Upper Cretaceous Rudist Bivalves from Basinal Highs (Venetian Prealps, Northern Italy)

2007 ◽  
pp. 71-80 ◽  
Author(s):  
ENRICO TREVISANI ◽  
RICCARDO CESTARI
Keyword(s):  
Upper Cretaceous ◽  
Northern Italy ◽  
Rudist Bivalves

TAXONOMY AND PALEOECOLOGY OF RUDIST BIVALVES FROM UPPER CRETACEOUS STRATA, GULF COASTAL PLAIN, USA

2020 ◽  
Author(s):  
Alex Zimmerman ◽  
◽  
Claudia Johnson ◽  
George E. Phillips ◽  
Dana J. Ehret
Keyword(s):  
Coastal Plain ◽  
Upper Cretaceous ◽  
Gulf Coastal Plain ◽  
Rudist Bivalves

A new genus and subfamily of mosasaurs from the Upper Cretaceous of northern Italy

2013 ◽  
Vol 33 (3) ◽  
pp. 599-612 ◽  
Author(s):  
Alessandro Palci ◽  
Michael W. Caldwell ◽  
Cesare A. Papazzoni
Keyword(s):  
Upper Cretaceous ◽  
New Genus ◽  
Northern Italy

scholarly journals The Italian record of the Cretaceous shark, Ptychodus latissimus Agassiz, 1835 (Chondrichthyes; Elasmobranchii)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e10167
Author(s):  
Manuel Amadori ◽  
Jacopo Amalfitano ◽  
Luca Giusberti ◽  
Eliana Fornaciari ◽  
Giorgio Carnevale ◽  
...  
Keyword(s):  
Upper Cretaceous ◽  
Intraspecific Variability ◽  
Single Species ◽  
Northern Italy ◽  
Historical Collections ◽  
First Time ◽  
High Adaptation

Associated and isolated teeth of the extinct elasmobranch Ptychodus latissimus Agassiz, 1835 from the Upper Cretaceous Scaglia Rossa pelagic limestone of northern Italy are described and discussed here in detail for the first time. The dentition of this widely distributed species consists of low-crowned molariform teeth that exhibit marked and strong occlusal ornamentations suitable for crushing hard-shelled prey. The associated tooth sets and isolated teeth analyzed here are heterogeneous in size and crown outline, but unambiguously belong to a single species. Re-examination of this Italian material consisting of ca. 30 specimens mostly coming from historical collections allows for a rigorous assessment of the intraspecific variability of P. latissimus, including the identification of three different tooth “morphotypes” based on their positions within the jaws. The relatively flat crowns and occlusal sharp and thick ridges indicate a high adaptation for crushing hard-shelled prey in P. latissimus indicating that the durophagous adaptations of this species were certainly more pronounced than in all other species of Ptychodus. We hypothesize that P. latissimus was a third-level predator occupying habitats with abundant thick-shelled prey, such as inoceramid bivalves and ammonites.

Rudist bivalves (Hippuritoidea) from the Clifton Limestone (Lower Campanian) of western Jamaica and a reassessment of the genus Vaccinites in the Americas

2021 ◽  
Vol 21 (14) ◽  
pp. 315-341
Author(s):  
Simon F. Mitchell
Keyword(s):  
Upper Cretaceous ◽  
Statistical Techniques ◽  
Evolutionary Lineage ◽  
Primitive Species ◽  
Rudist Bivalves ◽  
Lower Campanian

The lower Campanian (Upper Cretaceous) Clifton Limestone of Jamaica yields three species of hippuritid bivalve: Barrettia ruseae CHUBB, Whitfieldiella luceae sp. nov. and Vaccinites vermunti MAC GILLAVRY, and the plagioptychid: Plagioptychus sp. The hippuritids are described in detail using statistics. Barrettia ruseae is demonstrated to be a more primitive species of Barrettia than B. monilifera WOODWARD or B. multilirata WHITFIELD, and the species Whitfieldiella luceae is shown to be a more primitive species of Whitfieldiella than W. gigas CHUBB. The specimens of Vaccinites from the Clifton Limestone are compared with populations of Vaccinites from elsewhere in the Americas, and five species (probably representing a single evolutionary lineage) are recognized: V. alencasteri sp. nov. (?late Turonian-?Coniacian), V. martini MAC GILLAVRY (probably early to mid Santonian), V. macgillavryi PALMER (probably mid to late Santonian), V. vermunti MAC GILLAVRY (earliest Campanian), and V. temazcali sp. nov. (late early Campanian). The Vaccinites species can be distinguished using statistical techniques. The ages of the Clifton Limestone and the five Vaccinites species are reviewed. This research demonstrates the value of using hippuritids for biostratigraphy in the Upper Cretaceous of the Americas.

TAXONOMY OF RUDIST BIVALVES FROM UPPER CRETACEOUS STRATA, MISSISSIPPI EMBAYMENT, USA

2017 ◽  
Author(s):  
Alexander N. Zimmerman ◽  
◽  
Claudia C. Johnson ◽  
George E. Phillips ◽  
Dana J. Ehret
Keyword(s):  
Upper Cretaceous ◽  
Mississippi Embayment ◽  
Rudist Bivalves

scholarly journals Recognition of massive Upper Cretaceous carbonate bodies as olistoliths using rudist bivalves as internal bedding indicators (Campanian Merfeg Formation, Central Tunisia)

2016 ◽  
Vol 66 ◽  
pp. 177-193 ◽  
Author(s):  
M. Hédi Negra ◽  
Peter W. Skelton ◽  
Eulàlia Gili ◽  
F. Xavier Valldeperas ◽  
Tom Argles
Keyword(s):  
Upper Cretaceous ◽  
Central Tunisia ◽  
Rudist Bivalves
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