Early Devonian eurypterids from the Northwest Territories of Arctic Canada

2000 ◽  
Vol 37 (8) ◽  
pp. 1167-1175 ◽  
Author(s):  
Simon J Braddy ◽  
Jason A Dunlop
Keyword(s):  
Northwest Territories ◽  
Marine Environment ◽  
Plant Material ◽  
Canadian Arctic ◽  
Arctic Canada ◽  
Early Devonian ◽  
Rock Formation

A new eurypterid fauna from the Lower Bear Rock Formation (Early Devonian, Emsian) of Anderson River, in the Northwest Territories of the Canadian Arctic, is described. The material comprises an almost complete specimen and five isolated carapaces of Erieopterus microphthalmus; an incomplete carapace and telson referred to Drepanopterus sp.; and an isolated prosomal appendage of Carcinosoma sp. Associations include actinopterygian, sarcopterygian, and acanthodian fish, as well as lingulids, conchostracans, ostracodes, coprolites, and plant material. A nearshore marine environment is inferred. This assemblage provides the first Canadian record of Drepanopterus and the youngest Canadian occurrences of erieopterid and carcinosomatid eurypterids.

New species of the cyathaspididPoraspis(Agnatha: Heterostraci) from the Late Silurian and Early Devonian of Northwest Territories, Canada

1998 ◽  
Vol 72 (2) ◽  
pp. 360-370 ◽  
Author(s):  
David K. Elliott ◽  
Elizabeth J. Loeffler ◽  
Yuhai Liu
Keyword(s):  
New Species ◽  
Eastern Europe ◽  
Northwest Territories ◽  
Canadian Arctic ◽  
Geographic Range ◽  
Center Of Origin ◽  
Early Devonian

Four new species of cyathaspidid extend the range of the genusPoraspisback into the Late Silurian and indicate that the Canadian arctic was its center of origin.Poraspis heintzaen. sp., P. cracens n. sp.,P. thulesn. sp. andP. parmulan. sp. also increase the known geographic range of the genus which had previously been reported only from the District of Mackenzie (NWT, Canada), Spitsbergen, western and eastern Europe. The identification ofP. sericeafrom the upper member of the Peel Sound Formation substantiates correlation of this interval with thecrouchizone of the Anglo-Welsh Borders, and provides another rare example of a species common to the Canadian arctic and European successions.

Middle Devonian brachiopods from the Bird Fiord Formation, Arctic Canada

2003 ◽  
Vol 77 (2) ◽  
pp. 243-266 ◽  
Author(s):  
Li Rong-Yu ◽  
Brian Jones
Keyword(s):  
New Species ◽  
Middle Devonian ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
The Arctic ◽  
Arctic Canada ◽  
Early Devonian ◽  
Delta Plain ◽  
The Cross

The late Early Devonian to Middle Devonian Bird Fiord Formation, which is up to 900 m thick, is exposed along an extensive outcrop belt from stretches from Ellesmere Island to Bathurst Island in Arctic Canada. This formation, which encompasses sediments that accumulated in sabkha, deltaic, and shelf settings, is divided into six members. The Blubber Point, Baad Fiord, Norwegian Bay, and Cardigan Strait members, which include sediments that formed on an open marine shelf, are characterized by a diverse biota of brachiopods, mollusks, corals, trilobites, and sponges. The Cross Bay and Grise Fiord members, which encompass sediments that formed in a sabkha and delta plain settings, respectively, are generally devoid of fossils.A collection of 47,026 brachiopods, which came from 140 collections made at 34 locations throughout the outcrop belt of the Bird Fiord Formation, contains 22 species of brachiopods that belong to 21 genera. This biota includes six new species: Gypidula mega, Spinatrypa (Isospinatrypa) parva, Desquamatia (Independatrypa) fortis, Nucleospira stelcki, Warrenella grinnellensis, and Cranaena briceae. Four genera (Arcticastrophia Li and Jones, 2002, Borealistrophia Li and Jones, 2002, Grinnellathyris Li and Jones, 2002, and Costacranaena Johnson and Perry, 1976) and 16 species of brachiopods are endemic to the Arctic Canada. Conversely, the fauna also includes European elements such as Nucleospira lens (Schnur), Spinatrypa (Isospinatrypa), and Warrenella. These taxa may indicate that there was some communication between the Canadian Arctic and Europe during Middle Devonian.

