THE FRESH-WATER MOLLUSCA OF SUB-ARCTIC CANADA

1938 ◽  
Vol 16d (5) ◽  
pp. 93-138 ◽  
Author(s):  
Alan Mozley
Keyword(s):  
North America ◽  
Arctic Region ◽  
Close Relation ◽  
Arctic Canada ◽  
Habitat Types ◽  
Systematic Account ◽  
Northern Asia ◽  
History Of ◽  
Molluscan Fauna ◽  
Geographical Elements

A systematic account is given of the constitution, distribution and geographical affinities of the molluscan fauna occurring in fresh waters of sub-arctic Canada. The area covered is that part of western Ontario, Manitoba, Saskatchewan and Alberta lying north of N. Lat. 49°. A total of 111 species and varieties was collected and identified. Types of habitat available in this region for settlement by molluscs have been classified, and the local distribution of the species in them observed. A brief description of seven principal habitat types, with comments on their fauna in other parts of the sub-arctic region, is followed by a series of examples from specific localities. These molluscan associations, while not necessarily typical, are believed to be representative. The study is concluded with a comparison of the molluscan fauna of northern North America with that of northern Eurasia.Three geographical elements in Canadian sub-arctic Mollusca are: a group of circumboreal species, a large number of strictly North American species, and a group characteristic of this region. An explanation of the close relation between the sub-arctic molluscs and those of the Mississippi drainage probably lies in the geological history of the region. There appears to have been a greater degree of speciation in North America than in northern Asia; the total number of species and varieties in sub-arctic Canada is 111, in northern Asia it is only 50. The explanation may lie partly in the richer source of supply, the greater facility for migration, and the wider range of habitats available in Canada. Thus new species as they arose would find suitable unoccupied habitats more readily. While this is hardly the sole explanation, the existence of some connection between physiography and speciation appears to be reasonable.

Gondwana and Pangea

2004 ◽  
Author(s):  
John J. W. Rogers ◽  
M. Santosh
Keyword(s):  
North America ◽  
South America ◽  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Late Paleozoic ◽  
Northern Asia ◽  
Pan African ◽  
History Of ◽  
Single Block ◽  
Orogenic Belts

Pangea, the most recent supercontinent, attained its condition of maximum packing at ~250 Ma. At this time, it consisted of a northern part, Laurasia, and a southern part, Gondwana. Gondwana contained the southern continents—South America, Africa, India, Madagascar, Australia, and Antarctica. It had become a coherent supercontinent at ~500 Ma and accreted to Pangea largely as a single block. Laurasia consisted of the northern continents—North America, Greenland, Europe, and northern Asia. It accreted during the Late Paleozoic and became a supercontinent when fusion of these continental blocks with Gondwana occurred near the end of the Paleozoic. The configuration of Pangea, including Gondwana, can be determined accurately by tracing the patterns of magnetic stripes in the oceans that opened within it (chapters 1 and 9). The history of accretion of Laurasia is also well known, but the development of Gondwana is highly controversial. Gondwana was clearly a single supercontinent by ~500 Ma, but whether it formed by fusion of a few large blocks or the assembly of numerous small blocks is uncertain. Figure 8.1 shows Gondwana divided into East and West parts, but the boundary between them is highly controversial (see below). We start this chapter by investigating the history of Gondwana, using appendix SI to describe detailed histories of orogenic belts of Pan-African age (600–500-Ma). Then we continue with the development of Pangea, including the Paleozoic orogenic belts that led to its development. The next section summarizes the paleomagnetically determined movement of blocks from the accretion of Gondwana until the assembly of Pangea, and the last section discusses the differences between Gondwana and Laurasia in Pangea. The patterns of dispersal and development of modern oceans are left to chapter 9, and the histories of continents following dispersal to chapter 10. By the later part of the 1800s, geologists working in the southern hemisphere realized that the Paleozoic fossils that occurred there were very different from those in the northern hemisphere. They found similar fossils in South America, Africa, Madagascar, India, and Australia, and in 1913 they added Antarctica when identical specimens were found by the Scott expedition.

