckmann, J. P., Bolli, H. M., Montanaro Gallitelli, E. & Troelsen, J. C. (eds) Studies in Foraminifera. U.S. National Museum Bulletin. 215: 3-50. gs V O

Loeblich, A. R. & Tappan, H. (1964b). Sarcodina, Chiefly "Thecamoebians" and Foraminiferida. In, Moore, R. C. (ed.) Treatise on Invertebrate Paleontology, Protista 2, pt. C. University of Kansas Press, Lawrence 1-900. gs

Singh, S. N. & Kalia, P. (1970). Shastrina—a new heterohelicid genus and new species of Pseudogloborotalia Haque and Chiloguembelina Loeblich and Tappan from Kirthars of Rajasthan, India. Proceedings of the Indian National Science Academy. 36, B: 166-174. gs


logo

Pseudogloborotalia lomasha compiled by the pforams@mikrotax project team viewed: 21-1-2021

Taxon Search:
Advanced Search

Short stable page link: http://mikrotax.org/pforams/index.php?id=132055 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics