scholarly journals The Late Cretaceous belemnite family Belemnitellidae: Taxonomy and evolutionary history

1997 ◽  
Vol 44 ◽  
pp. 59-88
Author(s):  
W. K. Christensen
Keyword(s):  
Northern Hemisphere ◽  
Late Cretaceous ◽  
North American ◽  
Evolutionary History ◽  
The North ◽  
Northern European ◽  
Nomen Dubium ◽  
The Family

The Late Cretaceous belemnite family Belemnitellidae Pavlow, 1914 occurs only in the Northern Hemisphere and includes nine genera and two subgenera: Praeactinocamax Naidin, 1964b, Actinocamax Miller, 1823, Belemnocamax Crick, 1910, GonioteuthisBayle, lS7S,BelemnellocamaxNaidin, 1964b,Goniocamax Naidin, 1964b, Belemnitella d'Orbigny, 1840, Belemnella (Belemnella) Nowak, 1913, Belemnella (Pachybelemnella) Schulz, 1979, Belemnella (Neobelemnella) Naidin, 1975 and Fusiteuthis Kongiel, 1962. The latter is most likely a nomen dubium. Diagnoses of the genera and subgenera are provided. The origin of the family is poorly known. The number of genera and subgenera, fluctuated during the Late Cretaceous. It was one to two in the Cenomanian, increased gradually to a maximum of six in the Early Santonian, decreased gradually to one during most of the Late Campanian and increased to two or possibly three in the Maastrichtian. The belemnitellids occur in the North European and North American palaeobiogeographical Provinces of the North Temperate Realm, in additon to the northern European margin of the Tethyan Realm. The centre of evolution lay in the North European Province and all known genera and subgenera occur there. Species of five genera and two subgenera occur on the northern European margin of the Tethyan Realm and the majority of these are conspecific with species from the North European Province. Species of essentially two genera occur in the North American Province and these are endemic, with a few exceptions.

scholarly journals Late Turonian-early Coniacian belemnites from western and central Europe

1982 ◽  
Vol 31 ◽  
pp. 63-79
Author(s):  
Walter Kegel Christensen
Keyword(s):  
Central Europe ◽  
Late Cretaceous ◽  
North American ◽  
Evolutionary Trends ◽  
Taxonomic Character ◽  
Central European ◽  
The North ◽  
The Family ◽  
Early Late

A little known fauna of late Turonian--early Coniacian belemnites from the Central European palaeobiogeographic Subprovince is revised and the following species are recognised: Actinocamax strehlensis (Fritsch & Schlonbach), A. bohemicus Stolley, A. paderbornensis Schliiter, and A. esseniensis n. sp. The taxonomic value of various characters within Late Cretaceous belemnites belonging to the family Belemnitellidae Pavlov is discussed, and it is concluded that the shape of the guard is a more significant taxonomic character than the presence of granules. The species from the subprovince are compared to coeval species from the Central Russian Subprovince and the North American Province. The palaeobiogeography and evolutionary trends of early Late Cretaceous belemnites are discussed.

Late Cretaceous gastropods from the Izumi Group of southwest Japan

1990 ◽  
Vol 64 (4) ◽  
pp. 563-578 ◽  
Author(s):  
Tomoki Kase
Keyword(s):  
Late Cretaceous ◽  
North American ◽  
Upper Cretaceous ◽  
Coastal Areas ◽  
Basal Part ◽  
Northwestern Pacific ◽  
New Genera ◽  
Southwest Japan ◽  
The North ◽  
The Family

The basal part of the Upper Cretaceous, mid-Campanian to Maastrichtian Izumi Group of the Izumi Mountains and Awaji Island, Southwest Japan, contains the most diverse gastropod fauna of this age in Japan. This paper discriminates 19 species and describes two new genera: Atira tricarinata n. sp., Ataphrus (s.s.) sp. A, Ataphrus (s.s.) sp. B, Globularia (s.s.) izumiensis n. sp., Lysis izumiensis n. sp., Trichotropis? sp., Deussenia takinoikensis n. sp., Volutilithes antiqua n. sp., Pseudoperissitys bicarinata Nagao and Otatume, Nekewis sp., Nipponitys inouei n. gen. and sp., Nipponitys acutangularis n. gen. and sp., Nipponitys sp. cf. N. magna (Kalishevitsch), Calorebama cretacea n. sp., Taniella japonica n. gen. and sp., Amuletum (s.s.) sp., Biplica osakensis n. sp., Biplica sphaerica n. sp., and Cylichna sp. The family Ampullospiridae is assigned to the suborder Architaenioglossa from the superfamily Naticacea. The enigmatic genus Lysis is tentatively assigned to the Calyptraeidae. Taniella japonica n. sp. is the oldest member of the family Olividae, and Calorebama cretacea n. sp. is the oldest member of the subfamily Pseudolivinae. Occurrence of Atira, Ataphrus, Biplica, and five perissityids further supports close communication of the northwestern Pacific Late Cretaceous gastropod faunas with those of the North American Pacific coastal areas.

LATE CRETACEOUS EXHUMATION OF UNDERPLATED METASEDIMENTARY ROCKS IN THE NORTH AMERICAN CORDILLERA

2019 ◽  
Author(s):  
William A. Matthews ◽  
◽  
Marie-Pier Boivin ◽  
Kirsten Sauer ◽  
Daniel S. Coutts
Keyword(s):  
Late Cretaceous ◽  
North American ◽  
North American Cordillera ◽  
Metasedimentary Rocks ◽  
The North

THE NORTH AMERICAN SPECIES OF MASSALONGIA AND GENERIC RELATIONSHIPS

1963 ◽  
Vol 41 (9) ◽  
pp. 1331-1346 ◽  
Author(s):  
Aino Henssen
Keyword(s):  
North American ◽  
Systematic Position ◽  
North American Species ◽  
New Combination ◽  
General Survey ◽  
The North ◽  
The Family ◽  
Generic Relationships

The systematic position of the genus Massalongia and the closely related genera Koerberia, Vestergrenopsis, and Placynthium in the family Peltigeraceae including lichens with hemiangiocarpic apothecia is discussed. The ontogeny of a hemiangiocarpic apothecium is described briefly. A key for the determination of the genera is provided.A general survey is given for the morphology and anatomy of the genus Massalongia. The two species, M. carnosa and M. microphylliza, are described in detail. The new combination M. microphylliza is made.

scholarly journals The Fourth International Symposium on Ranaviruses: Summary of North American Herpetological Content and Points of Interest

2020 ◽  
pp. 29
Author(s):  
Lauren Ash ◽  
Rachel Marschang ◽  
Jolianne Rijks ◽  
Amanda Duffus
Keyword(s):  
North America ◽  
International Symposium ◽  
North American ◽  
Fourth International Symposium ◽  
Dna Viruses ◽  
The North ◽  
Double Stranded Dna ◽  
Points Of Interest ◽  
The Family ◽  
Globally Distributed

Ranaviruses are large double stranded DNA viruses from the family Iridoviridae. They are globally distributed and are currently known to affect fish, reptiles and amphibians. In North America, ranaviruses are also widely distributed, and cause frequent morbidity and mortality events in both wild and cultured populations. This is a synopsys of the North American content of the 4th International Symposium on Ranaviruses held in May 2017 in Budapest, Hungary.

A New Gunnel, Pholis clemensi, from the Coast of Western North America

1964 ◽  
Vol 21 (5) ◽  
pp. 933-939 ◽  
Author(s):  
Richard H. Rosenblatt
Keyword(s):  
British Columbia ◽  
New Species ◽  
North America ◽  
North American ◽  
North American Species ◽  
Western North America ◽  
The North ◽  
The Family ◽  
Juan De Fuca ◽  
A New Species

A new species, Pholis clemensi, referred to the family Pholidae, is named and described from 12 specimens taken in southern British Columbia waters and the Strait of Juan de Fuca. Pholis clemensi is compared with other members of the genus, and a key is given to the North American species.

