A Pleistocene Mountain Goat from British Columbia and Comments on the Dispersal History of Oreamnos

1971 ◽  
Vol 8 (9) ◽  
pp. 1081-1093 ◽  
Author(s):  
C. R. Harington
Keyword(s):  
British Columbia ◽  
North America ◽  
Pleistocene Glaciation ◽  
History Of ◽  
Mountain Goat ◽  
Glacial Tills

A mountain goat cranial fragment from gravels beneath two thick glacial tills near Quesnel Forks, British Columbia is referred to Oreamnos sp. It is considered to be of last (Sangamon) interglacial age, or older. Oreamnos seems to have entered North America from Eurasia across the Bering Isthmus during a Pleistocene glaciation prior to the last (Wisconsin) glaciation.

History of the Larch Sawfly, with Notes on Origin and Biology,

1955 ◽  
Vol 87 (3) ◽  
pp. 103-111 ◽  
Author(s):  
H. C. Coppel ◽  
K. Leius
Keyword(s):  
British Columbia ◽  
North America ◽  
Native Species ◽  
Insect Pest ◽  
Forest Insect ◽  
Larch Sawfly ◽  
History Of ◽  
Biological Characters ◽  
The Difference ◽  
Forest Biology

The larch sawfly, Pristiphora erichronii (Htg.), is currently considered a major forest insect pest in Canada. At the present time within Canada, the sawfly reacts to parasitism by Mesoleius tenthredinis Morley in two ways. In Manitoba and Saslratchewan the sawfly encapsulates approximately 100 per cent of the parasite eggs deposited, whereas in British Columbia encapsulation rarely exceeds four per cent (Muldrew, 1953). The reasons for the difference in degree of encapsulation are apparently unknown; however, since the origin of the sawfly itself is obscure, the possibility exists that a native species, an introduced species, Or a combination of both may he present, or that geographical or ecological units may have arisen. Studies now under way by officers of the Forest Biology and Entomology divisions are attacking the problem of identity and origin following the pattern established for the European spruce sawfly, Diprion hercyniae (Htg.). In this instance, as with the larch sawfly, parasites were introduced on the assumption that the pest had been introduced from Europe. Critical investigations by Reeks (1941) and Balch, Reeks, and Smith (1941), involving morphological, cytological, and other biological characters, showed that the species occurring in North America was one of two species common in Europe, and previously referred to there as Gilpinia polytoma (Htg.). Balch et al. (1941) showed that D. hercyniae had been introduced into North America.

On the presence ofMixosaurus(Ichthyopterygia: Reptilia) in the Middle Triassic of Nevada

1990 ◽  
Vol 64 (1) ◽  
pp. 161-164 ◽  
Author(s):  
P. Martin Sander ◽  
Hugo Bucher
Keyword(s):  
British Columbia ◽  
North America ◽  
Middle Triassic ◽  
Lower Triassic ◽  
High Arctic ◽  
Western Tethys ◽  
History Of ◽  
Northwestern North America

The small ichthyosaurMixosaurusis the most widely distributed ichthyosaur. It is known from Lower Triassic rocks of British Columbia, Canada (Callaway and Brinkman, 1989), and Middle Triassic rocks of northwestern North America (Alaska, British Columbia), China, Timor, the western Tethys (Switzerland, Italy, Turkey), the Germanic Triassic, and the high Arctic (Spitsbergen, Exmouth Island) (Mazin, 1986; Callaway and Brinkman, 1989; Callaway and Massare, 1989). The presence ofMixosaurusin one of the richest ichthyosaur provinces, the Middle Triassic of Nevada (Merriam, 1908), has been difficult to establish. The history of this problem is very colorful and is the topic of this note together with the description of a new specimen from the Nevada Middle Triassic.

Notes on Anthocoris melanocerus Reuter (Hemiptera: Anthocoridae) as a Predator of the Pear Psylla in British Columbia

1961 ◽  
Vol 93 (8) ◽  
pp. 660-662 ◽  
Author(s):  
Harold F. Madsen
Keyword(s):  
British Columbia ◽  
North America ◽  
Natural Enemies ◽  
Adalia Bipunctata ◽  
Minor Importance ◽  
Pear Psylla ◽  
History Of

The role of natural enemies in the control of the pear psylla, Psylla pyricola Foerst., has been of minor importance in the published history of this pest in North America. Jensen (1957) listed six species of parasites that attack the pear psylla nymph, but only one, Psylledontus insidiosus Cwfd. (Hymenoptera: Encyrtidae), is recorded from North America. Slingerland (1896) stated that the predators Chrysopa oculata Say (Neuroptera: Chrysopidae) and Adalia bipunctata (L.) (Coleoptera: Coccinellidae) were observed in the field feeding on psyllid eggs, nymphs and adults. Georgalla (1957) reported that Anthocoris nemorum L. (Hemiptera: Anthocoridae) fed upon pear psylla eggs and nymphs, but made no reference to effect upon psyllid populations.

