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Show 29 environments By using a other than combination sal, and tion patterns, environment of as their those the criteria information is more route probable origin, in. evolved ancestors of disper explaining distribu in and gained greater flexibility provided. The the as Holarctic the Idaho and the latter the as Vancouveran, Canadian, The Alleghenian. and were for selected The species has been distributional assigned used names They the at to into divided convenience. (Table 1) tabular summary the each is are end one to The austral fauna. an Cascadian, Columbian, austral fauna Sonoran and Sonoran Montane. in either referred former boreal fauna is herein divided into five types: evolved mayflies Neotropical realms; or fauna boreal a of ancestors of of two are and types: arbitrary also used this these in chapter where distribution types. The Boreal Fauna Vancouveran.- distributional origin and type to have The The are ancestors down representatives species having this to have believed dispersed of of the had this faunal group north. are mostly geographically widespread, fairly cated apparently wide common environmental tolerances. by having successfully northern Rocky Mountains from the with a crossed wide land This today species is indi barriers with |
