Possible human homologues (MIM numbers): 182940 (trait) , 206500 (trait) , 301410 (trait) , 619452 (trait)

Cross-species summary: Congenital absence of the cranial vault, with the cerebral hemispheres completely missing or reduced to small masses. This phene was originally called anencephaly, but a recent review suggested that the term anencephaly/exencephaly is more appropriate.

Species in which this phene is found:
greater Indian rhinoceros (Rhinoceros unicornis)
cattle (Bos taurus)
sheep (Ovis aries)
Indo-pacific bottlenose dolphin (Tursiops aduncus)