An Early Devonian (Emsian) acanthodian from the Bear Rock Formation, Anderson River, Northwest Territories, Canada

2002 ◽  
Vol 39 (10) ◽  
pp. 1457-1465 ◽  
Author(s):  
Stephen L Cumbaa ◽  
Hans-Peter Schultze
Keyword(s):  
Northwest Territories ◽  
New Genus ◽  
Taxonomic Diversity ◽  
New Taxon ◽  
New Genus And Species ◽  
Early Devonian ◽  
Rock Formation ◽  
Nasal Bones ◽  
Size Number ◽  
The Family

A new genus and species of an Early Devonian (Emsian) mesacanthid acanthodiform from outcrops of the Bear Rock Formation along the Anderson River, Northwest Territories, Canada, is described. The new taxon is distinct from other mesacanthid genera and (or) species in having mesiolaterally expanded skull roof plates and paired nasal bones. Mesacanthids have fin-spines that are similar in size, number, position, and proportions. This new genus is the fourth in the family Mesacanthidae. The wider distribution and apparent taxonomic diversity represented by the discovery of the new genus are indications that the latest-surviving and arguably most advanced acanthodian group, the Acanthodiformes, was already well established in the Early Devonian.

Frequency of consumption of foods and beverages by Inuvialuit adults in Northwest Territories, Arctic Canada

2012 ◽  
Vol 63 (7) ◽  
pp. 782-789 ◽  
Author(s):  
Francis Zotor ◽  
Tony Sheehy ◽  
Madalina Lupu ◽  
Fariba Kolahdooz ◽  
Andre Corriveau ◽  
...  
Keyword(s):  
Northwest Territories ◽  
Arctic Canada

scholarly journals Dietary Intake in a Population Undergoing a Rapid Transition in Diet and Lifestyle: The Inuvialuit in the Northwest Territories of Arctic Canada

2009 ◽  
Vol 100 (6) ◽  
pp. 442-448 ◽  
Author(s):  
Sangita Sharma ◽  
Elsie De Roose ◽  
Xia Cao ◽  
Anita Pokiak ◽  
Joel Gittelsohn ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Northwest Territories ◽  
Arctic Canada ◽  
Rapid Transition ◽  
Diet And Lifestyle

Communications facilities and user problems in the Canadian Arctic

Polar Record ◽  
1968 ◽  
Vol 14 (90) ◽  
pp. 305-314
Author(s):  
T. Ringereide
Keyword(s):  
Soviet Union ◽  
Northwest Territories ◽  
Indian Population ◽  
Total Population ◽  
Canadian Arctic ◽  
Yukon Territory ◽  
Land Area ◽  
Northern Boundary ◽  
The Soviet Union ◽  
The World

The total area of Canada (land area and fresh water) is around 10 million sq km, making it the second largest country in the world, second only to the Soviet Union.For various historic and economic reasons Canada's population of 20 million is very largely concentrated in the southern part of the country, with about twothirds of the population living in large urban centres. The heavy broken line on Fig 1 shows the northern boundary of the densely populated portion of Canada. Only 1·5 per cent of Canada's total population, or 300000 people, live north of this frontier, and out of this total only about 38000 live in the Yukon Territory and the Northwest Territories. The Yukon has a population of only twenty seven people per 1000 sq km, and the Northwest Territories of eight people per 1000 sq km. The total Eskimo population in both territories is about 13600 and the total Indian population some 8000.

Early Ordovician to Early Devonian tectonic development of the northern margin of Laurentia, Canadian Arctic Islands

2019 ◽  
Vol 131 (7-8) ◽  
pp. 1075-1094 ◽  
Author(s):  
Keith Dewing ◽  
Thomas Hadlari ◽  
D. Graham Pearson ◽  
William Matthews
Keyword(s):  
Canadian Arctic ◽  
Early Devonian ◽  
Northern Margin ◽  
Early Ordovician ◽  
Tectonic Development

HEXATYLUS MULVEYI N. SP. AND DELADENUS DURUS (COBB, 1922) THORNE, 1941 (NEMATODA: NEOTYLENCHIDAE) FROM THE CANADIAN ARCTIC

1964 ◽  
Vol 42 (4) ◽  
pp. 649-653 ◽  
Author(s):  
V. M. Das
Keyword(s):  
Northwest Territories ◽  
Canadian Arctic ◽  
Ellesmere Island ◽  
Single Line

Hexatylus mulveyi n. sp. and Deladenus durus (Cobb, 1922) Thorne, 1941, collected from soil in the Lake Hazen area of Ellesmere Island, Northwest Territories, are figured and described. H. mulveyi differs from H. viviparus Goodey, 1926 in the shape of the tail, the number of incisures, the single line of oocytes in the ovary, and in the vulva having elevated lips.

scholarly journals Mercury in the marine environment of the Canadian Arctic: Review of recent findings

2015 ◽  
Vol 509-510 ◽  
pp. 67-90 ◽  
Author(s):  
Birgit Braune ◽  
John Chételat ◽  
Marc Amyot ◽  
Tanya Brown ◽  
Meredith Clayden ◽  
...  
Keyword(s):  
Marine Environment ◽  
Canadian Arctic
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