has part has part has_part characteristic of abnormal fontanelle morphology abnormal cranial suture morphology Wormian bones 2017-07-24T15:07:20Z MP:0030030 presence of small extra bone segments, usually of irregular shape and variable size, arising in fontanelles and/or adjacent to or along the cranial sutures, and formed from additional and separate centers of ossification of the cranium; in humans, Wormian bones are most frequently located in the lambdoid or coronal suture, and have been seen in the fontanelles, particularly the posterior fontanelle intrasutural bones islands of bone within cranial sutures or fontanelles extra bones within cranial sutures intra sutural bones supernumerary skull bones accessory skull bones fontanelle cranial suture