A Late Pleistocene capybara (Rodentia, Caviidae, Hydrochoerinae) from near Houston, Texas, USA, with a brief review of North American fossil capybaras

2020 ◽  
Vol 167 (1) ◽  
pp. 57
Author(s):  
Jon Baskin ◽  
P. Darrow Gervais ◽  
Camille J. Gervais
Keyword(s):  
Late Pleistocene ◽  
North American

scholarly journals Late Pleistocene range expansion of North American topminnows accompanied by admixture and introgression

2019 ◽  
Vol 46 (9) ◽  
pp. 2126-2140 ◽  
Author(s):  
David D. Duvernell ◽  
Eric Westhafer ◽  
Jacob F. Schaefer
Keyword(s):  
Late Pleistocene ◽  
North American ◽  
Range Expansion

scholarly journals Ancient individuals from the North American Northwest Coast reveal 10,000 years of regional genetic continuity

2017 ◽  
Vol 114 (16) ◽  
pp. 4093-4098 ◽  
Author(s):  
John Lindo ◽  
Alessandro Achilli ◽  
Ugo A. Perego ◽  
David Archer ◽  
Cristina Valdiosera ◽  
...  
Keyword(s):  
Pacific Northwest ◽  
Late Pleistocene ◽  
North American ◽  
Archaeological Site ◽  
Northwest Coast ◽  
Genetic Lineage ◽  
Pacific Northwest Coast ◽  
The Pacific ◽  
Genetic Continuity ◽  
Low Coverage

Recent genomic studies of both ancient and modern indigenous people of the Americas have shed light on the demographic processes involved during the first peopling. The Pacific Northwest Coast proves an intriguing focus for these studies because of its association with coastal migration models and genetic ancestral patterns that are difficult to reconcile with modern DNA alone. Here, we report the low-coverage genome sequence of an ancient individual known as “Shuká Káa” (“Man Ahead of Us”) recovered from the On Your Knees Cave (OYKC) in southeastern Alaska (archaeological site 49-PET-408). The human remains date to ∼10,300 calendar (cal) y B.P. We also analyze low-coverage genomes of three more recent individuals from the nearby coast of British Columbia dating from ∼6,075 to 1,750 cal y B.P. From the resulting time series of genetic data, we show that the Pacific Northwest Coast exhibits genetic continuity for at least the past 10,300 cal y B.P. We also infer that population structure existed in the late Pleistocene of North America with Shuká Káa on a different ancestral line compared with other North American individuals from the late Pleistocene or early Holocene (i.e., Anzick-1 and Kennewick Man). Despite regional shifts in mtDNA haplogroups, we conclude from individuals sampled through time that people of the northern Northwest Coast belong to an early genetic lineage that may stem from a late Pleistocene coastal migration into the Americas.

Measuring Late Quaternary Ursid Diminution in the Midwest

1998 ◽  
Vol 49 (3) ◽  
pp. 322-329 ◽  
Author(s):  
Steve Wolverton ◽  
R.Lee Lyman
Keyword(s):  
Late Pleistocene ◽  
North American ◽  
Ursus Americanus ◽  
Late Quaternary ◽  
Black Bears ◽  
American Midwest ◽  
The Past ◽  
American Black ◽  
American Black Bears ◽  
Average Size

Paleobiologists generally agree that within the past 10,000 yr North American black bears (Ursus americanus) have decreased in body and tooth size. Some researchers infer that diminution was gradual and continuous; thus, one might infer that a specimen is old if it is larger than an average-size modern bear. Ursid remains recovered in the 1950s from Lawson Cave, Missouri, that are larger than some modern bears have been reported to date to the late Pleistocene, but association with modern taxa, taphonomic considerations, and a radiocarbon date of 200 yr B.P. indicate that they are modern. Modern specimens from Lawson Cave and other parts of the American Midwest are relatively large compared to modern North American black bears from other areas, suggesting that many supposed late Pleistocene bears from the area might be modern also.

OMALONOMUS RELICTUS, AN UNUSUAL NEW GENUS AND NEW SPECIES (COLEOPTERA: STAPHYLINIDAE, OMALHNAE) OF BLIND ROVE BEETLE; A PREGLACIAL (TERTIARY?) RELICT IN THE CYPRESS HILLS, ALBERTA–SASKATCHEWAN, CANADA

1990 ◽  
Vol 122 (5) ◽  
pp. 949-961 ◽  
Author(s):  
J.M. Campbell ◽  
S.B. Peck
Keyword(s):  
New Species ◽  
Late Pleistocene ◽  
North American ◽  
New Genus ◽  
Rove Beetle ◽  
Structural Peculiarities ◽  
Subterranean Habitat

AbstractOmalonomus relictus, a highly modified new genus and new species of soil-dwelling rove beetle, is described from the Cypress Hills of Alberta and Saskatchewan. The structural peculiarities associated with its subterranean habitat are discussed and illustrated. Moore and Legner’s (1974) key to the genera of North American Omaliinae is modified to assist in the identification of adults of the genus. The occurrence of this blind, slightly pigmented, flightless beetle in the soil of the Cypress Hills supports the hypothesis that at least part of this area was unglaciated and served as a refugium during late Pleistocene glacial advances.

Glacially-influenced late Pleistocene stratigraphy of a passive margin: New Jersey's Record of the North American ice sheet

2005 ◽  
Vol 218 (1-4) ◽  
pp. 155-173 ◽  
Author(s):  
John S. Carey ◽  
Robert E. Sheridan ◽  
Gail M. Ashley ◽  
Jane Uptegrove
Keyword(s):  
Late Pleistocene ◽  
North American ◽  
Ice Sheet ◽  
Passive Margin ◽  
The North

scholarly journals Fossil and genomic evidence constrains the timing of bison arrival in North America

2017 ◽  
Vol 114 (13) ◽  
pp. 3457-3462 ◽  
Author(s):  
Duane Froese ◽  
Mathias Stiller ◽  
Peter D. Heintzman ◽  
Alberto V. Reyes ◽  
Grant D. Zazula ◽  
...  
Keyword(s):  
North America ◽  
Sea Level ◽  
Late Pleistocene ◽  
North American ◽  
Marine Isotope Stage ◽  
Mitochondrial Genomes ◽  
Subsequent Evolution ◽  
Large Mammal ◽  
Morphological Diversification ◽  
Steppe Bison

The arrival of bison in North America marks one of the most successful large-mammal dispersals from Asia within the last million years, yet the timing and nature of this event remain poorly determined. Here, we used a combined paleontological and paleogenomic approach to provide a robust timeline for the entry and subsequent evolution of bison within North America. We characterized two fossil-rich localities in Canada’s Yukon and identified the oldest well-constrained bison fossil in North America, a 130,000-y-old steppe bison, Bison cf. priscus. We extracted and sequenced mitochondrial genomes from both this bison and from the remains of a recently discovered, ∼120,000-y-old giant long-horned bison, Bison latifrons, from Snowmass, Colorado. We analyzed these and 44 other bison mitogenomes with ages that span the Late Pleistocene, and identified two waves of bison dispersal into North America from Asia, the earliest of which occurred ∼195–135 thousand y ago and preceded the morphological diversification of North American bison, and the second of which occurred during the Late Pleistocene, ∼45–21 thousand y ago. This chronological arc establishes that bison first entered North America during the sea level lowstand accompanying marine isotope stage 6, rejecting earlier records of bison in North America. After their invasion, bison rapidly colonized North America during the last interglaciation, spreading from Alaska through continental North America; they have been continuously resident since then.

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