A new articulated freshwater fish (Clupeomorpha, Ellimmichthyiformes) from the Horseshoe Canyon Formation, Maastrichtian, of Alberta, CanadaThis article is one of a series of papers published in this Special Issue on the theme Albertosaurus.

2010 ◽  
Vol 47 (9) ◽  
pp. 1183-1196 ◽  
Author(s):  
Michael G. Newbrey ◽  
Alison M. Murray ◽  
Donald B. Brinkman ◽  
Mark V. H. Wilson ◽  
Andrew G. Neuman
Keyword(s):  
North America ◽  
Posterior Margin ◽  
Upper Cretaceous ◽  
New Genus ◽  
Special Issue ◽  
New Genus And Species ◽  
Sensory Canal ◽  
The Family ◽  
Milk River Formation ◽  
Horseshoe Canyon Formation

Horseshoeichthys armaserratus , gen. et sp. nov., (Clupeomorpha: Ellimmichthyiformes: Sorbinichthyidae) is described from the Horseshoe Canyon Formation (Maastrichtian), Albertosaurus bonebed locality, Alberta, Canada. Horseshoeichthys armaserratus is classified as an ellimmichthyiform based on the following characters: the presence of a sixth infraorbital with a sensory canal that leads to the fifth infraorbital, absence of a supraorbital bone, subrectangular predorsal scutes, parietals in contact with each other at the midline, and two supramaxillae. The specimen is classified in the Sorbinichthyidae Family as it has abdominal ribs articulating in pits on the centra, posterior spines on predorsal scutes, and absence of a median spine on predorsal scutes. A new genus and species is proposed based on the presence of (anteriorly) Y-shaped mesethmoid, supraorbital, subrectangular predorsal scutes with coarse, rounded serrae on the posterior margin and a large anterior projection, scales with serrae on the circuli, and two postcleithra. This specimen represents the first freshwater ellimmichthyiform from the Upper Cretaceous of North America and the highest paleolatitude (59°N) occurrence known for the family. Furthermore, the dentary and centra have distinctive morphologies that are matched by specimens in microvertebrate localities from three underlying formations, including the Milk River Formation (Santonian), which indicates at least a 14 million year history for this lineage.

Mammals from the Upper Cretaceous Oldman Formation, Alberta. III. Eutheria

1979 ◽  
Vol 16 (1) ◽  
pp. 114-125 ◽  
Author(s):  
Richard C. Fox
Keyword(s):  
North America ◽  
Upper Cretaceous ◽  
New Genus ◽  
New Genus And Species ◽  
The Family

Eutherian mammals from the Upper Cretaceous Oldman Formation, Alberta, are described. These include the leptictid proteutherian Gypsonictops lewisi Sahni, which has five lower premolars and was probably the direct lineal ancestor of G. hypoconus Simpson of Lancian age; a new genus and species of primitive and generalized erinaceoid insectivore, which is the most adequate dental ancestor known for all Lipotyphla, Tupaiidae, Primates, Dermoptera, Chiroptera, and all of the ungulate mammals; and the first pre-Lancian occurrence in North America of the Family Palaeoryctidae.

The earliest Elcanidae (Insecta, Orthoptera) from the Upper Triassic of North America

2018 ◽  
Vol 92 (6) ◽  
pp. 1028-1034 ◽  
Author(s):  
Yan Fang ◽  
A.D. Muscente ◽  
Sam W. Heads ◽  
Bo Wang ◽  
Shuhai Xiao
Keyword(s):  
North Carolina ◽  
North America ◽  
Posterior Margin ◽  
New Genus ◽  
Upper Triassic ◽  
New Genus And Species ◽  
X Ray ◽  
The North ◽  
The Family ◽  
Branch Formation

