Mytiloides hattini n. sp.: a guide fossil for the base of the Turonian in the Western Interior of North America

1991 ◽  
Vol 65 (2) ◽  
pp. 234-241 ◽  
Author(s):  
William P. Elder

Mytiloides hattini, a new species of inoceramid bivalve from the basal Turonian (Upper Cretaceous), is described and its stratigraphic importance discussed. This inoceramid is particularly significant because its first occurrence can be used as a marker for the base of the Turonian in strata that typically contain no ammonites and few other taxa. The lowest occurrence of Mytiloides hattini is characterized by abundant specimens over wide regions of the Western Interior of North America; this species also apparently occurs in the lowest Turonian strata of western Europe. The typical absence of ammonites in this stratigraphic interval potentially makes the first occurrence of Mytiloides hattini an important fossil for regional and intercontinental correlation of the Cenomanian–Turonian boundary.

1973 ◽  
Vol 30 (3) ◽  
pp. 389-394 ◽  
Author(s):  
Ian R. Ball

A new species of marine triclad turbellarian, Sabussowia wilhelmii sp. nov., is described from the Pisquid River, Prince Edward Island, Canada. This represents the first occurrence of the genus and of the subfamily Cercyrinae of the Procerodidae in North America. The genus is discussed and a key to the known species is provided. A detailed discussion of the status of Vortex warreni of Girard and Procerodes warreni of Wilhelmi is given. The identity of the former cannot be ascertained. The latter could be a Sabussowia species, but, in the absence of fully mature material, this question cannot be resolved. Both names are regarded as nomina dubia, and the suppression of the genus Fovia of Girard is recommended.


2001 ◽  
Vol 38 (5) ◽  
pp. 803-812 ◽  
Author(s):  
David S Berman ◽  
Robert R Reisz ◽  
Thomas Martens ◽  
Amy C Henrici

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.


1871 ◽  
Vol 8 (90) ◽  
pp. 540-544 ◽  
Author(s):  
William Carruthers

It is a singular coincidence that in a former communication to this Magazine (Vol. VI., p. 1) I described, among other Coniferous fruits, two from the Gault at Folkestone, the one the cone of a pine, and the other of a Wellingtonia, and that in this communication I propose to describe two hitherto unknown fruits from the same deposit and found at the same locality, belonging also the one to a Wellingtonia and the other to a pine. Although the small pinecone already described (Pinites gracilis) differs in form and in the arrangement of the scales from any known cone, recent or fossil, it is more nearly related to that group of the section Pinea, the members of which are now associated with the Wellingtonias in the west of North America, than with any other member of the great genus Pinus. I, however, hesitated to refer to this interesting fact, because the occurrence of the two cones in the Gault might have been due to their being accidentally brought into the same silt by rivers having widely separated drainage areas. And it is easier to keep back generalizations based on imperfect data, than to suppress them after publication, when in the progress of investigation they are shown to be false. But I have now to describe a second pinecone more closely related to the Californian species of Pinea, and with it a new species of Wellingtonia. These surely point with tolerable certainty to the existence of a Coniferous vegetation on the high lands of the Upper Cretaceous period having a fades similar to that now existing in the mountains on the west of North America, between the thirtieth and fortieth parallels of latitude. No fossil referable to Sequoia has hitherto been found in strata older than the Gault, and here on the first appearance of the genus we find it associated with pines of the same group that now flourish by its side in the New World.


Zootaxa ◽  
2008 ◽  
Vol 1718 (1) ◽  
pp. 36 ◽  
Author(s):  
LARA LOPARDO ◽  
NADINE DUPÉRRÉ ◽  
PIERRE PAQUIN

Mysmena quebecana, a new species of the spider family Mysmenidae is here described. Mysmena quebecana was discovered in a spider bio-inventory survey of the Yamaska National Park (Québec, Canada). We therefore report the first occurrence of the family in this province, as well as the first member of the genus Mysmena for continental North America.


