Catalog - Globotruncana pessagnoi Catalog - Globotruncana pessagnoi

CATALOG OF ORIGINAL DESCRIPTIONS: Globotruncana pessagnoi Longoria 1973

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 -> Globotruncana -> Globotruncana pessagnoi
Other pages this level: << < G. lugeoni, G. lugeoni angulata, G. lunaris, G. marginata austinensis, G. marianosi, G. mariei, G. mayaroensis, G. mexicana, G. monmouthensis, G. morozovae, G. nakkadyi, G. naqibi, G. navarroensis, G. neotricarinata, G. orientalis, G. pessagnoi, G. postrugosa, G. poststephensoni, G. pozaryskae, G. pseudoconica, G. pseudofornicata, G. pura, G. pustulifera, G. putahensis, G. qabeliatensis, G. quadrata, G. renzi, G. repanda, G. riojai, G. roddai, G. rosetta insignis> >>

Globotruncana pessagnoi

Citation: Globotruncana pessagnoi Longoria 1973
Taxonomic rank: species
Type specimens: 237348
Type sample (& lithostrat): Taylor Formation; " Upper Taylor" Clay Member
Type age (chronostrat): Maastrichtian
Type locality: From an east-flowing gully just east of Andreus Road, about 2 miles south of its intersection with Slate Rock Road, 2.7 miles east of Bristol, Dallas County, TX. This locality corresponds with locality "D-9" in the guide book of the First Inter- american Micropaleontological Colloquium. Dallas. Texas (1970).
Type repository: Washington; USNM

Linked specimens: USNM-237348 USNM-185034 USNM-237349 USNM-185033

Current identification/main database link: Abathomphalus intermedius (Bolli, 1951)


Original Description

Test small, trochospiral, biconvex; spiral side slightly more convex,consisting of 2-2.5 whorls of chambers which expand gradually in size. 5 chambers in the last whorl, truncated peripherally by a weak double keel or a wide, imperforate peripheral band. Chambers petaloid in shape on spiral side, separated by curved, slightly elevated sutures, which usually are beaded. Chambers subtrapezoidal in shape on umbilical side, separated by straight, radial, depressed sutures. Umbilicus narrow and shallow. Primary aperture interiomarginal, umbilical to slightly umbilical-extraumbilical in position, bordered by a tegillum. Tegillum broken on all specimens observed.

Etymology:
Globotruncana pessagnoi, n. sp., is named in honor of Dr. Emile A. Pessagno, Jr., in recognition of his contribution to the study of Upper Cretaceous Globigerinacea .

Extra details from original publication
Remarks: Although the new species described here is assigned to Globotruncana, it should be pointed out that G. pessagnoi, n. sp., may well belong to the Abathomphalidae. Some of the paratypes show an umbilical-extraumbilical aperture. Eighty-five per cent of the 65 specimens from the type locality have an umbilical aperture. but the remaining 15 per cent show an umbilical-extraumbilical aperture.

The origin of Globotruncana pessagnoi, n. sp., is uncertain. It could have been derived from a Globotruncanella-like ancestor similar to Globotruncanella havanensis (Voorwijk) during the late Campanian, or it could have originated from an Archaeoglobigerina-like ancestor. The former phylogeny seems more likely to be the correct one. G. pessagnoi, n. sp., exhibits radial, depressed sutures on the umbilical side. This is a common characteristic in members of the Abathomphalidae, cf. Globotruncanella havanensis (Voorwijk) and Abathomphalus intermedius (Bolli). On the other hand, in vertical section (text-figure 1) Globotruncana pessagnoi shows great similarity to G. arca (Cushman). Both species have the same keel structure and G. pessagnoi n. sp. is morphologically comparable with the second whorl of G. arca (cf. Pessagno, 1967; pl. 96, figs. 7-8, 17).

Globotruncana pessagnoi, n. sp., is similar to Abathomphalus intermedius (Bolli), from which it differs in the less globular nature of its chambers on both spiral and umbilical sides and by having subtrapezoidal chambers rather than subpetaloidal ones on the umbilical side. It also resembles G. arca (Cushman), from which it can be distinguished by being smaller in size and having subtrapezoidal chambers on the umbilical side.

Range: Uppermost Campanian to lowermost Maestrichtian. Upper part of Globotruncana calcarata Zonule to lower part of Globotruncana lapparenti Zonule.

Occurrence: In Texas Globotruncana pessagnoi, n. sp., is abundant in the " Upper Taylor Marl" of Travis and Limestone Counties. In Mexico it is common in the Mendez Shale. It also has been observed in samples of JOIDES Leg 1, Site 4A, Section 1.

References:

Longoria, J. F. (1973b). Longoria, J. F. (1973b). A New Species of Globotruncana from the Upper Cretaceous of Texas and Mexico. Micropaleontology. 19(1): -. Micropaleontology. 19(1): -. gs


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Globotruncana pessagnoi compiled by the pforams@mikrotax project team viewed: 23-6-2025

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Comments (2)

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Correct ref : original description Longoria, J. F. (1973). A New Species of Globotruncana from the Upper Cretaceous of Texas and Mexico. Micropaleontology. 19(1): 97-100., available online at https://doi.org/10.2307/1484969

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thanks added to our ref list now, Jeremy