LampreysNorth AmericaPetromyzonSouth AmericaAmericasLatin AmericaCentral AmericaHagfishesPhylogenyNorth CarolinaEuropeNorth SeaGeographyFishesSuperior ColliculiPhysiology, ComparativeBiological EvolutionFossilsVena Cava, SuperiorPhylogeographyAsiaMolecular Sequence DataSequence Analysis, DNAGenetic VariationVertebratesSwimmingCanadaSpinal CordEvolution, MolecularMesenteric Artery, SuperiorPaleontologyNorth DakotaAnimal MigrationDinosaursReticular FormationEcosystemClimateSpecies SpecificityRadiometric DatingPopulation DynamicsPyrrolidonecarboxylic AcidLocomotionHistory, AncientDNA, Ribosomal SpacerBirdsUnited StatesAtlantic OceanChordata, NonvertebrateSuperior Vena Cava SyndromeTreesBase SequenceDNA, MitochondrialTime Factors