Notes on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America, with comments on their status as ornithopods

1979 ◽  
Vol 16 (6) ◽  
pp. 1176-1186 ◽  
Author(s):  
William P. Wall ◽  
Peter M. Galton
Keyword(s):  
United States ◽  
New Species ◽  
North America ◽  
Upper Cretaceous ◽  
New Genus ◽  
First Record ◽  
The United States ◽  
Side Branch ◽  
Conclusive Evidence ◽  
A New Species

Several biologically significant domes of pachycephalosaurid dinosaurs are described and figured. One unusual specimen from the Oldman Formation (Upper Cretaceous) of Alberta is placed into a new genus and another specimen from the same formation is assigned to a new species of Stegoceras. Domes referable to Stegoceras sp. (Judith River and Hell Creek Formations) are the first conclusive evidence of the presence of this genus in the United States. A large dome from the Oldman Formation of Alberta is referred to Pachycephalosaurus; this specimen is the oldest described to date and is the first record of this genus in Canada.Endocranial casts of Yaverlandia bitholus and Stegoceras validus are described along with a discussion of endocranial trends in pachycephalosaurids. The separation between the cerebrum and cerebellum found in Yaverlandia, and typical of ornithopods in general, is lacking in Stegoceras and Pachycephalosaurus. The loss of this separation may be the result of head butting.The family Pachycephalosauridae possesses sufficient ornithopod characters to justify their retention in that suborder. It does, however, represent an aberrant side branch of ornithopod evolution, which can best be visualized taxonomically by placing this family into a separate infraorder within the Ornithopoda.

scholarly journals First record of a nonpaleotropical intejocerid cephalopod from Darriwilian (Middle Ordovician) strata of central Spain

2019 ◽  
Vol 94 (2) ◽  
pp. 273-278
Author(s):  
Björn Kröger ◽  
Juan Carlos Gutiérrez-Marco
Keyword(s):  
United States ◽  
New Species ◽  
New Genus ◽  
First Record ◽  
The United States ◽  
Central Spain ◽  
Middle Ordovician ◽  
A New Species

AbstractThe order Intejocerida is an enigmatic, short-lived cephalopod taxon known previously only from Early–Middle Ordovician beds of Siberia and the United States. Here we report a new genus, Cabaneroceras, and a new species, C. aznari, from Middle Ordovician strata of central Spain. This finding widens the paleogeographic range of the order toward high-paleolatitudinal areas of peri-Gondwana. A curved conch, characteristic for the new genus, was previously unknown from members of the Intejocerida.UUID: http://zoobank.org/21f0a09c-5265-4d29-824b-6b105d36b791

New data on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America

1983 ◽  
Vol 20 (3) ◽  
pp. 462-472 ◽  
Author(s):  
Peter M. Galton ◽  
Hans-Dieter Sues
Keyword(s):  
United States ◽  
North America ◽  
Upper Cretaceous ◽  
New Genus ◽  
Biological Significance ◽  
The United States ◽  
Hell Creek Formation ◽  
Unusual Condition ◽  
Judith River Formation

In this paper several new significant specimens of pachycephalosaurid dinosaurs from Upper Cretaceous strata of Canada and the United States are described and figured. The domes of an unusual pachycephalosaurid from the Judith River Formation (Campanian) of Alberta show a slightly thickened frontal with an ornamentation of bony tubercles; they are referred to a new genus. A new genus of Pachycephalosauridae is described from the Hell Creek Formation (Maestrichtian) of Montana; it has horn-like projections on the squamosal. Sutural fusion between the quadrate and squamosal of Pachycephalosaurus is reported; this is an unusual condition among the Ornithischia. The biological significance of certain cranial features is considered.

First record of the genus Copturomorpha Champion from the United States and a new species from Texas (Coleoptera: Curculionidae: Conoderinae)

Zootaxa ◽  
2011 ◽  
Vol 2763 (1) ◽  
pp. 66 ◽  
Author(s):  
HENRY A. HESPENHEIDE
Keyword(s):  
United States ◽  
New Species ◽  
First Record ◽  
The United States ◽  
South Texas ◽  
Undescribed Species ◽  
Insect Fauna ◽  
A New Species

I was recently sent for determination a series of a species of conoderine weevils collected in south Texas by Ed Riley of Texas A & M University, as part of a survey of the insect fauna of the region funded by the Texas Parks and Wildlife Department. To my surprise, these specimens represent an undescribed species and the first record of the primarily Neotropical genus Copturomorpha Champion in the United States.

A new species of the ptilodontid multituberculate Prochetodon (Mammalia, Allotheria) from the Paleocene Paskapoo Formation of Alberta, Canada

2004 ◽  
Vol 41 (2) ◽  
pp. 237-246 ◽  
Author(s):  
Craig S Scott
Keyword(s):  
United States ◽  
New Species ◽  
North America ◽  
Evolutionary History ◽  
The United States ◽  
Primitive Form ◽  
Late Paleocene ◽  
History Of ◽  
A New Species

A new species of the ptilodontid multituberculate genus Prochetodon (Mammalia, Allotheria) from the Paleocene Paskapoo Formation of Alberta, Canada, is described. Prochetodon speirsae sp. nov. is the oldest discovered species of the genus, extending the temporal range of Prochetodon earlier into the Paleocene. It exhibits a mosaic of primitive and derived dental features suggestive of a position phylogenetically intermediate between Ptilodus and Prochetodon. Newly discovered specimens from the late Paleocene Gao Mine locality are referred tentatively to Prochetodon foxi. The occurrence of a primitive form of Prochetodon in sediments of early Tiffanian age suggests the evolutionary history of the genus is more complex than previously appreciated. Prochetodon joins a number of well-documented, progressive mammalian taxa making their first appearance in the Western Interior of North America at higher latitudes, well before their first known occurrence in the United States, suggesting a possible origin and immigration from currently unsampled habitats.

