A Taxonomic Revision of the Genus Antennaria (Asteraceae: Inuleae: Gnaphaliinae) of Alaska and Yukon Territory, Northwestern North America

1993 ◽  
Vol 25 (2) ◽  
pp. 150 ◽  
Author(s):  
Randall J. Bayer
Keyword(s):  
North America ◽  
Taxonomic Revision ◽  
Yukon Territory ◽  
Northwestern North America

scholarly journals First Records of the Northern Long-eared Bat, Myotis septentrionalis, in the Yukon Territory

2006 ◽  
Vol 120 (1) ◽  
pp. 39 ◽  
Author(s):  
Thomas S. Jung ◽  
Brian G. Slough ◽  
David W. Nagorsen ◽  
Tanya A. Dewey ◽  
Todd Powell
Keyword(s):  
Population Structure ◽  
North America ◽  
Adult Male ◽  
Yukon Territory ◽  
River Valley ◽  
Myotis Septentrionalis ◽  
Northwestern North America

Three adult male Northern Long-eared Bats, Myotis septentrionalis, were captured in mist nets in July 2004 in the LaBiche River Valley, southeastern Yukon. These are the first records of M. septentrionalis in the Yukon. Further survey work is needed to delineate the extent of the range and population structure of this and other species of bats in northwestern North America.

Four new species of Draba in northwestern North America

1979 ◽  
Vol 57 (18) ◽  
pp. 1873-1875 ◽  
Author(s):  
Gerald A. Mulligan
Keyword(s):  
New Species ◽  
North America ◽  
Yukon Territory ◽  
Northwestern North America

Four new species of Draba are described from material collected in northwestern North America, D. hatchiae G. A. Mulligan sp.nov. and D. murrayi G. A. Mulligan sp.nov. (2n = 48) from Alaska, and D. kluanei G. A Mulligan sp.nov. and D. scotteri G. A. Mulligan sp.nov. (n = 48) from the Yukon Territory. The four new species are fitted into a previously published key to Draba of Canada and Alaska.

Changing ideas on the identity and stratigraphic significance of the Sheep Creek tephra beds in Alaska and the Yukon Territory, northwestern North America

2008 ◽  
Vol 178 (1) ◽  
pp. 183-209 ◽  
Author(s):  
J.A. Westgate ◽  
S.J. Preece ◽  
D.G. Froese ◽  
N.J.G. Pearce ◽  
R.G. Roberts ◽  
...  
Keyword(s):  
North America ◽  
Yukon Territory ◽  
Tephra Beds ◽  
Northwestern North America

Supplemental material: Cenozoic to Recent plate configurations in the Pacific Basin: Ridge subduction and slab window magmatism in western North America

2006 ◽  
Author(s):  
J.K. Madsen ◽  
D.J. Thorkelson ◽  
R.M. Friedman ◽  
D.D. Marshall
Keyword(s):  
North America ◽  
Pacific Basin ◽  
Western North America ◽  
File Size ◽  
Tectonic Model ◽  
Ridge Subduction ◽  
The Pacific ◽  
Northwestern North America ◽  
Slab Window

Geosphere, February 2006, v. 2, p. 11-34, doi: 10.1130/GES00020.1. Movie 1 - Tectonic model for the Pacific Basin and northwestern North America from 53 Ma to 39 Ma. The file size is 1.3 MB.

Late Quaternary paleoenvironments of Northwestern North America: implications for inland versus coastal migration routes

2001 ◽  
Vol 20 (1-3) ◽  
pp. 301-314 ◽  
Author(s):  
Carole A.S Mandryk ◽  
Heiner Josenhans ◽  
Daryl W Fedje ◽  
Rolf W Mathewes
Keyword(s):  
North America ◽  
Late Quaternary ◽  
Migration Routes ◽  
Northwestern North America

Chromosome races in Rumex arcticus (Polygonaceae)

1972 ◽  
Vol 50 (2) ◽  
pp. 378-380
Author(s):  
Gerald A. Mulligan ◽  
Clarence Frankton
Keyword(s):  
North America ◽  
North American ◽  
Bering Sea ◽  
Kamchatka Peninsula ◽  
The Arctic ◽  
Chromosome Races ◽  
High Polyploid ◽  
Seward Peninsula ◽  
Northwestern North America ◽  
The Bering Sea

Rumex arcticus Trautv., a species found on the mainland of northwestern North America and in northeastern U.S.S.R., contains tetraploid (2n = 40), dodecaploid (2n = 120), and perhaps 2n = 160 and 2n = 200 chromosome races. Most North American plants are tetraploid and are larger in size and have more compound and contiguous inflorescences than typical R. arcticus. Typical plants of R. arcticus occur in the arctic U.S.S.R., St. Lawrence Island in the Bering Sea, and at the tip of the Seward Peninsula of Alaska, and they all have 120 or more somatic chromosomes. High polyploid plants of R. arcticus that resemble North American tetraploids in appearance apparently occur on the Kamchatka Peninsula. These have been called R. kamtshadalus Komarov or R. arcticus var. kamtshadalus (Kom.) Rech. f. by some authors.

scholarly journals Generic revision of the Holocystitidae of North America (Diploporita, Echinodermata) based on universal elemental homology

2017 ◽  
Vol 91 (4) ◽  
pp. 755-766 ◽  
Author(s):  
Sarah L. Sheffield ◽  
Colin D. Sumrall
Keyword(s):  
North America ◽  
North American ◽  
Taxonomic Revision ◽  
Junior Synonym ◽  
Oral Plate ◽  
Fundamental Misunderstanding ◽  
Oral Area

AbstractThe Holocystites Fauna is an enigmatic group of North American diploporitans that presents a rare window into unusual middle Silurian echinoderm communities. Multiple systematic revisions have subdivided holocystitids on the basis of presumed differences in oral area plating and respiratory structures. However, these differences were based on a fundamental misunderstanding of the homologous elements of the oral area and the taphonomic process; taphonomic disarticulation of the oral area formed the basis for the erection of Pentacystis and Osgoodicystis as separate genera, and Osgoodicystis is interpreted as the junior synonym of Pentacystis. Holocystitids show a conservative peristomial bordering plate pattern that is shared among all described genera. The peristome is bordered by seven interradially positioned oral plates as is typical for oral plate–bearing blastozoans. A second open circlet of facetal plates lies distal to the oral plates; five of these facetal plates bear facets for feeding appendages (lost on the A ambulacrum in some taxa), while two lateral facets (present in all taxa except Pustulocystis) do not. Holocystitid taxa show minor modifications to this basic peristomial bordering plate pattern. As thecal morphologies are highly variable within populations, taxonomic revision of holocystitids is based on modifications of the plating of the oral area.

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