Morphology, anatomy, phylogenetics and distribution of fossil and extant Trochodendraceae in the Northern Hemisphere

2020 ◽  
Author(s):  
Steven R Manchester ◽  
Zlatko Kvaček ◽  
Walter S Judd
Keyword(s):  
Northern Hemisphere ◽  
Late Cretaceous ◽  
Morphological Characters ◽  
Basal Part ◽  
Parsimony Analysis ◽  
Crown Group ◽  
Modern Species ◽  
The Family ◽  
New Material ◽  
Fossil Fruit

Abstract We present the oldest known occurrences of crown-group Trochodendraceae based on new material from the Palaeocene of Wyoming, USA. Two genera are recognized, Trochodendron and Eotrochion gen. nov. The fossil fruit of Trochodendron infernense sp. nov. is represented by a pedicellate, apically dehiscent capsular fruit composed of nine follicle-like units, each bearing a persistent convex style. The basal part is ornamented with numerous raised stamen scars. From the same deposits, Eotrochion is represented by infructescences, fruits and associated leaves. The infructescences are racemes of numerous apically dehiscent capsules, each with c. 14–16 styles, each with an underlying nectary and receptacles lacking stamen scars, but possessing a prominent perianth scar. A phylogenetic assessment of the modern species, plus representatives of four extinct genera of fossil Trochodendraceae based on available morphological characters, yields a favoured topology of Trochodendron(Eotrochion(Concavistylon kvacekii(C. wehrii (Pentacentron, Tetracentron)))). A parsimony analysis of currently available characters indicates that C. wehrii renders Concavistylon non-monophyletic. Accordingly, we transfer it to Paraconcavistylon gen. nov., characterized by pendent, rather than erect infructescences. We also reconsider the extinct Nordenskioeldia (Late Cretaceous to Miocene), the prior placement of which in Trochodendraceae has been challenged, and we consider it to fall outside the crown group of the family.

?Tethyaster albertensis, a Late Cretaceous (Turonian) sea star from the Cardium Formation, Alberta, Canada

1990 ◽  
Vol 64 (6) ◽  
pp. 1045-1049 ◽  
Author(s):  
Russell L. Hall ◽  
Suzan Moore
Keyword(s):  
North America ◽  
Late Cretaceous ◽  
Sea Star ◽  
Sea Stars ◽  
Peace River ◽  
The North ◽  
The Family ◽  
Cardium Formation ◽  
Northern Alberta ◽  
Limited Change

Although many of the surviving lineages of sea stars appeared during an early Mesozoic radiation of the class and have undergone limited change since then, they have left a very poor fossil record, particularly in the Mesozoic of North America (Blake, 1981). This record from the Late Cretaceous of Alberta is made more significant by the fact that it is apparently only the second occurrence of a member of the family Astropectinidae in the Cretaceous of North America; Lophidiaster silentiensis was described by McLearn (1944) from the Lower Cretaceous (Albian) Hasler Formation, from a now-submerged locality on the Peace River in northern Alberta. All previously recorded fossil sea stars from the North American Cretaceous are representatives of the family Goniasteridae.

Larvae of the North American Olethreutidae (Lepidoptera)

1959 ◽  
Vol 91 (S10) ◽  
pp. 5-338 ◽  
Author(s):  
Margaret Rae MacKay
Keyword(s):  
North American ◽  
Fruit Trees ◽  
Individual Species ◽  
The North ◽  
The Family ◽  
Late Instar ◽  
Species Groups ◽  
Relationship Of ◽  
Spruce Needles ◽  
The Relationship

AbstractThe late-instar larvae of about 185 species of the North American Olethreutidae are described and most of them illustrated. Included in these are many pests, such as Grapholitha molesta, Carpocapsa pomonella, and Spilonota ocellana on fruit trees, Paralobesia viteana on grapes, Ancylis comptana fragariae on strawberries, Laspeyresia nigricana in pea pods, Laspeyresia caryana in hickory and pecan nuts, Taniva albolineana in spruce needles, and species of Rhyacionia and Petrova on pines. Keys to species groups and to individual species are provided. Of the diagnostic and specialized characters listed, the most useful include the setae, the spinneret, and the shape of the larva, especially of its head and anal shield. The main characters are given for the postulated ancestral larva and for the highly developed larva. Most of the species groups are arranged according to the suggested phylogenetic relationship of their larvae, emphasizing the necessity of a revision of the family. Larvae of some genera previously difficult to classify, such as Pseudogalleria and Hystricophora, indicate the relationship of those genera to other groups; conversely, lack of relationship is clearly shown in other instances, e.g., between Carpocapsa pomonella and Carpocapsa saltitans, and between the two species Epiblema culminana and E. suffusana and other members of the genus Epiblema.

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