Late Pleistocene zoogeographic shifts and new collecting records for Helophorus arcticus Brown (Coleoptera: Hydrophilidae) in North America

1989 ◽  
Vol 67 (5) ◽  
pp. 1171-1179 ◽  
Author(s):  
Alan V. Morgan
Keyword(s):  
United States ◽  
North America ◽  
Late Pleistocene ◽  
First Record ◽  
Eastern Canada ◽  
Northern United States ◽  
Late Wisconsinan ◽  
Climatic Records

Helophorus arcticus Brown is a rare hydrophilid beetle, previously known from localities in subarctic and eastern Canada. New sites, including the first record for the province of Quebec, are described with the modern habitats, and climatic records are provided for the known range of the species. Fossil specimens of H. arcticus are known from both early and late Wisconsinan sites in southern Canada and the northern United States. The movement of the species is hypothesized from the last (Sangamonian) Interglacial to the present together with potential new collecting areas in subarctic North America.

A NOTE ON THE OCCURRENCE OF COLEOPHORA FRISCHELLA (LEPIDOPTERA: COLEOPHORIDAE) IN NORTH AMERICA

1967 ◽  
Vol 99 (11) ◽  
pp. 1229-1229 ◽  
Author(s):  
P. G. Pilley ◽  
R. A. Trieselmann
Keyword(s):  
United States ◽  
North America ◽  
Personal Communication ◽  
First Record ◽  
The United States ◽  
Sweet Clover ◽  
Economic Significance ◽  
Melilotus Alba ◽  
St Lawrence River ◽  
Made In

The first record of the occurrence in North America of the white-tipped clover case-moth, Coleophora frischella L., was made in June 1966 when a single adult was taken by Heinemann on Picton Island, N.Y., in the St. Lawrence River (Freeman, personal communication). Independently, Trieselmann collected the larvae from white sweet-clover, Melilotus alba Desr., on 28 July through to 8 August 1966 at many points around Pembroke, Ont. Detailed examinations made at two of the collection points indicated that between 15 and 20% of sweetclover seeds were damaged. Because of its potential economic significance, the authors wish to make the presence of this species known to agricultural entomologists in Canada and the United States.

Notes on larval instars and adult antennae of Neodiprion abietis (Hymenoptera: Diprionidae)

2003 ◽  
Vol 135 (5) ◽  
pp. 745-748
Author(s):  
S.Y. Li
Keyword(s):  
United States ◽  
North America ◽  
United States Of America ◽  
Physiological Study ◽  
Balsam Fir ◽  
Larval Instars ◽  
Neodiprion Abietis ◽  
Northern United States

The native balsam fir sawfly, Neodiprion abietis (Harris) (Hymenoptera: Diprionidae), occurs throughout Canada, Alaska, and the northern United States of America (Rose et al. 1994; Drooz 1985). This sawfly was originally described as Lophyrus abietis (Hymenoptera: Diprionidae) (Harris 1841), then transferred to the genus Diprion (Hymenoptera: Diprionidae) (MacGillivray 1916). Rohwer (1918) established the genus Neodiprion for Nearctic species of the genera Lophyrus and Diprion. Based on differences in size, color, and female genitalic characters between adults reared from the genera Abies, Picea, Pseudotsuga, and Tsuga (Pinaceae), Ross (1955) considered N. abietis as a complex. After a thorough morphological and physiological study, Knerer and Atwood (1972) concluded that there were five strains of N. abietis in North America: one western and four eastern.

First record of Seymouria (Vertebrata: Seymouriamorpha) from Early Permian fissure fills at Richards Spur, Oklahoma

1999 ◽  
Vol 36 (8) ◽  
pp. 1257-1266 ◽  
Author(s):  
Corwin Sullivan ◽  
Robert R Reisz
Keyword(s):  
United States ◽  
North America ◽  
First Record ◽  
The Other ◽  
Early Developmental Stage ◽  
Regular Component ◽  
Early Permian ◽  
Skeletal Morphology ◽  
Mode Of Life ◽  
Early Developmental