AbstractA new genus and species of the Elcanidae (Orthoptera, Elcanoidea), Cascadelcana virginiana n. gen. n. sp., is described based on a forewing specimen from the Upper Triassic (Norian) Cow Branch Formation in the Solite Quarry Lagerstätte near the North Carolina-Virginia boundary, USA. It is distinguished from other elcanid species by its RP+MA1 with six branches, M with two branches before stem MA1 fused with RP, and short CuA almost vertical against the posterior margin. This fossil represents the earliest definitive record of the family Elcanidae and the first orthopteran described from the Triassic of North America. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) analyses show that the veins and a pterostigma-like structure on the wing of C. virginiana n. gen. n. sp. are preserved as carbonaceous compressions. The presence of a pterostigma-like structure in elcanids indicates that they may have evolved a particular flight mechanism distinct from those of other orthopterans.UUID: http://zoobank.org/49526c99-5da4-48e3-ba6e-7018b8f9b1ae

Gigantocharinus szatmaryi, a new trigonotarbid arachnid from the Late Devonian of North America (Chelicerata, Arachnida, Trigonotarbida)

2000 ◽  
Vol 74 (1) ◽  
pp. 25-31 ◽  
Author(s):  
William A. Shear
Keyword(s):  
North America ◽  
Middle Devonian ◽  
New Genus ◽  
Upper Devonian ◽  
Late Carboniferous ◽  
Late Devonian ◽  
New Genus And Species ◽  
Significant Time ◽  
The Family ◽  
Time Gap

A new trigonotarbid arachnid, Gigantocharinus szatmaryi new genus and species, is described from Upper Devonian (Late Famennian) sediments in Pennsylvania. Devonian trigonotarbids were known before from only a single North American locality and several European ones. The new trigonotarbid occurs in what had previously been a significant time gap between the faunas of the Middle Devonian and the late Carboniferous. Gigantocharinus szatmaryi is assigned with some hesitation to the family Palaeocharinidae.

scholarly journals Brittle stars looking like starfish: the first fossil record of the Astrophiuridae and a remarkable case of convergent evolution

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e8008
Author(s):  
Ben Thuy ◽  
Andy Gale ◽  
Lea Numberger-Thuy
Keyword(s):  
Fossil Record ◽  
Upper Cretaceous ◽  
New Genus ◽  
Parallel Evolution ◽  
Molecular Evidence ◽  
New Genus And Species ◽  
Brittle Stars ◽  
Remarkable Case ◽  
The Family ◽  
A New Species

The genus Astrophiura, which ranks among the most extraordinary of modern brittle stars, is the type genus of the recently resurrected family Astrophiuridae within the order Ophiurida. On account of its absurdly enlarged and strongly modified lateral arm plates, Astrophiura bears a closer resemblance to a pentagonal starfish than to a typical ophiuroid. Although molecular evidence suggests an ancient origin of the Astrophiuridae, dating back at least to the Early Jurassic, not a single fossil astrophiurid has been reported so far. Here, we describe dissociated lateral arm plates from the Campanian of Cringleford near Norwich, UK, and the Maastrichtian of Rügen, Germany (both Upper Cretaceous) with unambiguous astrophiurid affinities and assign these to a new species, Astrophiura markbeneckei. This represents the first fossil record of the family. In addition, the Rügen material included lateral arm plates that superficially resemble those of A. markbeneckei sp. nov. but differ in having spine articulations that are typical of the ophionereidoid family Amphilimnidae. We assign these plates to a new genus and species, Astrosombra rammsteinensis, an extinct amphilimnid with morphological modifications similar to those of Astrophiura, and thus representing a remarkable case of parallel evolution amongst brittle stars looking like starfish.

