The first record of the mosasaur Hainosaurus (Reptilia: Lacertilia) from North America

1988 ◽  
Vol 25 (10) ◽  
pp. 1564-1570 ◽  
Author(s):  
Elizabeth L. Nicholls
Keyword(s):  
New Species ◽  
North America ◽  
Late Cretaceous ◽  
First Record ◽  
Range Extension ◽  
Pierre Shale ◽  
A New Species ◽  
Stratigraphic Range

Hainosaurus pembinensis, a new species of tylosaurine mosasaur, is described from the Pembina Member of the Pierre Shale (Campanian, Late Cretaceous) of Manitoba. Hainosaurus differs from Tylosaurus in having a larger number of vertebrae anterior to the chevron-bearing caudals, a greater length of the femur relative to the humerus, and a greater length of the external nares. Hainosaurus pembinensis is distinguished from other species of this genus by its long supratemporal fenestra and homodont dentition. This is the first record of Hainosaurus from North America and represents both a geographic and stratigraphic range extension for the genus.

New findings of the ammonite Rhaeboceras, including a new species, from the Pierre Shale of eastern Montana

1998 ◽  
Vol 72 (3) ◽  
pp. 473-476 ◽  
Author(s):  
Joyce C. Grier ◽  
James W. Grier
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Small Form ◽  
Pierre Shale ◽  
New Findings ◽  
Stratigraphic Ranges ◽  
A New Species ◽  
Stratigraphic Range

A third known specimen of the ammonite Rhaeboceras burkholderi Cobban, 1987, has been discovered in the upper part of the Pierre Shale of early Maastrichtian age (Late Cretaceous) Baculites eliasi zone of Dawson County, Montana. This finding extends both the geographical and stratigraphic ranges of the species. In addition, R. cedarense new species is described from the Baculites baculus/grandis zone of the same region, which extends the stratigraphic range of the genus as currently recognized. The new species is a small form of Rhaeboceras that appears to be closely related to and probably descended from R. burkholderi.

A new homolid crab, Zygastrocarcinus tricki sp. nov., from the Pierre Shale (middle Campanian), Baculite Mesa, Pueblo County, Colorado, USA

2016 ◽  
Vol 66 (4) ◽  
pp. 709-713
Author(s):  
Torrey Nyborg ◽  
Malcolm Bedell ◽  
Alessandro Garassino ◽  
Neal L. Larson ◽  
Gale A. Bishop
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Geographical Range ◽  
Pierre Shale ◽  
Geological Age ◽  
Shale Formation ◽  
A New Species

Abstract A new species of homolid crab, Zygastrocarcinus tricki sp. nov., is reported from the Late Cretaceous (middle Campanian, Baculites scotti Zone) of the Pierre Shale Formation (Baculite Mesa, Pueblo County, Colorado). This nearly complete homolid, hereto described is the sixth species assigned to the genus and extends our knowledge along with the geographical range and geological age of this taxon.

scholarly journals Late Cretaceous dwarf decapods from Guerrero, southern Mexico and their migration patterns

2006 ◽  
Vol 75 (03-04) ◽  
pp. 121-132 ◽  
Author(s):  
René H.B. Fraaije ◽  
Francisco J. Vega ◽  
Barry W.M. van Bakel ◽  
Luis M. Garibay-Romero
Keyword(s):  
New Species ◽  
North America ◽  
Late Cretaceous ◽  
West Coast ◽  
First Record ◽  
The West ◽  
Southern Mexico ◽  
Migration Patterns ◽  
Migratory Routes ◽  
Migratory Route

Two new brachyuran species are described for the Upper Cretaceous Mexcala Formation, Guerrero State, Mexico. Longusorbis quadratus new species (Coniacian, Temalac region) is the oldest and southernmost record for the genus. Xanthosia zoquiapensis new species (Campanian, Zoquiapa region) is the first record for the genus in Mexico. In addition, the age for Costacopluma bishopi Vega and Feldmann is discussed (Coniacian, Temalac region) and represents the oldest and southernmost record for Cretaceous representatives of this genus in North America. All specimens are considerably smaller compared to other species of the same genera and are interpreted as the first example of brachyuran dwarfism in the geological record. These species add new insight into possible migratory routes during the Late Cretaceous. Within Longusorbis, a northwestern migratory route is documented from the Coniacian in Mexico to the Campanian - Maastrichtian of the west coast of North America (Canada), whereas within the genus Xanthosia, a western migratory route from the Albian of Europe to the Campanian of Mexico is indicated. Costacopluma migrated east and north to the west coast of Africa, southeast North America and Greenland.

