part of part of in taxon develops from develops from immediate transformation of Acipenser head anterior region of body mouth digestive system skeletal system face digestive tract jaw skeleton upper jaw region musculoskeletal system premaxilla http://upload.wikimedia.org/wikipedia/commons/4/4a/Gray160.png One of the bones of the upper jaw situated between and in front of the maxillae[VHOG]. FMA:77231 MA:0001493 Paired, intramembranous bones located at the anterior end of the skull; they form the anterior-most segment of the maxillary arch.[AAO] premaxillary (...) in all higher vertebrates a premaxilla is present (...) (reference 1); Although the presence of a tooth-bearing outer buccal arcade (premaxilla, maxilla, dentary) is cited as a common character of Osteichthyes, dipnoans lack all three bones (...) (reference 2).[well established][VHOG] os incisivum EHDAA:8033 UBERON:0002244 EMAPA:17641 requires checking embryonic vs adult; isa fetal organ part in FMA; adult bone of upper jaw in AAO and ZFA; split. Note that we have loops if we add develops_from UBERON:0005620 primary palate AAO:0000461 UBERON:0002253 relationship loss: overlaps premaxillary-maxillary joint (TAO:0002260)[TAO] EHDAA:6962 SCTID:308884009 incisive bone One of the bones of the upper jaw situated between and in front of the maxillae. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG] premaxilla bone Wikipedia:Incisive_bone relationship loss: overlaps mesethmoid-premaxillary joint (TAO:0001676)[TAO] ZFA:0000567 Dermal bone that forms the anteriormost element of the upper jaw. It articulates with the maxilla posterodorsally and its antimere medially. The premaxilla is paired.[TAO] TAO:0000567 VHOG:0000426 FMA:76869 premaxillary bone premaxillae relationship loss: overlaps inter-premaxillary joint (TAO:0001950)[TAO] intramembranous bone dermatocranium skull skeleton of upper jaw midface skeleton dermal bone neural crest-derived structure cranial skeletal system dermal skeleton axial skeletal system facial skeleton jaw region bone of upper jaw early premaxilla main body axis body proper embryonic craniocervical region