Eocene clavagellids (Mollusca: Pelecypoda) from Florida: the first documented occurrence in the Cenozoic of the Western Hemisphere

1989 ◽  
Vol 63 (3) ◽  
pp. 320-323 ◽  
Author(s):  
Douglas S. Jones ◽  
David Nicol

By the end of the Cretaceous, the Clavagellidae (Mollusca: Pelecypoda) maintained a distribution that was marginal to the core-Tethys, occurring in both North America and the Old World. Traditional paleozoogeographic interpretation contends that the clavagellids then went extinct in the New World because no Cenozoic fossil or living clavagellids have been documented from the Western Hemisphere. This report describes the occurrence of Eocene clavagellids from the Ocala Group of peninsular Florida. The presence of these pelecypods in Upper Eocene strata is consistent with the large Tethyan faunal component already known from this unit and requires a reassessment of Tertiary zoogeographic patterns for the clavagellids.

2007 ◽  
Vol 73 (21) ◽  
pp. 7114-7117 ◽  
Author(s):  
Siobain Duffy ◽  
Edward C. Holmes

ABSTRACT A phylogenetic analysis of three genomic regions revealed that Tomato yellow leaf curl virus (TYLCV) from western North America is distinct from TYLCV isolated in eastern North America and the Caribbean. This analysis supports a second introduction of this Old World begomovirus into the New World, most likely from Asia.


1979 ◽  
Vol 1 (1) ◽  
pp. 3-44 ◽  
Author(s):  
J. M. Adovasio ◽  
J. D. Gunn ◽  
J. Donahue ◽  
R. Stuckenrath ◽  
J. Guilday ◽  
...  

Meadowcroft Rockshelter is a deeply stratified multicomponent site in Washington County, southwestern Pennsylvania. The eleven well defined stratigraphic units identified at the site span at least 16,000, and perhaps 19,000 years of intermittent occupation by groups representing all of the major cultural stages/periods now recognized in northeastern North America. Throughout the extant sequence, the site served as a locus for hunting, collecting and food processing activities which involved the seasonal exploitation of the immediately adjacent Cross Creek valley and contiguous uplands. Presently, Meadowcroft Rockshelter represents the earliest well dated evidence of man in the New World as well as the longest occupational sequence in the Western Hemisphere.


2001 ◽  
Vol 13 (2) ◽  
pp. 109-134 ◽  
Author(s):  
Jennifer Smith

In this article, I conduct a quantitative analysis of negative concord in Buckie, a relic dialect from the northeast of Scotland, and compare these findings with transported varieties of English in North America. Two major results arise from the analysis. First, Buckie has high rates of use of negative concord to indeterminates within the same clause, as do all the dialects included in the study. Second, negative concord in other environments is found in certain varieties in the New World that have no counterparts in the Old World. I suggest that the quantitative similarities can be explained in terms of the primitive status of negative concord in vernacular varieties of English, in combination with a shared linguistic heritage during the colonial period. The qualitative differences demonstrate that contexts of linguistic heterogeneity in North America during the early colonization period led to an extension and restructuring of the original rules.


Zootaxa ◽  
2012 ◽  
Vol 3445 (1) ◽  
pp. 67 ◽  
Author(s):  
CRISTINA MAYORGA MARTINEZ ◽  
LUIS CERVANTES PEREDO ◽  
JERZY A. LIS

The genus Amnestus was described by Dallas in 1851, as a New World genus, and it was ratified by Froeschner (1960) in his revision for the Western Hemisphere Cydnidae.


1951 ◽  
Vol 83 (6) ◽  
pp. 156-160 ◽  
Author(s):  
George P. Holland

As the flea fauna of mammals of northern North America becomes better known, its very close affinity with that of temperate and northern Asia becomes more apparent. Many of the genera are holarctic and are associated with holarctic genera of mammals. In a few instances, the fleas of the Old World and the New World are so similar in morphological details and host association that they are regarded as subspecies. For example, Amphipsylla sibirica (Wagner), Malaraeus penicilliger (Grube), Megabothris calcarifer (Wagner), and Hoplopsyllus glacialis (Taschenberg) have representatives in both the nearctic and the palaearctic regions. To this list must now be added Catallagia dacenkoi Ioff, a parasite of Microtinae; this species was described originally (Ioff, 1940, pp. 216-217) from the Altai Mountains of central Russia, and a new subspecies has now been discovered in northern Canada and Alaska.