1979 ◽  
Vol 16 (6) ◽  
pp. 1176-1186 ◽  
Author(s):  
William P. Wall ◽  
Peter M. Galton

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.


Phytotaxa ◽  
2020 ◽  
Vol 437 (1) ◽  
pp. 47-50
Author(s):  
ANTOINE GAZAIX ◽  
SHMUEL MAZAR ◽  
SHIR VERED

Species of the genus Lythrum Linnaeus (1753: 446) (Lythraceae) occur in temporary pools and wetlands (Morris, 2007) with about 35 species around the world (Graham, 2007). In the Mediterranean area, there are more than 10 species that mostly occur in temporary pools (Castroviejo Bolibar et al., 1997; Tison et al. 2014). Most of the species are also present in East and Central Asia (Webb, 1968). However, some species are limited to Europe, mostly Western Europe, e.g. L. flexuosum Lagasca (1816: 16) and L. baeticum González-Albo (1936: 141) (Castroviejo Bolibar et al., 1997), some are limited to West Asia, e.g. L. silenoides Boissier & Noë (in Boissier 1856: 55) (Ghazanfar, 2016), while Lythrum salicaria Linnaeus (1753: 446), the loosestrife, is widely distributed in Asia, Europe, Africa, Oceania and introduced in North America.


2020 ◽  
Vol 40 (3) ◽  
pp. 269-276
Author(s):  
Rodney M Feldmann ◽  
Carrie E Schweitzer ◽  
James W Haggart

Abstract The description of a new species of an erymid lobster, Stenodactylina beardi, from the Upper Cretaceous Haslam Formation of the Nanaimo Group on Vancouver Island, British Columbia, Canada, brings to fifteen the number of Erymidae in North America. The species are arrayed within five genera based upon configuration of carapace groove morphology, resulting in two new combinations, Stenodactylina bordenensis (Copeland, 1960) and S. foersteri (Feldmann, 1979). The new species exhibits for the first time a male pleopod and accessory structures within Erymoidea. We also provide a list of the North American species of Erymoidea.


1994 ◽  
Vol 68 (4) ◽  
pp. 846-851 ◽  
Author(s):  
Richard L. Squires ◽  
Robert A. Demetrion

The oligopygoid echinoidHaimea bajasurensisn. sp. is described from middle lower Eocene (”Capay Stage”) shallow-marine sandstones in the middle part of the Bateque Formation and shallow-marine limestones in the upper part of the Tepetate Formation, Baja California Sur, Mexico. The new species is both the earliest and the westernmost oligopygoid, and the first occurrence ofHaimeain North America.


2011 ◽  
Vol 149 (4) ◽  
pp. 662-674 ◽  
Author(s):  
MÁRTON RABI ◽  
HAIYAN TONG ◽  
GÁBOR BOTFALVAI

AbstractThe continental deposits of the Upper Cretaceous (Santonian) Csehbánya Formation of the Bakony Mountains in Hungary yielded abundant remains of a bothremydid side-necked turtle, which are attributed to a new species of the genus Foxemys, Foxemys trabanti. F. trabanti shows strong affinities with the European monophyletic group Foxemydina owing to the absence of pits in the upper and lower triturating surfaces, the exclusion of the jugal from the triturating surface, the separation of the Eustachian tube and the stapes by a narrow fissure, the presence of deep and narrow fossa pterygoidei, the partially closed foramen jugulare posterius and the pentagonal shape of the basisphenoid in ventral view. Among the Foxemydina the bothremydid from Iharkút is more closely related to F. mechinorum than to Polysternon provinciale from the Early Campanian of France, mainly because of the position of the occipital condyle relative to the mandibular condyles of the quadrate. The new remains represent the only record of the Foxemydina outside of Western Europe and provide the earliest known occurrence of this endemic, freshwater group in the former Mediterranean Basin. The historical biogeography of the tribe Bothremydini is investigated and a hypothesis of migration from Africa to North America via the high-latitude Thulean route is put forward.


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