A Short Outline of Skiing History1

2019 ◽  
pp. 13-14
Author(s):  
K. B. E. E. Eimeleus
Keyword(s):  
North America ◽  
Everyday Life ◽  
Mountain Regions ◽  
Altai Mountain ◽  
The West ◽  
Northern Asia ◽  
History Of

This chapter briefly details the history of skiing. It begins with skiing's ancient roots and how it was used in everyday life. From skiing's origins in the Baikal and Altai mountain regions, the chapter traces its spread through the nomadic peoples of Northern Asia. From there, skiing traveled east across the Bering Straits into North America and to the west into Sweden and Norway. In present-day Finland, using skis was common earlier than anywhere else in Europe. The ancient epic Kalevala makes clear that the Finns knew how to prepare and use skis early on and that the preparation and use of skis were known to the Finns long ago. Indeed, skiing has passed so deeply into Finland's concept of nationalism that it is an accepted truism that a Finn could catch any type of animal on skis.

Discovering the birds of Europe, I

2017 ◽  
Author(s):  
Henry A. McGhie
Keyword(s):  
Nineteenth Century ◽  
North America ◽  
Great Book ◽  
Personal Relationships ◽  
The Arctic ◽  
Museum Collections ◽  
Northern Asia ◽  
History Of

This chapter introduces the ‘History of the Birds of Europe’, a great book project initiated by Richard Bowdler Sharpe, in partnership with Dresser. The chapter discusses scientific travellers and fieldwork, and the growth of formal and informal scientific travel through the nineteenth century. It describes the collecting manuals and instructions for collectors that were issued to encourage collectors to produce good-quality specimens that could enter into exchanging networks and museum collections. The chapter explores Dresser’s collecting network by discussing the activities of those who provided him with specimens from Europe, Northern Asia, North America and the Arctic. It emphasises and explores his personal relationships with field collectors.

(A review). BRAUN-BLANQUETIA. Recueil de travaux de geobotanique / review of geobotanical monographs. Vol. 46. Centenaire de la phytosociologie. CAMERINO, 2010. 423 p.

2011 ◽  
pp. 143-147
Author(s):  
L. G. Naumova ◽  
V. B. Martynenko ◽  
S. M. Yamalov
Keyword(s):  
Plant Association ◽  
Northern Asia ◽  
The Third ◽  
International Botanical ◽  
International Botanical Congress ◽  
History Of ◽  
Definition Of

Date of «birth» of phytosociology (phytocenology) is considered to be 1910, when at the third International Botanical Congress in Brussels adopted the definition of plant association in the wording Including Flaó and K. Schröter (Flahault, Schröter, 1910; Alexandrov, 1969). The centenary of this momentous event in the history of phytocenology devoted to the 46th edition of the Yearbook «Braun-Blanquetia», which began to emerge in 1984 in Camerino (Italy) and it has a task to publish large geobotanical works. During the years of the publication of the Yearbook on its pages were published twice work of the Russian scientists — «The steppes of Mongolia» (Z. V. Karamysheva, V. N. Khramtsov. Vol. 17. 1995), and «Classification of continental hemiboreal forests of Northern Asia» (N. B. Ermakov in collaboration with English colleagues and J. Dring, J. Rodwell. Vol. 28. 2000).

Menapak Jejak Seni Gambuh dalam Naskah-Naskah Panji Melayu

2020 ◽  
Vol 11 (2) ◽  
pp. 139
Author(s):  
Priyo Joko Purnomo ◽  
Wahyudhi Wahyudhi
Keyword(s):  
Performance Art ◽  
Oral Tradition ◽  
Close Relation ◽  
Cultural Transformation ◽  
Historical Aspects ◽  
Historical Approach ◽  
University Library ◽  
Critical Method ◽  
History Of ◽  
Performing Art

Gambuh as the performing art in Malay area became one of the cultural transformation evidences of the close relation between Java and Malay. The history of gambuh performance in Malay area recorded in the archipelago’s manuscripts, one of them is a manuscript entitled Surat Gambuh which is being the collection of Leiden University Library. This paper attempts to examine the contents of the manuscript in order to reconstruct the gambuh performance art in Malay and also trace the historical aspects. As far as the research had been done, there have been no studies of this manuscript so it is necessary to first transliterate it using a critical method. Furthermore, the historical aspects are explored using a historical approach by adding data from other texts of Panji. The analysis result of the reflection of Malay gambuh performance rules and historical aspects show that there is a transformation of work from oral tradition to written tradition, the cultural acculturation between Java and Malay, and the Islamic influence behind Malay gambuh.

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.

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