1953 ◽  
Vol 19 (1) ◽  
pp. 25-39 ◽  
Author(s):  
Paul Tolstoy

Asiatic origins have, at one time or another, been suggested or at least considered for a number of traits connected with the manufacture and decoration of the earlier New World pottery. The well-known paper by McKern (1937) is among the most explicit statements on the subject. Griffin (1946; Sears and Griffin 1950a) has held similar views for some time. Like McKern, he has primarily in mind traits of the Woodland pattern of eastern North America, although he also mentions some non-Woodland traits among those which have counterparts in the Old World (1946, p. 45).Since McKern's paper, the distribution in time of the traits involved has become a lot better established. With the help of the still suspiciously regarded radiocarbon dates, our perspective on ceramic history in the United States has been extended over a span which appears to be that of some four millennia. Among the more significant additions to the Asiatic half of the distributional picture first place must be given to recent Soviet work in eastern Siberia.


1980 ◽  
Vol 1 (2) ◽  
pp. 99-137 ◽  
Author(s):  
J. M. Adovasio ◽  
J. D. Gunn ◽  
J. Donahue ◽  
R. Stuckenrath ◽  
J. Guilday ◽  
...  

Meadowcroft Rockshelter is a deeply stratified multicomponent site in Washington County, southwestern Pennsylvania. The eleven well defined stratigraphic units identified at the site span at least 16,000, and perhaps 19,000 years of intermittent occupation by groups representing all of the major cultural stages/periods now recognized in northeastern North America. Throughout the extant sequence, the site served as a locus for hunting, collecting and food processing activities which involved the seasonal exploitation of the immediately adjacent Cross Creek valley and contiguous uplands. Presently, Meadowcroft Rockshelter represents the earliest well dated evidence of man in the New World as well as the longest occupational sequence in the Western Hemisphere.


2003 ◽  
Vol 17 (4) ◽  
pp. 529 ◽  
Author(s):  
Wayne P. Maddison ◽  
Marshal C. Hedin

A phylogenetic analysis of five sequenced genes (28S, 16S, EF1-α, CO1, ND1) from 81 genera of jumping spiders (Salticidae) and five outgroups supports the monophyly of the Dendryphantinae and Euophryinae and refines the concepts of the Plexippinae and Pelleninae. The clade that excludes lyssomanines and spartaeines and contains the bulk of salticid species is formally named as the Salticoida. The previously proposed clade delimited by an embolus articulated and separated from the tegulum by a developed distal hematodocha (as opposed to fused immovably to the tegulum) is rejected, suggesting the 'free embolus' evolved independently several times. Three major clades are discovered, the Marpissoida (including Dendryphantinae, Marpissinae and smaller groups such as synagelines), the Plexippoida (plexippines plus pellenines) and the Amycoida (including Amycinae, Sitticinae, Hyetusseae, Hurieae, Synemosyninae). The amycoids form a large neotropical radiation from which only a single known group (Sitticus and Attulus) has reached the Old World. The marpissoids also constitute a major New World group with relatively few species in the Old World. In contrast, the Plexippoida is predominantly an Old World group (except for the spectacular radiation of Habronattus in North America), as is the Heliophaninae. These results suggest that much of salticid diversification occurred after the separation of the continents of the Old World and New World.


1958 ◽  
Vol 23 (4) ◽  
pp. 397-418 ◽  
Author(s):  
Paul Tolstoy

In an earlier study (Tolstoy 1953b), we attempted to outline the Old World distributions of a limited number of ceramic elements and to make a case for their introduction into North America some 3000 to 4000 years ago. Russian reports that have appeared or become available to us since then (Okladnikov 1945, 1946, 1950b, 1955a, 1955b), as well as recent work this side of Bering Strait, prompt now a review of the sequence in the Lena Basin as a whole with North America parallels in mind. The main emphasis here is on the Neolithic of the Lena drainage and Archaic to Early Woodland developments in eastern North America.


1991 ◽  
Vol 123 (4) ◽  
pp. 777-793 ◽  
Author(s):  
Lubomir Masner

AbstractThe Nearctic species of the genus Duta are revised. Two new species are described: D. foveolata (Canada, USA) and D. policeps (Canada, USA). Duta virginiensis (Ashmead), new combination, is shown to be widely distributed in the Western Hemisphere, extending to the New World tropics. A diagnosis of Duta and a key to the Nearctic species are given. The impact of environmental degradation on the frequency of Duta species in North America is discussed.


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