Homeomorphy in the Asteroidea (Echinodermata); a new Late Cretaceous genus and species from Colorado

2002 ◽  
Vol 76 (6) ◽  
pp. 1007-1013 ◽  
Author(s):  
Daniel B. Blake ◽  
Barry S. Kues
Keyword(s):  
Upper Cretaceous ◽  
New Genus ◽  
New Genus And Species ◽  
Limited Evidence ◽  
Morphological Response ◽  
Shallow Marine ◽  
Body Form ◽  
Selective Pressures ◽  
Modern Species ◽  
The Family

Codellaster keepersae new genus and species, from the Upper Cretaceous Codell Sandstone Member of the Carlile Shale of Colorado (U.S.A.), is assigned to the asteroid (Echinodermata) family Goniasteridae. Although clearly a goniasterid, the flattened body form and details of morphology of C. keepersae are remarkably similar to corresponding features of the modern astropectinid Astropecten regalis and also of the luidiid Luidia (Platasterias) latiradiata. The discovery facies of C. keepersae includes low-angle crossbeds and asymmetrical ripple marks that are suggestive of a very shallow marine environment. Both the modern species occur in shallow, turbulent settings, and homeomorphy beween ancient and modern asteroids suggests similar selective pressures and evolutionary responses. Limited evidence suggests goniasterids might have been more common in shallower waters during the Cretaceous than they are today, and absence of modern Codellaster-like goniasterids indicates that the family abandoned these habitats, although the fundamental morphological response to such settings remained viable for asteroid organization.

The centipede family Anopsobiidae new to North America, with the description of a new genus and species and notes on the Henicopidae of North America and the Anopsobiidae of the Northern Hemisphere (Chilopoda, Lithobiomorpha)

Zootaxa ◽  
2018 ◽  
Vol 4422 (2) ◽  
pp. 259 ◽  
Author(s):  
WILLIAM A. SHEAR
Keyword(s):  
North America ◽  
Northern Hemisphere ◽  
New Genus ◽  
New Taxon ◽  
New Genus And Species ◽  
Lava Tubes ◽  
The Family ◽  
North America North

Speleopsobius weaveri, n. gen., n. sp., is described from lava tubes in southern Idaho, USA. The new taxon, and species of the genera Buethobius Chamberlin, 1911 and its probable synonym Yobius Chamberlin, 1945, are members of the family Anopsobiidae, not previously reported from North America. All known species of Henicopidae and Anopsobiidae from North America north of México are listed and briefly noted, along with all known anopsobiids from the northern hemisphere. Anopsobiella dawidoffi Attems, 1938 (Vietnam) is likely not a member of the family Anopsobiidae. 

Ensigeropus, a new genus of the family Platyischnopidae (Amphipoda: Amphilochidea) from Northern Chile

Zootaxa ◽  
2017 ◽  
Vol 4311 (3) ◽  
pp. 399
Author(s):  
JORGE PÉREZ-SCHULTHEISS
Keyword(s):  
Posterior Margin ◽  
New Genus ◽  
New Taxon ◽  
Northern Chile ◽  
New Genus And Species ◽  
Upper Lip ◽  
The North ◽  
Mandibular Molar ◽  
The Family

A new genus and species of Platyischnopidae from the sandy intertidal of two localities in the north of Chile are described. Ensigeropus cachinalito n. gen., n. sp. is similar to Eudevenopus Thomas & Barnard, 1983 in most characters; however, it presents characters hitherto not reported in the family, as the lobate upper lip and the absence of a mandibular molar. The new taxon is easily recognized among all American Platyischnopidae by the presence of a conspicuous tooth on the posterior margin of the basis of pereopod 7, a character present also in species of the Australian genus Tomituka Barnard & Drummond, 1979. 

New caenagnathid (Dinosauria: Theropoda) specimens from the Upper Cretaceous of North America and Asia

1993 ◽  
Vol 30 (10) ◽  
pp. 2255-2272 ◽  
Author(s):  
Philip J. Currie ◽  
Stephen J. Godfrey ◽  
Lev Nessov
Keyword(s):  
North America ◽  
South Dakota ◽  
Upper Cretaceous ◽  
New Genus ◽  
Food Type ◽  
New Genus And Species ◽  
Hell Creek Formation ◽  
Central Asian ◽  
Southern Alberta ◽  
Judith River Formation