scholarly journals Zoppola, Zoppolani and Migration to Western Canada: A Sample Study

2012 ◽  
Vol 33 (1) ◽  
pp. 107-132
Author(s):  
Gabriella Colussi Arthur
Keyword(s):  
British Columbia ◽  
North America ◽  
Capital City ◽  
Western Canada ◽  
Historical Scholarship ◽  
Ellis Island ◽  
History Of ◽  
And Migration ◽  
Friuli Venezia Giulia

This paper investigates the departures and arrivals of a group of Zoppolani, Italians from the northeast of Italy who travelled through Ellis Island to British Columbia in search of work between 1906 and 1923. Zoppola is a municipality located in the center west of the autonomous Friuli Venezia-Giulia Region in northeast Italy, and it is approximately 90 km northwest of Friuli Venezia-Giulia’s capital city of Trieste. It was one of many northern Italian towns from which migrants to North America originated. However, little is known of the considerable number of Zoppolani who left the area in the early 1900s and made their way to western Canada. This sample study examines the historical scholarship in the field, considers challenges posed by a variety of archival records and argues that an understanding of the local geography and history of both the comune of Zoppola and the province of British Columbia is essential to the overall interpretation of the emigrant history discussed.

History of western white pine and blister rust in British Columbia

2009 ◽  
Vol 85 (4) ◽  
pp. 516-520 ◽  
Author(s):  
Richard S. Hunt
Keyword(s):  
British Columbia ◽  
North America ◽  
White Pine ◽  
Blister Rust ◽  
Tree Resistance ◽  
Age Related ◽  
Western White Pine ◽  
Management Plans ◽  
History Of ◽  
Main Production

Blister rust (Cronartium ribicola) entered Europe about 300 years after eastern white pine (Pinus strobus) was first planted in Europe. North America imported millions of infected seedlings after blister rust was firmly established throughout Europe. Blister rust probably entered into western North America on multiple occasions and spread throughout British Columbia (BC) by about 1930. Two large saw mills solely cutting western white pine (P. monticola) started in the 1920s with the main production for matches. Blister rust surveys in the 1940s painted a poor picture for the future of western white pine in BC, so it was discriminated against in forest management plans. Harvest volumes declined and the 2 mills ceased production about 1960. Selection of resistant clones from mature parents occurred between 1948 and 1960, but when it was evident that mature tree resistance was not likely to be in their seedlings the program was terminated. A program based on screening seedlings was started in 1983. The selected seedlings are hypothesized to possess age-related resistance that is being expressed at an early age. These and the better parents are incorporated into orchards. Key words: Cronartium, white pine, surveys, match blocks, rust resistance, PR proteins

Identity of the oribatid mite Oribata curva and transfer to Trichogalumna (Acari, Oribatida, Galumnidae), with discussion of nomenclatural and biogeographical issues in the ‘curva’ species-group

Zootaxa ◽  
2017 ◽  
Vol 4272 (4) ◽  
pp. 551
Author(s):  
ROY A. NORTON ◽  
SERGEY G. ERMILOV
Keyword(s):  
North America ◽  
Oribatid Mite ◽  
Species Group ◽  
Type Material ◽  
Similar Species ◽  
History Of ◽  
Molecular Assessment

Based on the study of type material, other historical specimens, and new collections, the adult of the thelytokous oribatid mite Oribata curva Ewing, 1907 (Galumnidae) is redescribed and the name is recombined to Trichogalumna curva (Ewing, 1907) comb. nov. A confusing history of synonymies and misidentifications is traced in detail, and their effect on published statements about biogeography is assessed. Reliable records of T. curva are only those from North America. The tropical mite Pergalumna ventralis (Willmann, 1932) is not a subspecies of T. curva. The widely-reported Trichogalumna nipponica (Aoki, 1966) and other similar species form a complex with T. curva that needs further morphological and molecular assessment. 

scholarly journals I.—History of the Names Cambrian and Silurian in Geology

1873 ◽  
Vol 10 (111) ◽  
pp. 385-395 ◽  
Author(s):  
T. Sterry Hunt
Keyword(s):  
Great Britain ◽  
North America ◽  
Upper Cambrian ◽  
History Of ◽  
Lower Palaeozoic ◽  
The Subject

It is proposed in the following pages to give a concise account of the progress of investigation of the lower Palæozoic rocks during the last forty years. The subject may naturally be divided into three parts: 1. The history of Silurian and Upper Cambrian in Great Britain from 1831 to 1854; 2. That of the still more ancient Palæozoic rocks in Scandinavia, Bohemia, and Great Britain up to the present time, including the recognition by Barrande of the so-called primordial Palæozoic; fauna; 3. The history of the lower Palæozoic rocks of North America.

Sign in / Sign up

Export Citation Format

Share Document