The Albian-Cenomanian (Lower Cretaceous-Upper Cretaceous) boundary in Texas and northern Mexico

1986 ◽  
Vol 60 (6) ◽  
pp. 1212-1219 ◽  
Author(s):  
Keith Young
Keyword(s):  
North America ◽  
North Africa ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Northern Mexico

As first designated by Böse, the Albian-Cenomanian (Lower Cretaceous-Upper Cretaceous) boundary in northern Mexico and Texas is selected at the base of the ammonite zone ofPlesioturrilites brazoensis(Römer). This boundary seems to best agree with boundaries selected for North Africa and Europe, but in North America it may not be the optimum boundary for paleontologists working with foraminiferans.

Le groupe des ganopristines

1940 ◽  
Vol S5-X (3-6) ◽  
pp. 127-147 ◽  
Author(s):  
Camille Arambourg
Keyword(s):  
North America ◽  
North Africa ◽  
Upper Cretaceous ◽  
Paris Basin

Abstract Characterizes and classifies the Ganopristinae (including Ctenopristis nougareti n.g. n.sp.), a group of selachian fishes from the upper Cretaceous of Syria, north Africa, the Paris basin, and North America. Possibly some forms occur in the Eocene.

Mammals from the Upper Cretaceous Oldman Formation, Alberta. V. Eodelphis Matthew, and the evolution of the Stagodontidae (Marsupialia)

1981 ◽  
Vol 18 (2) ◽  
pp. 350-365 ◽  
Author(s):  
Richard C. Fox
Keyword(s):  
North America ◽  
Late Cretaceous ◽  
Related Species ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Time Development ◽  
Special Relationship ◽  
Subsequent Increase ◽  
Closely Related Species ◽  
Primitive Species

The Judithian (Late Cretaceous) stagodontid marsupial Eodelphis Matthew is known from two closely related species, E. cutleri and E. browni, which differ in size and proportions of P3 and robustness of the molars. P1 is shown to be two-rooted in both species and not only in E. cutleri, as previously believed. Known upper molars of Eodelphis lack a stylar cusp D, indicating that neither E. cutleri nor E. browni can be a part of the direct (species) ancestry of the later Cretaceous stagodontid Didelphodon. Evolution of the Stagodontidae probably included derivation of an E. cutleri-like radicle having robust premolars and molars from E. browni-like ancestors, present in North America by Aquilan time; development by the Edmontonian of specialized crushing premolars in primitive species of Didelphodon, descended from ancestors that were similar to E. cutleri in size but had a prominent stylar cusp D on the upper molars; and subsequent increase in size leading to Lancian D. vorax and D. padanicus. Contrary to recent speculation, the Stagodontidae have no special relationship to the Lower Cretaceous Pappotheriidae, which are Eutheria.

Aleksiana rasnitsyni gen. et sp. nov. (Diptera, Limoniidae) to honour Alexandr Rasnitsyn

2021 ◽  
Vol 4 (5) ◽  
Author(s):  
WIESŁAW KRZEMIŃSKI ◽  
KATARZYNA KOPEĆ ◽  
AGNIESZKA SOSZYŃSKA-MAJ ◽  
KORNELIA SKIBIŃSKA
Keyword(s):  
North America ◽  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Upper Triassic ◽  
Burmese Amber ◽  
The Family ◽  
The World ◽  
Stratigraphic Range

The family Limoniidae is the most speciose family of the infraorder Tipulomorpha, as well as one of the largest families of nematoceran Diptera. The oldest known representative of Limoniidae is Architipula youngi Krzemiński, 1992 described from the Upper Triassic of North America (ca. 208 Ma) belonging to the subfamily Architipulinae (Krzemiński, 1992). The subfamily Limoniinae (Limoniidae) stratigraphic range extends from the Lower Cretaceous Lebanese amber (Kania et al., 2014) to the present day, and is divided into two tribes, namely Antochini and Limoniini Savchenko (1985). Antochini currently comprise of the following contemporary genera: Antocha Alexander, 1924 (represented by 160 species); Elliptera Schiner, 1863 (represented by 12 species); Orimarga Osten-Sacken, 1869 (represented by 150 species) and Thaumastoptera Mik, 1866 (represented by 11 species). Representatives of this tribe currently occur on all continents except Antarctica, but individual genera are not distributed uniformly throughout the world (Oosterbroek, 2021). Although the family Limoniidae has been known since the Upper Triassic (Krzemińska & Krzemiński, 2003), the oldest representative of the tribe Antochini is only known from the beginning of the Upper Cretaceous from the Burmese amber from Kachin (Podenas & Poinar, 2009) dated to ca. 99 Ma (Shi et al., 2012).