scholarly journals A new genus and three new species of noctuid moths from western United States of America and Mexico (Lepidoptera, Noctuidae, Noctuinae, Eriopygini)

ZooKeys ◽  
2018 ◽  
Vol 788 ◽  
pp. 183-199 ◽  
Author(s):  
Lars G. Crabo
Keyword(s):  
United States ◽  
New Species ◽  
North America ◽  
United States Of America ◽  
New Genus ◽  
The United States ◽  
Western United States ◽  
Distribution Maps ◽  
Three New Species ◽  
Lepidoptera Noctuidae

The genus Rhabdorthodesgen. n. is described for three previously unnamed noctuid moths from the mountains of south-western United States and Mexico. It is assigned to subfamily Noctuinae, tribe Eriopygini. Rhabdorthodespattersonisp. n. from the United States and Rhabdorthodesdurangosp. n. and Rhabdorthodespetersonisp. n. from Mexico are described. These moths are small, dull gray brown, and lack highly diagnostic wing markings, but are distinctive structurally. The adults and genitalia of both sexes are illustrated and distribution maps are presented. Two species eponyms honor persons who have facilitated the study and enjoyment of moths in North America by creating moth-specific websites.

Arenaeocoris enervatus (Hemiptera: Heteroptera: Reduviidae: Stenopodainae), a new genus and species from the Southeastern United States

Zootaxa ◽  
2012 ◽  
Vol 3478 (1) ◽  
pp. 105-110
Author(s):  
ROBERT L. BLINN
Keyword(s):  
United States ◽  
New Species ◽  
New Genus ◽  
Southeastern United States ◽  
The United States ◽  
New Genus And Species ◽  
A New Species

Arenaeocoris gen. nov., and a new species, A. enervatus sp. nov., is described from southeastern United States. Diagnosticcharacters to distinguish the new genus from related taxa in the United States, illustrations of the species, and a key to the genera for the United States incorporating the new genus, are provided.

New Late Cretaceous gastropods from the Pacific slope of North America

2001 ◽  
Vol 75 (1) ◽  
pp. 46-65 ◽  
Author(s):  
Richard L. Squires ◽  
Louella R. Saul
Keyword(s):  
New Species ◽  
North America ◽  
Upper Cretaceous ◽  
New Genus ◽  
First Record ◽  
Western Hemisphere ◽  
The Pacific ◽  
Valid Taxon ◽  
Pacific Slope ◽  
Three New Species

Two new genera and ten new species of shallow-marine, warm-water gastropods are reported from several Upper Cretaceous formations found between British Columbia and southern California. The buccinid Zaglenum new genus is represented by two new species and the turbinellid Fimbrivasum new genus is represented by three new species. The nododelphinulid Trochacanthus pacificus new species is the first record of this genus in the Western Hemisphere, and the procerthiid Nudivagus? califus new species could be the first record of this genus on the Pacific slope of North America. The xenophorid Xenophora (Endoptygma) hermax new species is only the second known Cretaceous species of this genus on the Pacific slope of North America, and this species establishes that Endoptygma Gabb, 1877, is a valid taxon. The neritid Otostoma sharonae new species is only the fourth known Cretaceous species of this genus on the Pacific slope of North America. The ringiculid Ringicula? (Ringiculopsis?) hesperiae new species is the first Campanian record of this genus on the Pacific slope of North America and the first recognition of this subgenus in this area.

On a new species of Graptocarcinus ROEMER, 1887 (Brachyura, Dynomenidae, Graptocarcininae) from the Upper Cretaceous of southwest Cuba

2020 ◽  
Vol 296 (1) ◽  
pp. 211-216
Author(s):  
Francisco J. Vega ◽  
Carlos Rafael Borges-Sellén ◽  
Javier Aguilar- Pérez ◽  
Alberto F. Arano-Ruiz ◽  
Lázaro W. Viñola-López ◽  
...  
Keyword(s):  
United States ◽  
Czech Republic ◽  
New Species ◽  
Upper Cretaceous ◽  
Decapod Crustacean ◽  
The United States ◽  
The Czech Republic ◽  
Form Part ◽  
Lower Maastrichtian ◽  
A New Species

A new species of Graptocarcinus, G. collinsi Vega, is recorded from lower Maastrichtian (Upper Cretaceous) strata assigned to the Arroyo Grande Formation to the south of Rodas (central Cuba). The three specimens available form part of a diverse decapod crustacean fauna currently under study. The new species differs from its Early and Late Cretaceous congener from Mexico, the United States, England, Spain, France, the Czech Republic and the Netherlands in being much wider than long, having a larger mean carapace size, in lacking or having an extremely weak cervical groove and coarse and densely arranged granules on the dorsal carapace.

Description of a new species of Osmia (Hymenoptera: Megachilidae) from southwestern North America, with a redescription of the enigmatic species Osmia foxi Cameron

Zootaxa ◽  
2010 ◽  
Vol 2512 (1) ◽  
pp. 26
Author(s):  
MOLLY G. RIGHTMYER ◽  
TERRY GRISWOLD
Keyword(s):  
United States ◽  
New Species ◽  
New Mexico ◽  
North America ◽  
The United States ◽  
Cochise County ◽  
Hidalgo County ◽  
A New Species

The Osmia of southwestern North America are not well known. A new species, Osmia (Acanthosmioides) palmula, and the enigmatic Osmia (Melanosmia) foxi Cameron, known only from the male holotype, are described and figured in both sexes, with additional comments on their distribution and biology. A checklist and key to the known Osmia species from Cochise County, Arizona, Hidalgo County, New Mexico, and adjacent counties in the United States are presented.

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

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