Identification and morphology of the aecial state of Pucciniastrum sparsum in northwestern Canada

1970 ◽  
Vol 48 (3) ◽  
pp. 433-435
Author(s):  
Y. Hiratsuka
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Picea Glauca ◽  
Yukon Territory ◽  
New Hosts ◽  
First Time

From inoculation experiments and morphological examinations, the aecial state of Pucciniastrum sparsum (Wint.) E. Fisch. (= Thekopsora sparsa (Wint.) Magn.) has been identified for the first time in North America from specimens collected in the Northwest Territories and the Yukon Territory. Picea glauca (Moench) Voss, P. mariana (Mill.) BSP., and P. pungens Engelm. (from inoculation only) are reported as new hosts of this fungus. An expanded description of the spermogonia and aecia of the fungus is given.

The sequence and correlation of Early Ordovician (Arenig) graptolite faunas in the Richardson Trough and Misty Creek Embayment, Yukon Territory and District of Mackenzie, Canada

2006 ◽  
Vol 43 (12) ◽  
pp. 1791-1820 ◽  
Author(s):  
D E Jackson ◽  
A C Lenz
Keyword(s):  
Northwest Territories ◽  
Deep Water ◽  
Yukon Territory ◽  
Early Ordovician ◽  
The Road ◽  
Bedded Chert ◽  
First Occurrence ◽  
Mackenzie Mountains ◽  
First Time

Four graptolite biozones are recorded from the Arenig portion of the Road River Group in the Richardson and Mackenzie mountains in the Yukon and Northwest Territories. In ascending order, these zones are Tetragraptus approximatus, Pendeograptus fruticosus, Didymograptus bifidus, and Parisograptus caduceus australis (new). The Castlemainian stage may be represented by nongraptolitic massive bedded chert. The Arenig–Llanvirn boundary is drawn below the first occurrence of Undulograptus austrodentatus. Fifty-four graptolite taxa are present, and 16 of these species and subspecies are recorded for the first time in this deep-water biotope, namely, Didymograptus? cf. adamantinus, D. asperus, D. dilatans, D. cf. kurcki, D. validus communis, Holmograptus aff. leptograptoides, H. sp. A, Isograptus? sp. nov. A, I. ? dilemma, Keblograptus geminus, Pseudisograptus manubriatus harrisi, Ps. m. koi, Ps. m. janus, Ps. cf. tau, Xiphograptus lofuensis, and Zygograptus cf. abnormis.

A new species and taxonomic notes on northern Nearctic Cerodontha (Icteromyza) (Diptera: Agromyzidae)

2008 ◽  
Vol 140 (5) ◽  
pp. 557-562 ◽  
Author(s):  
Stéphanie Boucher
Keyword(s):  
New Species ◽  
North America ◽  
Yukon Territory ◽  
Palaearctic Species ◽  
Northern Canada ◽  
First Time ◽  
A New Species

AbstractCerodontha (Icteromyza) pilosan. sp. is described from the Yukon Territory. The Palaearctic species C. (I.) lineella (Zetterstedt) is recorded for the first time in North America, based on specimens from northern Canada and Alaska, and C. (I.) pollinosa (Melander) is synonymized with C. lineella. Cerodontha pilosa is most similar to C. (I.) longipennis (Loew) and C. (I.) lineella. Distinguishing characters and a modification of Spencer’s key to Canadian species of Cerodontha are given to separate these species.

CrypticOnchocercaspecies infecting North American cervids, with implications for the evolutionary history of host associations inOnchocerca

Parasitology ◽  
2012 ◽  
Vol 140 (10) ◽  
pp. 1201-1210 ◽  
Author(s):  
QUINN S. McFREDERICK ◽  
TAMARA S. HASELKORN ◽  
GUILHERME G. VEROCAI ◽  
JOHN JAENIKE
Keyword(s):  
New York ◽  
North America ◽  
Northwest Territories ◽  
Dna Sequence ◽  
Evolutionary History ◽  
Upstate New York ◽  
Zoonotic Infections ◽  
Limited Sampling ◽  
History Of ◽  
New Hosts

SUMMARYParasites in the genusOnchocercainfect humans, ruminants, camels, horses, suids, and canids, with effects ranging from relatively benign to debilitating. In North America,Onchocerca cervipedisis the sole species known to infect cervids, while at least 5Onchocercaspecies infect Eurasian cervids. In this study, we report the discovery of a cervid-parasitizingOnchocercaonly distantly related toO. cervipedis. To reconstruct the phylogenetic history of the genusOnchocerca, we used newly acquired DNA sequence fromO. cervipedis(from moose in Northwest Territories, Canada) and from the newly discovered species (from white-tailed deer in upstate New York), as well as previously published sequences. Ancestral host reconstructions suggest that host switches have been common throughout the evolutionary history ofOnchocerca, and that bovid- and cervid-parasitizing species have been particularly important sources of descendant species. North America cervids might therefore serve as a source forOnchocercainvasions into new hosts. Given the high density of deer populations, the potential for zoonotic infections may also exist. Our discovery of a newOnchocercaspecies with relatively limited sampling suggests that the diversity ofOnchocercaassociated with cervids in North America may be greater than previously thought, and surveys utilizing molecules and morphology are necessary.

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.