Isolated skeletal elements of the amphibian genus Seymouria were recently discovered at the Richards Spur locality near Fort Sill, Oklahoma, a prolific source of Early Permian tetrapod remains. Five of the seven described bones are of juvenile size and include three neural arches, a humerus, and a femur, whereas the other two are partial vertebrae, apparently adult. All seven are morphologically similar to equivalent skeletal elements in Seymouria specimens previously collected in Europe and North America, apart from features reflecting the early developmental stage of the juvenile bones. The femur and humerus are clearly distinct from those of other seymouriamorphs such as Ariekanerpeton and Kotlassia. The rarity of Seymouria at the Richards Spur locality implies that it was not a regular component of the fauna, and it is also associated with the less markedly terrestrial assemblage that consistently occurs at localities in the southwestern United States. However, its skeletal morphology and occurrence at terrestrial localities such as Richards Spur imply a primarily terrestrial, rather than an amphibious, mode of life. Conflicting biostratigraphic correlations imply that the exact age of the Richards Spur deposits is uncertain, and equivalence to the Arroyo Formation of Texas may be erroneous.

Drainage and Water Quality in Northern United States and Eastern Canada

1995 ◽  
Vol 121 (4) ◽  
pp. 296-301 ◽  
Author(s):  
W. F. Ritter ◽  
R. P. Rudra ◽  
P. H. Milburn ◽  
S. Prasher
Keyword(s):  
United States ◽  
Water Quality ◽  
Eastern Canada ◽  
Northern United States

scholarly journals Paleoenvironments along the Eastern Laurentide Ice Sheet Margin and Timing of the Last Ice Maximum and Retreat

2008 ◽  
Vol 41 (2) ◽  
pp. 265-277 ◽  
Author(s):  
Anne de Vernal ◽  
Claude Hillaire-Marcel
Keyword(s):  
Late Pleistocene ◽  
North Atlantic ◽  
Environmental Changes ◽  
Atlantic Water ◽  
Polar Front ◽  
Water Masses ◽  
Labrador Sea ◽  
Eastern Canada ◽  
North Atlantic Water ◽  
Late Wisconsinan

ABSTRACT Palynological and isotopic analysis in a few deep-sea cores from the Labrador Sea reveals strong environmental changes related to the Late Pleistocene glacial fluctuations over eastern Canada. On the whole, the Labrador Sea was characterized by strong exchanges between North Atlantic water masses, Arctic outflows, and meltwater discharges from Laurentide, Greenland and lnuitian ice sheets. The penetration of temperate Atlantic waters persisted throughout most of the Late Pleistocene, with a brief interruption during the Late Wisconsinan. During this glacial substage, a slight but continuous meltwater runoff from the Laurentide ice margins grounded on the northern Labrador Shelf is indicated by relatively low 18O values and low-salinity (< 30‰) dinocyst assemblages. The calving of the ice margin, the melwater outflow and the subsequent dilution of surface waters offshore Labrador probably contributed to the dispersal of floating ice and, consequently, to a southward displacement of the polar front restraining the penetration of North Atlantic waters into the Labrador Sea. The advection of southern air masses along the Laurentide ice margins, shown by pollen assemblages, was favourable to abundant precipitation and therefore, high ice accumulation rates, especially over northern Labrador during the Late Wisconsinan. The déglaciation is marked by a brief, but significant, melting event of northern Laurentide ice shortly after 17 ka. The main glacial retreat occurred after ca. 11 ka. It allowed restoration of WSW-ENE atmospheric trajectories, increased phytoplanktonic productivity, and penetration of North Atlantic water masses into the Labrador Sea.

Lithocolletis blancardella Fabricius (Lepidoptera: Gracilariidae) on Apple in Eastern North America with Notes on Other Species Occurring on Rosaceae

1964 ◽  
Vol 96 (11) ◽  
pp. 1442-1449 ◽  
Author(s):  
H. T. Stultz
Keyword(s):  
United States ◽  
North America ◽  
Leaf Miner ◽  
Eastern North America ◽  
Similar Species ◽  
Black Cherry ◽  
Northeastern United States ◽  
Maritime Provinces ◽  
Eastern Canada ◽  
Large Numbers

AbstractA spotted tentiform leaf miner, often present during recent years in large numbers in apple orchards in the Maritime Provinces of Canada, is identified as Lithocolletis blancardella Fabr., a species common on apples in Europe. Recent collecting indicates that the species occurs widely in Eastern Canada and the northeastern United States. Diagnostic characters, especially those of the male genitalia, are compared with those of specimens identified as L. crataegella Clem. and L. propinquinella Braun, two similar species which commonly occur on apple and black cherry respectively.

