title: Patterns of evolutionary change in Baikalian gammarids inferred from DNA sequences (Crustacea, Amphipoda).
abstract: The Baikalian gammarids (Crustacea, Amphipoda) are the most widely known and most spectacular example of an adaptive radiation among contemporary freshwater invertebrates. To study the phylogeny of the Baikalian gammarids we sequenced a 622-bp-long fragment of the nuclear gene coding for 18S rRNA from species of 18 endemic Baikalian genera and Gammarus pulex-a non-Baikalian taxon. Some important morphological characters appear independently in both lineages and suggest parallelism in the development of gigantism and body armament. The first lineage comprises benthic, mostly unarmed taxa. The second lineage contains predominantly armed taxa, most of which are detrivorous or carnivorous.
authors.affiliation: Limnological Institute, Siberian Branch of Russian Academy of Sciences, Irkutsk, 664033, Russia.
authors.forename: D Y
authors.initials: DY
authors.lastname: Sherbakov
authors.forename: R M
authors.initials: RM
authors.lastname: Kamaltynov
authors.forename: O B
authors.initials: OB
authors.lastname: Ogarkov
authors.forename: E
authors.initials: E
authors.lastname: Verheyen
mesh_terms: D000818:Animals; D001483:Base Sequence; D005075:Biological Evolution; D003445:Crustacea / Q000235:genetics*; D014644:Genetic Variation; D008969:Molecular Sequence Data; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000235:genetics*; D012689:Sequence Homology, Nucleic Acid; D012800:Siberia
chemical_list: D012337:RNA, Ribosomal, 18S