molecular phylogeny of south american screech owls of the otus atricapillus complex (aves: strigidae) inferred from nucleotide sequences of the mitochondrial cytochrome b gene. | the cytochrome b gene of 6 south american screech owls of the genus otus (o. choliba, o. atricapillus, o. usta, o. sanctaecatarinae, o. guatemalae, and o. hoyi) and two old world species (otus scops and otus leucotis) was amplified by polymerase chain reaction (pcr) and partially sequenced (300 nucleotides). otus atricapillus, o. guatemalae, o. hoyi and o. sanctaecatarinae which are morphologically very similar, have been treated as belonging to a single species. a. atricapillus (sibley and monr ... | 1995 | 7766262 |