GYRINUS (GYRINULUS) CAVATUS SP.NOV. FROM NORTH AMERICA DESCRIBED AND COMPARED WITH GYRINUS (GYRINULUS) MINUTUS FABRICIUS (COLEOPTERA: GYRINIDAE)

1990 ◽  
Vol 122 (4) ◽  
pp. 651-657
Author(s):  
F.M. Atton
Keyword(s):  
United States ◽  
North America ◽  
Type Locality ◽  
Northern United States

AbstractGyrinus cavatus sp.nov. (type locality: Floral, Saskatchewan, Canada), from across Canada, is compared with G. minutus Fabricius. The two species are broadly sympatric in the northern boreal and transition forests, but G. cavatus is more abundant southward into the northern United States. Therefore, the subgenus Gyrinulus Zaitsev is not monobasic, but has three species in North America, including G. rockinghamensis LeConte.

scholarly journals The Canadian Archaeological Radiocarbon Database (Card): Archaeological 14C Dates in North America and Their Paleoenvironmental Context

Radiocarbon ◽  
2011 ◽  
Vol 53 (2) ◽  
pp. 371-394 ◽  
Author(s):  
K Gajewski ◽  
S Munoz ◽  
M Peros ◽  
A Viau ◽  
R Morlan ◽  
...  
Keyword(s):  
United States ◽  
North America ◽  
Large Scale ◽  
Geographic Location ◽  
Current Status ◽  
Archaeological Sites ◽  
Demographic Trends ◽  
European Contact ◽  
Northern United States ◽  
Population Numbers

Databases of accumulated paleoecological and archaeological records provide a means for large-scale syntheses of environmental and cultural histories. We describe the current status of the Canadian Archaeological Radiocarbon Database (CARD), a searchable collection of more than 36,000 14C dates from archaeological and paleontological sites from across North America. CARD, built by the late Dr Richard Morlan of the Canadian Museum of Civilization, consists of uncalibrated 14C data as well as information about the material dated, the cultural association of the date (e.g. Paleoindian, Archaic, Woodland), and its geographic location. The database can be used to study questions relating to prehistoric demography, migrations, human vulnerability to environmental change, and human impact on the landscape, but biases relating to sampling intensity and taphonomy must first be accounted for. Currently, Canada and the northern United States are well represented in the database, while the southern United States is underrepresented. The frequency of 14C dates associated with archaeological sites increases through time from 15,000 cal yr BP until European contact, which likely reflects, among other factors, both the destruction of older cultural carbon due to erosion and dissolution and increasing population numbers through time. An exploratory analysis of the dates reveals their distribution in both time and space, and suggests that the database is sufficiently complete to enable quantitative analysis of general demographic trends.

A new brachypterous species of Elachiptera Becker (Diptera: Chloropidae) from freshwater wetlands in eastern Canada

Zootaxa ◽  
2003 ◽  
Vol 360 (1) ◽  
pp. 1 ◽  
Author(s):  
TERRY A. WHEELER
Keyword(s):  
United States ◽  
North America ◽  
Salt Marshes ◽  
Wing Length ◽  
Freshwater Wetlands ◽  
Sister Species ◽  
Eastern United States ◽  
Eastern Canada ◽  
Coastal Salt Marshes

Elachiptera aquila sp. nov. is described from freshwater wetlands in Ontario and Quebec, Canada. Its apparent sister species is Elachiptera salinaria Sabrosky and Valley, known from coastal salt marshes in the eastern United States. Although there are Palearctic Elachiptera that are polymorphic for wing length, this is the first brachypterous species of the genus described from North America.

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