Since the early 1970s, at least 16 species of spiders in 10 families have either been recorded previously in Alberta, or are being recorded in this paper for the first time as introduced. Most of these introductions represent spider species that do not exist naturally in Alberta; but some are ones that do exist naturally, that is, are precinctive to Alberta, but only in the most southeastern part, but not in Edmonton where they were collected. Aprecinctive species, genus, family or group is one thatis confined to the geographic area under discussion (Sharp 1900; Frank & McCoy 1990).
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