PENNSYLVANIAN-TRIASSIC MAGMATIC FLUX IN NORTHERN MEXICO AS INDICATED BY DETRITAL ZIRCON DATA FROM TRIASSIC-LOWER CRETACEOUS STRATA

2018 ◽  
Author(s):  
Timothy F. Lawton ◽  
◽  
Luigi Solari ◽  
Jorge Enrique Ruiz Urueña ◽  
Carmen M. Tarango Terrazas ◽  
...  
Keyword(s):  
Detrital Zircon ◽  
Lower Cretaceous ◽  
Northern Mexico

Neritoptyx hogansoninew species (Gastropoda, Mollusca) from the Upper Cretaceous Fox Hills Formation on the Dakota Isthmus, western United States

2018 ◽  
Vol 93 (2) ◽  
pp. 278-290
Author(s):  
J. Mark Erickson
Keyword(s):  
Heat Transfer ◽  
United States ◽  
New Species ◽  
North America ◽  
Upper Cretaceous ◽  
Gulf Coast ◽  
Western United States ◽  
Western Interior Seaway ◽  
Decapod Crustaceans ◽  
Upper Maastrichtian

AbstractIn midcontinent North America, the Fox Hills Formation (Upper Cretaceous, upper Maastrichtian) preserves the last marine faunas in the central Western Interior Seaway (WIS).Neritoptyx hogansoninew species, a small littoral snail, exhibited allometric change from smooth to corded ornament and rounded to shouldered shape during growth. Specimens preserve a zig-zag pigment pattern that changes to an axial pattern during growth.Neritoptyx hogansoninew species was preyed on by decapod crustaceans, and spent shells were occupied by pagurid crabs. Dead mollusk shells, particularly those ofCrassostrea subtrigonalis(Evans and Shumard, 1857), provided a hard substrate to which they adhered on the Fox Hills tidal flats. This new neritimorph gastropod establishes a paleogeographic and chronostratigraphic proxy for intertidal conditions on the Dakota Isthmus during the late Maastrichtian. Presence of a neritid extends the marine tropical/temperate boundary in the WIS northward to ~44° late Maastrichtian paleolatitude. Late Maastrichtian closure of the isthmus subsequently altered marine heat transfer by interrupting northward flow of tropical currents from the Gulf Coast by as much as 1 to 1.5 million years before the Cretaceous ended.UUID:http://zoobank.org/3ba56c07-fcca-4925-a2f0-df663fc3a06b

scholarly journals A New Ankylosaurid Dinosaur from the Upper Cretaceous (Kirtlandian) of New Mexico with Implications for Ankylosaurid Diversity in the Upper Cretaceous of Western North America

PLoS ONE ◽  
2014 ◽  
Vol 9 (9) ◽  
pp. e108804 ◽  
Author(s):  
Victoria M. Arbour ◽  
Michael E. Burns ◽  
Robert M. Sullivan ◽  
Spencer G. Lucas ◽  
Amanda K. Cantrell ◽  
...  
Keyword(s):  
New Mexico ◽  
North America ◽  
Upper Cretaceous ◽  
Western North America

Discovery of a new Lower Cretaceous Wealden-type ostracod fauna from the Bouhedma Formation, Central Tunisian Atlas, North Africa

2021 ◽  
pp. 104942
Author(s):  
Manel Chnayna ◽  
Benjamin Sames ◽  
Khaled Trabelsi ◽  
Yassine Houla ◽  
Amine Hanini ◽  
...  
Keyword(s):  
North Africa ◽  
Lower Cretaceous ◽  
Tunisian Atlas

New multituberculate mammal from the Early Cretaceous of eastern North America

2013 ◽  
Vol 50 (3) ◽  
pp. 315-323 ◽  
Author(s):  
Richard L. Cifelli ◽  
Cynthia L. Gordon ◽  
Thomas R. Lipka
Keyword(s):  
North America ◽  
Iberian Peninsula ◽  
Early Cretaceous ◽  
North American ◽  
Lower Cretaceous ◽  
Late Jurassic ◽  
Relative Length ◽  
Central Position ◽  
Eastern North America ◽  
The North