Chloromyxum pristiophori, a New Species of Myxosporidia Parasitic in the Gall-Bladder of Pristiophorus cirratus (Saw-Shark)

Parasitology ◽  
1936 ◽  
Vol 28 (1) ◽  
pp. 72-78 ◽  
Author(s):  
Violet Woolcock
Keyword(s):  
New Species ◽  
North America ◽  
Gall Bladder ◽  
First Record ◽  
First Report ◽  
The Subject ◽  
A New Species

Within recent years a considerable amount of work has been done on the Myxosporidia, especially, as pointed out by Kudo (1919), in North America, Asia, and to a lesser degree in Japan (Fugita, 1912, 1913, 1925). Few investigations, however, have been carried out in Australia, and consequently very little is known concerning the distribution of the group in this country. There appear to be as yet only two contributions to the subject, papers by T. Harvey Johnston and M. J. Bancroft (1918, 1919). As far as can be ascertained, my paper is the first report concerning Myxosporidia from fishes of Southern Australian waters, and contains the first record of a species of Chloromyxum from Australia.

A new species of late Cretaceous crab (Brachyura: Carcineretidae) from Albion Island, Belize

1997 ◽  
Vol 71 (4) ◽  
pp. 615-620 ◽  
Author(s):  
Francisco J. Vega ◽  
Rodney M. Feldmann ◽  
Adriana C. Ocampo ◽  
Kevin O. Pope
Keyword(s):  
New Species ◽  
Late Cretaceous ◽  
Upper Cretaceous ◽  
The Other ◽  
Congeneric Species ◽  
Lower Maastrichtian ◽  
Chicxulub Impact ◽  
A New Species ◽  
Stratigraphic Range ◽  
Barton Creek

A new species of carcineretid crab, Carcineretesplanetarius, is described from the Upper Cretaceous (lower Maastrichtian) Barton Creek Dolomite at Albion Island, Belize. The age is based on the stratigraphic range of associated nerineid gastropods and correlation with nannoplankton, benthic foraminifera, and the other known congeneric species of crab found in Jamaica. Confirmation of this age aids in constraining the timing of ejecta deposits of the Chicxulub impact found at the top of Barton Creek Dolomite exposed on Albion Island. Paleoenvironmental and paleoecological analyses suggest that these crabs were swimmers in lagoonal settings, capable of burrowing a few centimeters into the mud for protection.

Zingiberopsis, a fossil genus of the ginger family from Late Cretaceous to early Eocene sediments of Western Interior North America

1978 ◽  
Vol 56 (9) ◽  
pp. 1136-1152 ◽  
Author(s):  
Leo J. Hickey ◽  
Rayma Kempinsky Peterson
Keyword(s):  
New Species ◽  
North America ◽  
Late Cretaceous ◽  
New Combination ◽  
Early Eocene ◽  
Clear Trend ◽  
Late Paleocene ◽  
Fossil Genus ◽  
A New Species

Zingiberopsis attenuata Hickey and Peterson is a new species of monocotyledon from the Paleocene Paskapoo Formation of Alberta. Leaves of this species with their parallel veins grouped into three size sets are intermediate between the Late Cretaceous Zingiberopsis magnifolia (Knowlton) Hickey, new combination, with four discrete sets and Zingiberopsis isonervosa Hickey, of late Paleocene and early Eocene age, with only one set. Zingiberopsis has large, elliptic to ovate leaves with a costa composed of a number of concurrent strands, a set of parallel veins emerging at low angles from the costa, and relatively distantly spaced transverse veins running between adjacent parallel veins. Morphology of the genus matches that of Alpinia in the Zingiberaceae except for greater irregularity of the parallel vein set at and near their origin on the costa and the lack of any evidence of a ligule on the petiole as in Alpinia. Species of Zingiberopsis demonstrate a clear trend toward loss of the wider parallel vein subsets over the approximately 20-million-year range of the genus. In addition, the overlooked character of the arrangement of the parallel vein subsets across the width of the leaf may have potential in the taxonomic determination of monocotyledonous leaves.