New specimens of caenagnathid theropods are described from the Judith River Formation (Campanian) of southern Alberta, the Hell Creek Formation (Maastrichtian) of South Dakota, and the Bissekty Formation (Turonian) of Uzbekistan. With the exception of the Hell Creek specimen, and a vertebra from Alberta, all are from the symphysial regions of the lower jaws. Caenagnathids are rare and poorly known animals, and the described fossils preserve heretofore unknown features, including vascular grooves and foramina in the symphysial region, and the pattern of overlapping sutures between jaw elements. Most of the new specimens are different from the holotype of Caenagnathus collinsi Sternberg and may represent the second described species, Caenagnathus sternbergi. The two jaws from the Bissekty Formation are the first oviraptorosaurian jaws described from Uzbekistan and represent a new genus and species anatomically closer to Caenagnathus than to central Asian forms like Oviraptor, Conchoraptor and Ingenia. There are at least five characters that distinguish caenagnathid and oviraptorid jaws, but it is concluded that the length of the symphysial region must be used with caution. Jaw anatomy supports the idea that oviraptorids were well adapted for eating eggs, although their diet was probably not restricted to one food type.

A new chernetid pseudoscorpion from the Miocene Chiapas – Amber Lagerstätte, Mexico

2014 ◽  
Vol 51 (9) ◽  
pp. 902-908 ◽  
Author(s):  
Francisco Riquelme ◽  
Dulce F. Piedra-Jiménez ◽  
Víctor Córdova-Tabares ◽  
Bibiano Luna-Castro
Keyword(s):  
High Resolution ◽  
North America ◽  
New Genus ◽  
Soft Tissues ◽  
New Genus And Species ◽  
Male Specimen ◽  
Fossil Species ◽  
Reflected Light ◽  
The Family ◽  
High Resolution Microscopy

Mayachernes maatiatus, a new genus and species of pseudoscorpion of the family Chernetidae (Arachnida: Pseudoscorpionida), is described from the Miocene Chiapas – Amber Lagerstätte, south of Mexico. This new fossil species represents an adult male specimen with hard–soft tissues preserved in great detail. It differs from all other living chernetids by a combination of diagnostic characters. Anatomical data were collected using high-resolution microscopy with regular to infrared-reflected light. Mayachernes maatiatus is the first newly described fossil species of pseudoscorpion from the Chiapas amber. This taxon also adds to knowledge of the Chernetidae diversity in the southernmost part of North America at the Neogene.

Additions to the mammalian local fauna from the Upper Milk River Formation (Upper Cretaceous), Alberta

1976 ◽  
Vol 13 (8) ◽  
pp. 1105-1118 ◽  
Author(s):  
Richard C. Fox
Keyword(s):  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
New Genus ◽  
Junior Synonym ◽  
New Genus And Species ◽  
Local Fauna ◽  
Apparent Position ◽  
Relationship Of ◽  
Milk River Formation ◽  
Lower Molar

New mammalian fossils from the Upper Cretaceous Upper Milk River Formation, Alberta, document the occurrence of a possibly new triconodontid species, and of an unnamed therian of metatherian–eutherian grade. The second discovered specimen of the Upper Cretaceous triconodontid Alticonodon lindoei Fox 1969 is described, and Alticondon is classified in a new subfamily. A new genus and species of spalacotheriid symmetrodont represented by lower molars at five positions and apparently not descended from the previously known spalacotheriids Spalacotherium Owen 1854 or Spalacotheroides Patterson 1955 is named and described. A lower molar is referred to the primitive therian of metatherian–eutherian grade Potamotelses aquilensis Fox 1972, The structure, size, and apparent position ([Formula: see text]) of the molar suggest relationship of Potamotelses with the Asiatic Upper Cretaceous Deltatheridiidae and the Lower Cretaceous Aegialodon Kermack, Lees, and Mussett 1965. Kielantherium Dashzeveg 1975 is a junior synonym of Aegialodon.

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