Catalog - Planomalina caseyi Catalog - Planomalina caseyi

CATALOG OF ORIGINAL DESCRIPTIONS: Planomalina caseyi Bolli, Loeblich&Tappan 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.


Higher levels: pf_cat -> P -> Planomalina -> Planomalina caseyi
Other pages this level: P. alvarezi, P. apsidostroba, P. blowi, P. caseyi, P. ehrenbergi, P. maridalensis, P. mauryae, P. mendezensis, P. praebuxtorfi, P. pulchella, P. rowei, P. saundersi, P. yaucoensis

Planomalina caseyi

Citation: Planomalina caseyi Bolli, Loeblich&Tappan 1957
taxonomic rank: Species
Type specimens: Holotype:4869 Paratypes:4870,4871,4872,5396,5395
Type age (chronostrat): Albian
Type locality: Holotype (USNM P4869),figured paratype (USNM P4870) and unfigured paratypes (USNM P4871 and P4872) from the Albian Gault clay, Brick pit of the London Brick Co., Arlesey, England. Collected 1953 by H. T. and A. R. Loeblich,Jr. Unfigured paratypes (USNM P5396) from 5 1/2 feet of section, alternating gray shale and marly limestone, 58 feet above the base of the Duck Creek formation, and 6 1/2 feet below the fucoid-bearing basal limestone of the Fort Worth formation. Lower Cretaceous, Albian, on the west bank of the Red River, in the SW 1/4Sec.22,T.8-S.,R.2E., on the southwest side of Horseshoe Bend, locality HTL-13, Love County, Oklahoma. Collected August 1939 by H. T. and A. R. Loeblich, Jr. Unfigured paratypes (USNM P5395) from the top 6 feet exposed in the excavation for the Denison Dam, alternating thin limes and yellow brown clays of the Duck Creek formation, 45 feet above the base, north of Denison, Grayson County, Texas. This excavation at the site of the dam for Lake Texhoma is now covered and grassed over. Locality HTL-104, collected July,1940 by H. T. and A. R. Loeblich, Jr., sample 462-463.
Type repository: Washington; USNM

Linked specimens: USNM-4869 USNM-4871 USNM-4870 USNM-4872 USNM-5395

Current identification/main database link: Laeviella bentonensis (Morrow, 1934)


Original Description

Test free, planispiral, biumbilicate, involute to partially evolute, lobulate in outline; chambers spherical to ovate 7-9 in the final whorl, early ones closely coiled, later ones with a tendency to become evolute in some specimens, sutures radial, gently curved, moderately depressed, wall calcareous, finely perforate, surface smooth; aperture interiomarginal, a broad low equatorial arch, with lateral extensions reaching back on the umbilical margin of the chamber to the septum at the base of the chamber, the lateral slitlike extensions bordered above by a distinctly upturned lip, the umbilical portions of the apertures of successive chambers remaining open as relict supplementary apertures beneath the lips after later chambers have covered the primary apertures.

Size:
Greatest diameter of holotype 0.31 mm., thickness 0.13 mm. Paratypes range in diameter from 0.18 to 0.39 mm.

Etymology:
The specific name is in honor of Mr. Raymond Casey, Geological Survey of Great Britain, in recognition of his outstanding work on the Lower Cretaceous ammonites and pelecypods and on the stratigraphy of Great Britain.

Extra details from original publication

Planomalina caseyi, new species, differs from Planomalina apsidostroba Loeblich and Tappan in having more globular and inflated chambers, a smooth rather than carinate periphery and depressed rather than limbate, elevated and beaded sutures. Planomalina caseyi is a more primitive form, occuring in somewhat older beds, in the Duck Creek formation of Texas and Oklahoma (mid-Albian) and in the Gault (Albian) of England, whereas the more ornate P. apsidostroba is found in the Weno, Paw Paw, and Main Street formations (upper Albian) of Texas.

It differs from Biglobigerinella barri, new species, in being about one-half as large, in having fewer and more inflated chambers, in lacking the rugose periphery, and in always having a single primary peripheral aperture, with no development of paired apertm-es or paired
chambers.

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


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Planomalina caseyi compiled by the pforams@mikrotax project team viewed: 19-6-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=131959 Go to Archive.is to create a permanent copy of this page - citation notes



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