Palaeocarpinus (Extinct Betulaceae) from Northwestern China: New Evidence for Paleocene Floristic Continuity between Asia, North America, and Europe

1996 ◽  
Vol 157 (2) ◽  
pp. 240-246 ◽  
Author(s):  
Steven R. Manchester ◽  
Guo Shuang-Xing
Keyword(s):  
North America ◽  
Northwestern China ◽  
New Evidence

Fossil flower of Staphylea L. from the Miocene amber of Mexico: New evidence of the Boreotropical Flora in low-latitude North America

2017 ◽  
Vol 108 (4) ◽  
pp. 471-478 ◽  
Author(s):  
Ana L. Hernández-Damián ◽  
Sergio R. S. Cevallos-Ferriz ◽  
Alma R. Huerta-Vergara
Keyword(s):  
North America ◽  
Northern Hemisphere ◽  
Fossil Record ◽  
First Record ◽  
High Latitudes ◽  
Low Latitude ◽  
Southern Mexico ◽  
Apparent Lack ◽  
History Of ◽  
New Evidence

ABSTRACTA new flower preserved in amber in sediments of Simojovel de Allende, México, is identified as an extinct member of Staphyleaceae, a family of angiosperms consisting of only three genera (Staphylea, Turpinia and Euscaphis), which has a large and abundant fossil record and is today distributed over the Northern Hemisphere. Staphylea ochoterenae sp. nov. is the first record of a flower for this group, which is small, pedicelled, pentamer, bisexual, with sepals and petals with similar size, dorsifixed anthers and superior ovary. Furthermore, the presence of stamens with pubescent filaments allows close comparison with extant flowers of Staphylea bulmada and S. forresti, species currently growing in Asia. However, their different number of style (one vs. three) and the apparent lack of a floral disc distinguish them from S. ochoterenae. The presence of Staphyleaceae in southern Mexico ca. 23 to 15My ago is evidence of the long history of integration of vegetation in low-latitude North America, in which some lineages, such as Staphylea, could move southwards from high latitudes of the Northern Hemisphere, as part of the Boreotropical Flora. In Mexico it grew in association with tropical elements, as suggested by the fossil record of the area.

The Oldest Bryozoans: New Evidence From the Late Tremadocian (Early Ordovician) of East Yangtze Gorges in China

2007 ◽  
Vol 81 (6) ◽  
pp. 1308-1326 ◽  
Author(s):  
Feng-Sheng Xia ◽  
Sen-Gui Zhang ◽  
Zong-Zhe Wang
Keyword(s):  
New Species ◽  
North America ◽  
New Genus ◽  
Early Ordovician ◽  
The World ◽  
New Evidence ◽  
New Bryozoans

Previous reports of Cambrian bryozoans have proved not to be bryozoans. No pre-Ordovician bryozoans have been recognized. The oldest unequivocal bryozoans known from North America, Britain, and Russia are evidently of early Arenigian age. New bryozoans recently collected from the Fenxiang Formation in the Daping and Guanzhuangping sections, situated in the area east of the Yangtze Gorges, are described here, including one new genus, Orbiramus, and six new species, Nekhorosheviella nodulifera, N. semisphaerica, Orbiramus normalis, O. ovalis, O. minus, and Prophyllodictya prisca. These are assigned to the Trepostomida, apart from the last species which belongs to the Cryptostomida. The new bryozoans are from the conodont Paltodus deltifer deltifer Zone of the late Tremadocian age, the first three species possibly being present in the P. deltifer pristinus Subzone at the base. Therefore, they are the oldest bryozoans known from anywhere in the world. Extensive reefs resulting from a major regression in the late Tremadocian were dominated by bryozoans in the upper Fenxiang Formation. The bryozoans lived in a shoal environment and accumulated essentially in situ, showing no signs of significant transportation.

