[Title Page] [List of
Genera] Comparison of Drawings] [Regional
Keys to Genera] [Descriptions of New Taxa] [Geographical
Distribution] [Color Photographs]
[Scanning Microphotographs] [See also
Catalogue of Salticidae] [See: Hypotheses on evolution
of geographic distribution in Salticidae]
Salticidae: Diagnostic Drawings Library Supplement
by Jerzy Proszynski 2001
Diagram of intensive speciation areas hypothesis
Speciation is intensive in most favorable areas (I, II, III,
for instance in tropical mountains) but size of areals of species is limited,
presumably by ecological conditions and competition. Some more enterprising
species penetrate into less favorable zones and, meeting less competition, expand
over larger areas. Single most enterprising species, capable to endure unfavorable
condditions, or entering land free of competitors, spread over very large areas
of continental dimensions. The example of the latter may be Euro-Siberian areals
of Evarcha arcuata, E. falcata and E. latebunda.
Copyright © for the page by J. Proszynski, 2001.
Source: Proszynski J. 1986a. Remarques sur la composition de la faune europeenne, sa repartition et son origine basees sur les etudes des Salticidae. Mem. Soc. r. belge Ent., Bruxelles, 33: 165-170, 4 tt. With Author's and Editor's permission.