Pleistocene grayling, Thymallus, from Yukon, Canada

1969 ◽  
Vol 6 (5) ◽  
pp. 1185-1190 ◽  
Author(s):  
D. E. McAllister ◽  
C. R. Harington
Keyword(s):  
North America ◽  
Yukon Territory ◽  
The Arctic ◽  
Fish Scales ◽  
Arctic Grayling ◽  
Thymallus Arcticus ◽  
Fossil Records ◽  
Pleistocene Deposit

Eleven cycloid fish scales or scale fragments with scalloped anterior margins were obtained from a Pleistocene deposit in the Old Crow area, Yukon Territory. Shells from the same horizon as the scales were radiocarbon dated at 32 400 ± 770 yr B.P. The scales are from the Arctic grayling, Thymallus arcticus, providing the first fossil records of the genus and of the subfamily Thymallinae for North America.

Late Pleistocene fish fossils of Coregonus, Stenodus, Thymallus, Catostomus, Lota, and Cottus from the Old Crow basin, northern Yukon, Canada

1981 ◽  
Vol 18 (11) ◽  
pp. 1740-1754 ◽  
Author(s):  
Stephen L. Cumbaa ◽  
Don E. McAllister ◽  
Richard E. Morlan
Keyword(s):  
North America ◽  
Geographic Variation ◽  
Glacial Refugia ◽  
Yukon Territory ◽  
The Arctic ◽  
Arctic Grayling ◽  
Thymallus Arcticus ◽  
Freshwater Sculpin ◽  
Longnose Sucker ◽  
First Time

Fossils of the broad whitefish, Coregonus nasus; the inconnu, Stenodus leucichthys; the longnose sucker, Catostomus catostomus; and the burbot, Lota lota, are reported for the first time from North America and a freshwater sculpin, Cottus, for the first time from Yukon Territory. The known fossil occurrence of the Arctic grayling, Thymallus arcticus, in North America is extended from 32 000 to about 60 000 years BP. These six fossils represent about one sixth of the present-day Yukon freshwater ichthyofauna of 35 species.These fossils provide a major test for the method of determining glacial refugia based on geographic variation of morphological or protein characters. They confirm that these taxa were present prior to and presumably survived the Wisconsinan glaciation in a Beringian refugium.The occurrence of these fossils, all subarctic or subarctic–boreal species known at present in the same area, does not suggest a paleoenvironment greatly different from the present one.

Flake Tools in the American Arctic: Some Speculations

1964 ◽  
Vol 29 (3) ◽  
pp. 338-344 ◽  
Author(s):  
Edwin N. Wilmsen
Keyword(s):  
North America ◽  
Central Asia ◽  
New World ◽  
Yukon Territory ◽  
River Delta ◽  
The Arctic ◽  
Land Bridge ◽  
Bering Land Bridge

AbstractTwo sites, Kogruk (at the summit of Anaktuvuk Pass, Alaska) and Engigstciak (at the head of the Firth River delta, Yukon Territory, Canada), have recently yielded flake-tool assemblages which show striking resemblances to a Eurasiatic flake-blade tradition based on a Levallois-Mousterian stone-chipping technique, and to the Clovis flake-blade tradition of America which appears to be based on a similar chipping technique. It is suggested that these traditions are historically related and that the Arctic sites provide a possible link between the two. The presence of incipient fluting in Siberia and at Engigstciak may prove significant. Dating is discussed in terms of the ecology and geology of the sites and is correlated with the probable periods of availability of the Bering land bridge. An upland-foothills zone is seen to be essentially continuous from central Asia to central North America. It is suggested that this zone provided the only environmentally compatible link between the two continents, and that it was therefore the most probable route of early hunting peoples into the New World.

Hunger and the Capture of Grayling and Char

1974 ◽  
Vol 31 (12) ◽  
pp. 1945-1948 ◽  
Author(s):  
J. E. Bryan
Keyword(s):  
Sex Ratio ◽  
Salvelinus Alpinus ◽  
Yukon Territory ◽  
Arctic Char ◽  
Remote Areas ◽  
Size Selection ◽  
Arctic Grayling ◽  
Thymallus Arcticus

Arctic grayling, Thymallus arcticus, and Arctic char, Salvelinus alpinus, were collected by angling and seining in remote areas of northern Yukon Territory. Stomach samples were observed to test the hypothesis that fish caught by angling had eaten less food than those caught by seining. The hypothesis was supported by the data for grayling. The data for char were consistent with the hypothesis, but the results were not statistically significant. There was no difference in the sex ratio of fish caught by the two methods. Angling selected larger char than did seining, but there was no evidence of size selection in grayling.

Phaeogalera and Galerina in arctic-subarctic Alaska (U.S.A.) and the Yukon Territory (Canada)

1992 ◽  
Vol 70 (2) ◽  
pp. 414-433 ◽  
Author(s):  
E. Horak ◽  
O. K. Miller Jr.
Keyword(s):  
North America ◽  
Key Words ◽  
Arctic Tundra ◽  
Yukon Territory ◽  
The Arctic ◽  
North Slope ◽  
Wet Meadow ◽  
Alpine Habitats ◽  
Alaskan North Slope ◽  
First Time

Eleven taxa of Galerina and Phaeogalera are described. Galerina leptocystis, Galerina subarctica, and Galerina praticola are reported from arctic North America for the first time. Phaeogalra stagnina is only found in very humid, wet meadow tundra associated with Drepanocladus or Calliergon. Galerina arctica is reported for the first time from Alaska and Canada. One species, Galerina pseudocerina, is found only in arctic alpine habitats in Canada and not in the arctic tundra. Two forms of Galerina pseudomycenopsis represent the most common taxon observed in Alaskan North Slope wet meadow tundra on peat or associated with Calliergon, Drepanocladus, and Sphagnum. Two species, Galerina clavata and Galerina hypnorum, are common cosmopolitan taxa, but only G. clavata is frequently encountered on the Alaskan North Slope. The association of the Galerina taxa with mosses is presented and discussed, as well as their occurrence in microhabitats in wet meadow tundra and among polygons in coastal tundra on the Alaskan North Slope. Key words: Galerina, Phaeogalera, Cortinariaceae, Alaska, Yukon Territory, bryophytes.

Anastrophyllum assimile and Marsupella revoluta, new to the interior of North America

1977 ◽  
Vol 55 (19) ◽  
pp. 2479-2484 ◽  
Author(s):  
Diana G. Horton
Keyword(s):  
British Columbia ◽  
North America ◽  
Northwest Territories ◽  
North American ◽  
Yukon Territory ◽  
The Arctic ◽  
Devon Island ◽  
New Localities ◽  
Central Eastern ◽  
Coastal British Columbia

Anastrophyllum assimile (Mitt.) Steph. and Marsupella revoluta (Nees) Lindb. are reported from the Keele Peak area, central-eastern Yukon Territory, Canada, and M. revoluta is also reported from Devon Island, Northwest Territories, Canada. These new localities extend a pattern of disjunct occurrences throughout the known range of both species, which further support the hypothesis of their relictual status. However, collections of A. assimile from coastal British Columbia and the Alexander Archipelago, Alaska, are indicative of strong oceanic affinities of North American populations of this species. Also, the arctic and alpine localities at which either A. assimile or M. revoluta might be expected to occur in the interior of Alaska and the Yukon are limited in number as both species invariably occur in association with siliceous substrates.

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