Lichno moe mnenie, chto obrazovanie vidov idet skoree ne putem sozidaniya, a putem vymiraniya, imeetsya v vidu vymiranie promezhutochnyh form. Naprimer, imeyutsya kozy i ovcy i gde-to eshe kozlobarany. Do teh por, poka kozlobarany ne vymrut, eti kozlobarany, ovcy i kozy sostavlyayut odin vid, a kogda vymrut vot vam i dva novyh.

Na etom forume ne vizhu dereva soobshenii, tak chto eto ya v verhnem soobshenii V.M.Hmel'nikovu otvetil.