Multituberculates, though among the most commonly encountered mammalian fossils of the Mesozoic, are poorly known from the North American Early Cretaceous, with only one taxon named to date. Herein we describe Argillomys marylandensis, gen. et sp. nov., from the Early Cretaceous of Maryland, based on an isolated M2. Argillomys represents the second mammal known from the Arundel Clay facies of the Patuxent Formation (Lower Cretaceous: Aptian). Though distinctive in its combination of characters (e.g., enamel ornamentation consisting of ribs and grooves only, cusp formula 2:4, presence of distinct cusp on anterobuccal ridge, enlargement of second cusp on buccal row, central position of ultimate cusp in lingual row, great relative length), the broader affinities of Argillomys cannot be established because of non-representation of the antemolar dentition. Based on lack of apomorphies commonly seen among Cimolodonta (e.g., three or more cusps present in buccal row, fusion of cusps in lingual row, cusps strongly pyramidal and separated by narrow grooves), we provisionally regard Argillomys as a multituberculate of “plagiaulacidan” grade. Intriguingly, it is comparable in certain respects to some unnamed Paulchoffatiidae, a family otherwise known from the Late Jurassic – Early Cretaceous of the Iberian Peninsula.

Anatomical, morphometric, and stratigraphic analyses of theropod biodiversity in the Upper Cretaceous (Campanian) Dinosaur Park Formation

2021 ◽  
pp. 1-15
Author(s):  
Thomas M. Cullen ◽  
Lindsay Zanno ◽  
Derek W. Larson ◽  
Erinn Todd ◽  
Philip J. Currie ◽  
...  
Keyword(s):  
High Resolution ◽  
North America ◽  
Fossil Record ◽  
Upper Cretaceous ◽  
Environmental Changes ◽  
Morphometric Analyses ◽  
Variable Distribution ◽  
Taxic Diversity ◽  
Dinosaur Park Formation ◽  
Broad Scale

The Dinosaur Park Formation (DPF) of Alberta, Canada, has produced one of the most diverse dinosaur faunas, with the record favouring large-bodied taxa, in terms of number and completeness of skeletons. Although small theropods are well documented in the assemblage, taxonomic assessments are frequently based on isolated, fragmentary skeletal elements. Here we reassess DPF theropod biodiversity using morphological comparisons, high-resolution biostratigraphy, and morphometric analyses, with a focus on specimens/taxa originally described from isolated material. In addition to clarifying taxic diversity, we test whether DPF theropods preserve faunal zonation/turnover patterns similar to those previously documented for megaherbivores. Frontal bones referred to a therizinosaur (cf. Erlikosaurus), representing among the only skeletal record of the group from the Campanian–Maastrichtian (83–66 Ma) fossil record of North America, plot most closely to troodontids in morphospace, distinct from non-DPF therizinosaurs, a placement supported by a suite of troodontid anatomical frontal characters. Postcranial material referred to cf. Erlikosaurus in North America is also reviewed and found most similar in morphology to caenagnathids, rather than therizinosaurs. Among troodontids, we document considerable morphospace and biostratigraphic overlap between Stenonychosaurus and the recently described Latenivenatrix, as well as a variable distribution of putatively autapomorphic characters, calling the validity of the latter taxon into question. Biostratigraphically, there are no broad-scale patterns of faunal zonation similar to those previously documented in ornithischians from the DPF, with many theropods ranging throughout much of the formation and overlapping extensively, possibly reflecting a lack of sensitivity to environmental changes, or other cryptic ecological or evolutionary factors.

Spilocaea oleaginea. [Distribution map].

1987 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
North Africa ◽  
New South ◽  
Distribution Map ◽  
South Wales ◽  
Olea Europea ◽  
New Distribution

Abstract A new distribution map is provided for Spilocaea oleaginea (Cast.) Hughes. Hosts: Olive (Olea europea). Information is given on the geographical distribution in Africa, Algeria, Egypt, Ethiopia, Libya, Morocco, North Africa, Somalia, South Africa, Tunisia, Asia, China, Iran, Israel, Jordan, Turkey, USSR, Georgia, Australasia & Oceania, Australia, New South Wales, Europe, Cyprus, France, Greece, Italy, Crete, Sicily, Malta, Portugal, Spain, Yugoslavia, North America, USA, California, South America, Argentina, Chile, Ecuador, Peru.

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