title: Preliminary Analysis of Phylogenetic Relationships of the Asian-Pacific Endemial Subterranean Amphipod Genus Pseudocrangonyx Among Families and Genera of Crangonyctoidean Amphipods Inferred by Partial LSU rDNA Gene Sequences.
abstract: To analyze the phylogenetic relationships of the genus Pseudocrangonyx within the superfamily Crangonyctoidea, we sequenced a partial LSU rDNA gene from four species (six specimens). The monophyly of Pseudocrangonyx and its affinity to Crymostygius were strongly supported by four reconstruction methods: neighbor-joining, minimum evolution, maximum-likelihood, and Bayesian inference. Current geographical distributions of the taxa studied and their phylogenetic relationships established in our study suggest that members of Pseudocrangonyctidae and Crymostygius diverged from a common Crangonyx-like ancestor in the Arctic Basin region of the northern hemisphere.
authors.affiliation: Institute of Biology and Soil Science, Far Eastern Branch of the Russian Academy of Sciences, Vladivostok 690022, Russia.
authors.forename: Dmitry A
authors.initials: DA
authors.lastname: Sidorov
authors.forename: Andrey A
authors.initials: AA
authors.lastname: Gontcharov
mesh_terms: D033304:Amphipoda / Q000235:genetics* / Q000502:physiology*; D000818:Animals; D004275:DNA, Ribosomal / Q000235:genetics*; D049810:Genetic Speciation; D010802:Phylogeny
chemical_list: D004275:DNA, Ribosomal
keywords: Amphipoda; Far East; LSU rDNA; Pseudocrangonictidae; Pseudocrangonix; phylogeny; stygobionts