Lichens from the area drained by the Peel and Mackenzie rivers, Yukon and Northwest Territories, Canada. II. Microlichens

1981 ◽  
Vol 59 (7) ◽  
pp. 1231-1252 ◽  
Author(s):  
Charles D. Bird ◽  
John W. Thomson ◽  
Alfred H. Marsh ◽  
George W. Scotter ◽  
Pak Yau Wong
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Coniferous Forest ◽  
Yukon Territory ◽  
New Combinations ◽  
Major Tributary ◽  
Made In ◽  
Mackenzie River

A sequel to earlier papers on bryophytes and macrolichens, this treatment describes the distribution and general ecology of 314 microlichen taxa for 230 000 km2 of coniferous forest, open fens, and alpine terrain along the Mackenzie River in the District of Mackenzie, Northwest Territories, and the Peel River, a major tributary which extends into the Yukon Territory. There are 103 new reports for the District of Mackenzie and 69 for the Yukon. Of the taxa, 87% are found in Europe and Asia as well as in North America, 1% are known only from Asia and North America; and 9% are restricted to North America. Staurothele sessilis Magn. is new to Canada, while Sagiolechia protuberans (Ach.) Mass., Staurothele hymenogonia (Nyl.) Th.Fr., and two lichen parasites, Didymosphaeria epicrassa (Oliv.) Vouax and Lahmia fuistingii Körb. are new to North America.Seven new combinations are made in Aspicilia: A. aliena (Zahlbr.) Thoms., A. anseris (Lynge) Thoms., A. elevata (Lynge) Thoms., A. perradiata (Nyl.) Thoms., A. ryrkaipiae (Magn.) Thoms., A. sorediza (Lynge) Thoms., and A. subplicigera (Magn.) Thoms.

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.

Parelaphostrongylus andersoni (Nematoda: Protostrongylidae) in caribou (Rangifer tarandus) of northern and central Canada

1989 ◽  
Vol 67 (8) ◽  
pp. 1966-1975 ◽  
Author(s):  
Murray W. Lankester ◽  
P. Lynn Hauta
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Rangifer Tarandus ◽  
Geographic Range ◽  
Neurologic Disease ◽  
Rangifer Tarandus Caribou ◽  
Central Canada ◽  
Size And Morphology ◽  
First Time ◽  
Improved Methods

Woodland (Rangifer tarandus caribou) and barren ground (R. t. groenlandicum) caribou are reported for the first time as hosts of Parelaphostrongylus andersoni, greatly extending the known geographic range of this muscle nematode. Up to 56% of caribou in the Beverly herd, central Northwest Territories, passed dorsal-spined first-stage larvae in their feces. Animals less than 3 years old were more frequently infected and passed greater numbers of larvae than older animals. Larval output in winter and spring did not differ. Adults of the four elaphostrongyline nematodes known to occur in caribou are distinguished by their location in the host, the size of the worms, and the size and morphology of the male copulatory structures. There is an urgent need for tested and improved methods of differentiating larvae of P. andersoni and other elaphostrongyline nematodes from those of P. tenuis that cause neurologic disease in various North American cervids. Demonstration of the occurrence of P. andersoni in Rangifer sp. in North America raises the possibility that it originated in Eurasian cervids and may still occur in the Old World.

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.

The first record of Leptodontium flexifolium (Pottiaceae, Bryophyta) for Arctic Alaska

2011 ◽  
Vol 45 ◽  
pp. 267-275 ◽  
Author(s):  
O. M. Afonina
Keyword(s):  
North Carolina ◽  
North America ◽  
First Record ◽  
Yukon Territory ◽  
The Arctic ◽  
Southern States ◽  
Arctic Alaska ◽  
First Time ◽  
The City ◽  
World Distribution

Leptodontium flexifolium (Dicks.) Hampe is reported for the first time from the Arctic Alaska, vicinity of the City of Nome (64°31′ N, 165°29′ W). The species is rare for North America and belongs to the genus with tropical and subtropical distribution. Earlier the species was known in North America from the southern states (Arizona, New Mexico, North Carolina, Texas) as well as from 60 000-years-old subfossils from the arctic part of the Yukon Territory (Arctic Canada). The description and illustration of this species based on the specimen from Alaska is given, the world distribution is considered.

Lichens from the area drained by the Peel and Mackenzie rivers, Yukon and Northwest Territories, Canada. I. Macrolichens

1980 ◽  
Vol 58 (18) ◽  
pp. 1947-1985 ◽  
Author(s):  
Charles D. Bird ◽  
John W. Thomson ◽  
Alfred H. Marsh ◽  
George W. Scotter ◽  
Pak Yau Wong
Keyword(s):  
North America ◽  
Northwest Territories ◽  
Plant Communities ◽  
Coniferous Forest ◽  
Yukon Territory ◽  
High Mountains ◽  
The North ◽  
Major Tributary ◽  
Mackenzie River

The distribution and general ecology of 249 macrolichen taxa is described for 230 000 km2 of coniferous forest, open fens, and alpine terrain along the Mackenzie River in the District of Mackenzie, Northwest Territories, and the Peel River, a major tributary which rises in the Yukon Territory. Permafrost plays a major role in determining the plant communities that are present. Fire and man-made disturbances initiate succession. There are 45 new reports for the District of Mackenzie and 30 for the Yukon. Of the taxa, 86% are found in Europe, Asia, and North America, 9% are known from Asia and North America, whereas only 4% are restricted to North America. Pilophorus robustus is new to Canada. High mountains in the western part of the area, generally nonglaciated during the Wisconsinian, support a flora that contains many Arctic and Arctic–Alpine taxa. Amphi-Beringian species occur primarily in the north.

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