| small subunit ribosomal rna genes of tabanids and hippoboscids (diptera: brachycera): evolutionary relationships and comparison with other diptera. | the small subunit ribosomal rna (ssu rrna) genes of hippoboscid (ornithoica vicina walker) and tabanid (chrysops niger macquart) diptera were sequenced to determine their phylogenetic position within the order and to determine whether or not extensive hypervariable regions in this gene are widespread in the diptera. a parsimony analysis of an alignment containing 8 dipteran sequences produced a single most parsimonious tree that placed o. vicina as sister group to drosophila melanogaster meigen. ... | 1998 | 9835693 |