SlothsPhocoenaVertebratesAnatomy, ComparativePaleontologyDinosaursFossilsJawBiomechanical PhenomenaPulmonary Stretch ReceptorsSkullFeeding BehaviorPredatory BehaviorModels, AnatomicLocomotionBiological EvolutionMicroscopy, Electron, ScanningSpecies SpecificityPhylogenyZebrafishMolecular Sequence DataGene Expression Regulation, DevelopmentalEvolution, MolecularAmino Acid SequenceEmbryo, NonmammalianZebrafish ProteinsChordata, NonvertebrateFishesBody PatterningLampreysBase SequenceReptilesSequence Homology, Amino AcidHagfishesInvertebratesIn Situ HybridizationSequence AlignmentMorphogenesisHomeodomain ProteinsXenopus ProteinsConserved SequenceChickensChick EmbryoAnimals, Genetically ModifiedAmphibiansChordataSharksMutationOryziasDrosophila ProteinsTakifuguCiona intestinalisTranscription FactorsPhenotypeGene DuplicationXenopusDrosophilaCloning, MolecularMammalsGenomeSignal TransductionPetromyzonLizardsGenes, HomeoboxMicroscopy, ElectronModels, BiologicalLarvaXenopus laevisUrochordataBirdsMesodermPhotoreceptor Cells, VertebrateCell DifferentiationExtremitiesFish ProteinsDNA, ComplementarySyntenyNeuronsTetraodontiformesSequence Analysis, DNADrosophila melanogasterRhombencephalonRNA, MessengerNervous SystemAvian ProteinsGastrulaNerve Tissue ProteinsCells, CulturedEmbryonic DevelopmentTime FactorsRetinaCell LineEctodermNeural CrestImmunohistochemistryDNA-Binding ProteinsTurtlesMembrane ProteinsMicroscopy, Electron, TransmissionEye