InvertebratesVertebratesBone and BonesEchinodermataSpectrinMolluscaMolecular Sequence DataCnidariaPhylogenySkullCrustaceaUrochordataChordata, NonvertebrateAquatic OrganismsBiological EvolutionAmino Acid SequencePolychaetaFossilsBivalviaBone DevelopmentAnnelidaPoriferaArthropodsFacial BonesAnthozoaEvolution, MolecularCiona intestinalisPhotoreceptor Cells, InvertebrateLarvaGastropodaGanglia, InvertebrateSpecies SpecificityErythrocyte MembraneGene Expression Regulation, DevelopmentalInsectsMarine BiologyDrosophila melanogasterSea CucumbersSequence Homology, Amino AcidEcosystemLymnaeaSex Determination by SkeletonPaleontologyAmphipodaOligochaetaPaleopathologyHemocytesFood ChainInvertebrate HormonesDrosophila ProteinsBase SequenceCaenorhabditis elegansChordataDrosophilaSequence AlignmentBody PatterningHydrozoaCephalopodaDinosaursEmbryo, NonmammalianBrachyuraSea UrchinsFishesSpineOceans and SeasModels, BiologicalBryozoaOsteogenesisMytilusDaphniaRibsSnailsIn Situ HybridizationAstacoideaCalcification, PhysiologicAnkyrinsHorseshoe CrabsCalcium CarbonateCartilageThoracicaHumerusCytoskeletonLeechesCloning, MolecularBiodiversityZebrafishRotiferaMembrane ProteinsMorphogenesisOctopamineNephropidaePlatyhelminthsSeawaterSignal TransductionDNA, ComplementaryConserved SequenceInsect ProteinsHemolymphIsopodaBiomphalaria