New Evidence for the Antiquity of Man in North America Deduced from Aspartic Acid Racemization

Science ◽  
1974 ◽  
Vol 184 (4138) ◽  
pp. 791-793 ◽  
Author(s):  
J. L. Bada ◽  
R. A. Schroeder ◽  
G. F. Carter
Keyword(s):  
North America ◽  
Aspartic Acid ◽  
Aspartic Acid Racemization ◽  
New Evidence

186. New Evidence Concerning Early Man in North America

Man ◽  
1964 ◽  
Vol 64 ◽  
pp. 152
Author(s):  
Alan Lyle Bryan
Keyword(s):  
North America ◽  
New Evidence

A new basal hadrosauriform dinosaur (Ornithischia: Iguanodontia) from the Early Cretaceous of northwestern China

2009 ◽  
Vol 46 (12) ◽  
pp. 949-957 ◽  
Author(s):  
Hai-Lu You ◽  
Da-Qing Li
Keyword(s):  
Phylogenetic Analysis ◽  
North America ◽  
Early Cretaceous ◽  
Gansu Province ◽  
Northwestern China ◽  
Occipital Condyle ◽  
Close Relative ◽  
Asian Origin ◽  
Posterior Portion ◽  
Early Late

A new hadrosauriform dinosaur, Jintasaurus meniscus gen. et sp. nov., is reported from the Lower Cretaceous Xinminpu Group of the Yujingzi Basin, Jiuquan area, Gansu Province, northwestern China. It is represented by an articulated posterior portion of the skull and is unique in having an extremely long, pendant and crescentic paroccipital process with its ventral tip projecting far beyond the ventral level of the occipital condyle. Phylogenetic analysis recovers Jintasaurus as the sister-taxon to Hadrosauroidea, more derived than other Early Cretaceous hadrosauriforms and Protohadros from the early Late Cretaceous of North America. This discovery adds one more close relative to Hadrosauroidea in Asia and supports an Asian origin for this group.

scholarly journals Large Asian dust layers continuously reached North America in April 2010

2011 ◽  
Vol 11 (14) ◽  
pp. 7333-7341 ◽  
Author(s):  
I. Uno ◽  
K. Eguchi ◽  
K. Yumimoto ◽  
Z. Liu ◽  
Y. Hara ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
North America ◽  
Asian Dust ◽  
Northwestern China ◽  
Central Pacific ◽  
Pressure System ◽  
Near Surface ◽  
Dust Transport ◽  
Aerosol Model ◽  
Central Pacific Ocean

Abstract. The NASA space-borne Mie-lidar system CALIPSO/CALIOP revealed that multiple large Asian dust layers with a horizontal scale of 2000–3000 km reached North America, occupying the full troposphere, in April 2010. This kind of dust layer transport has not been reported before. Our analysis of CALIOP data and global aerosol model results revealed that frequent dust emissions occurred in northwestern China because of stronger-than-average near-surface winds, and that strong stable westerly winds carried the Asian dust from northwestern China to the central Pacific Ocean. A negative pressure anomaly was located in the eastern Pacific Ocean, and the main dust transport path was split into two branches: a northern path and a southern path over North America. Northern-path dust was trapped and stagnant for a longer time than southern path dust and finally subsided under a high-pressure system. Dust along the southern path reached the central US. These complex conditions resulted in a multi-layered structure of dust over North America.

Invertebrate trace fossils and agglutinated foraminifera as indicators of marine influence within the classic Carboniferous section at Joggins, Nova Scotia, Canada

1995 ◽  
Vol 32 (12) ◽  
pp. 2027-2039 ◽  
Author(s):  
Allen W. Archer ◽  
John H. Calder ◽  
Martin R. Gibling ◽  
Robert D. Naylor ◽  
Donald R. Reid ◽  
...  
Keyword(s):  
Nova Scotia ◽  
North America ◽  
Brackish Water ◽  
Eastern North America ◽  
Fluvial Systems ◽  
Biogenic Structures ◽  
Water Conditions ◽  
Marine Influence ◽  
New Evidence ◽  
Agglutinated Foraminifera

The sea cliffs at Joggins, Nova Scotia, are the most extensive and continuous Carboniferous section in eastern North America. Although the section has been considered to have formed within a nonmarine depositional basin, paleobiological information indicates that parts of the section were deposited in brackish water. The occurrence of a trace-fossil assemblage, which includes Cochlichnus, Kouphichnium, and Treptichnus, is part of an assemblage of biogenic structures that apparently reflects paleodeposition within fluvial systems that may have experienced distal marine influences. Presence of agglutinated foraminifera characteristic of brackish-water environments supports this interpretation. This information provides new evidence of brackish-water conditions at Joggins such as those now being widely recognized in other Carboniferous coal-bearing sections.

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