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. , , , (Colbert, 1961; Simpson, 1968; Simpson, Beck, 1965; Van Valen, Sloan, 1977; Sloan et al., 1986*). , (Sloan et al., 1986*).
. , ; . , , , , . ; .
(Van Valen, Sloan, 1977*) -- () . , . ; . , , , . .
, , , . , , . , , , . -- , , 300 000 (Van Valen, Sloan, 1977; Sloan et al., 1986*).
, , . , , , (Van Valen, Sloan et al., 1977; Sloan et al., 1986*).
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, , (Axelrod, Bailey, 1968; Spotilla et al., 1973; Benton, 1979; Hallam, 1987*). , 130 . . .
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, (, ), (), (); . (Axelrod, Bailey, 1968*).