A NEW SPECIES OF TRICHOTHAUMALEA (DIPTERA: THAUMALEIDAE) FROM EASTERN NORTH AMERICA AND A DISCUSSION OF MALE GENITALIC HOMOLOGIES

1992 ◽  
Vol 124 (3) ◽  
pp. 491-499 ◽  
Author(s):  
Bradley J. Sinclair
Keyword(s):  
New Species ◽  
North America ◽  
Reproductive System ◽  
First Record ◽  
Instar Larva ◽  
Male Reproductive System ◽  
Eastern North America ◽  
Immature Stages ◽  
Phylogenetic Implications ◽  
A New Species

AbstractThe adult, pupa, and final-instar larva of Trichothaumalea elakalensis sp.nov. (Diptera: Thaumaleidae) are described and illustrated. This is the first record of this genus from eastern North America and first description of the immature stages. In addition, reinterpretation of the homologies of the male terminalia and preliminary observations on the male reproductive system of Thaumaleidae are presented and the phylogenetic implications upon the monophyly of the Chironomoidea are discussed.

A new species of Dimetrodon (Synapsida: Sphenacodontidae) from the Lower Permian of Germany records first occurrence of genus outside of North America

2001 ◽  
Vol 38 (5) ◽  
pp. 803-812 ◽  
Author(s):  
David S Berman ◽  
Robert R Reisz ◽  
Thomas Martens ◽  
Amy C Henrici
Keyword(s):  
New Species ◽  
North America ◽  
Vertebral Column ◽  
First Record ◽  
Lower Permian ◽  
Early Permian ◽  
Terrestrial Vertebrates ◽  
First Occurrence ◽  
Large Predators ◽  
A New Species

A new species of the sphenacodontid synapsid Dimetrodon, D. teutonis, is described on the basis of a single, adult specimen consisting of a large portion of the presacral vertebral column. The holotype was collected from the Lower Permian Tambach Formation, lowermost formational unit of the Upper Rotliegend, of the Bromacker quarry locality in the midregion of the Thuringian Forest near Gotha, central Germany. This is the first record of the genus outside of North America and, therefore, provides not only additional biological evidence of a continuous Euramerican landmass during the Early Permian, but also the absence of any major physical or biological barrier to faunal interchange of terrestrial vertebrates. An estimated weight of 14 kg for D. teutonis is half that of the smallest, previously recognized species, D. natalis. Sphenacodontid phylogeny indicates that the diminutive size of D. teutonis represents an autapomorphy and is in general accord with the absence of large-sized, basal synapsid predators at this truly terrestrial upland locality. It is speculated that the diminutive size of D. teutonis was probably an adaptation to a truly terrestrial, relatively uplands existence like that represented by the Bromacker locality. Here it subsisted on small vertebrates (and possibly large invertebrates) of the Bromacker assemblage, in which the dominant members in both size and abundance were herbivorous diadectids, and it was unlikely to encounter large predators.

Teudopsis cadominensis, a new teuthid squid from the Toarcian (Lower Jurassic) of Alberta

1989 ◽  
Vol 63 (3) ◽  
pp. 324-327 ◽  
Author(s):  
Russell L. Hall ◽  
Andrew G. Neuman
Keyword(s):  
New Species ◽  
North America ◽  
First Record ◽  
Lower Jurassic ◽  
Poker Chip ◽  
The Family ◽  
A New Species

A new species of teuthid squid, Teudopsis cadominensis, is described from the Toarcian (Lower Jurassic) Poker Chip Shale of the Fernie Formation in central-western Alberta. Fossil squids are rare in the Mesozoic of North America; this species is the first record of the family Palaeololiginidae in North America and the first member of the suborder Mesoteuthina in the Jurassic of North America.

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