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________________________________________ family Strigidae, a class of interest for evolution ADRIAN HARWOOD ABSTRACT This motif main usance is to compare and find out how distantly related The free radicals of Strigidae are from Tytonidae (both families belonging to the group order order Strigiformes) using the design MEGA and the website CNDI. The results were that members of Tytonidae diverged early from Strigidae. It is in like manner clear that there is curt or no learning on owls of Africa, South the States and Australia. This is most apparent when between 109 and 143 species belongs to this group and there was and information on 24 species of this group. Only heller motif establish on modern phylogenetic methods go been produce so far for owls. Cracraft proposed an avian motley based on a phylogenetic (cladistic) approach. He recommended that owls be considered a superfamily (Strigoidea, with the single(a) family Strigidae, including Tyto) within the order Falconifomes. Sibley et al. had a different opinion, which was proposed on the landed estate of distance analysis of DNA-DNA hybridization data. In their smorgasbord, Falconifomes and Strigifomes appear distantly related. The order Strigifomes was divided into three suborders (Strigi, Aegotheli and Caprimulgi).

________________________________________INTRODUCTION The order strigifomes is currently subdivided into two living families: Tytonidae, with two genera and 10 species, and Stigidae, with 22 genera and 109-143 species depending on the classification used by different authors (Clark et al. 1978, Wetmore1960, Storer 1971,Randi et al. 1991). Both taxonomy and phylog enetic relationships of the Strigiformes are! uncertain, and different opinions have been expressed. Only two paper based on modern phylogenetic methods have been support so far for owls. Cracraft (1981) proposed an avian classification based on a phylogenetic (cladistic) approach. He recommended that owls be considered a superfamily (Strigoidea,...If you pauperism to get a full essay, order it on our website: OrderEssay.net

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