part_of part of part of in lateral side of in_lateral_side_of develops_from develops from develops from existence starts during immediate transformation of gastrula stage embryo paraxial mesoderm http://upload.wikimedia.org/wikipedia/commons/6/64/Gray19_with_color.png XAO:0000259 NCIT:C34244 ZFA:0000255 uberon AAO:0010568 mesoderma paraxiale EMAPA:16183 somitic mesoderm EFO:0003515 UMLS:C1284009 The paraxial mesoderm is the mesoderm located bilaterally adjacent to the notochord and neural tube[GO]. note that all AOs differ in the relationship between this structure and the mesoderm; in ZFA it is a subclass (and this is implied by the GO definition and GO relationships), in AAO it is part of, and in EHDAA2 it develops from the mesoderm (but in EHDAA2 the naming convention is to use 'paraxial mesenchyme', rather than 'paraxial mesoderm'). Also in ZFA it is part of the trunk whereas this conflicts with the division into head and trunk in ehdaa2 (which we follow here) paraxial mesenchyme Wikipedia:Paraxial_mesoderm The paraxial mesoderm is the mesoderm located bilaterally adjacent to the notochord and neural tube[GO] Mesoderm lateral to the neural tube and notochord that is divided into cranial and post-cranial portions. The trunk portions further segment into somites.[AAO] EMAPA:16751 FMA:293145 TAO:0000255 Presently, Cephalochordata, Urochordata, and Vertebrata are placed as subphyla of the phylum Chordata, in which the overall organization of embryonic tissues (dorsal hollow nerve cord, ventral digestive tract, axial notochord, and bilateral paraxial mesoderm) is largely conserved. In contrast, the echinoderms and hemichordates are sister groups of the chordates and they lack the notochord and paraxial mesoderm. Thus, the basic mesodermal organization of vertebrates must have appeared first in the common ancestor of the chordates.[well established][VHOG] UBERON:0003077 VHOG:0000114 SCTID:361475002 mesoderm-derived structure embryonic tissue presumptive paraxial mesoderm dense mesenchyme tissue lateral structure