ðə bˈoʊn fˈɔːɹmz ɐn ænsˈɛstɹəl kəmpˈoʊnənt ʌvðə dˈɜːməl ɹˈuːf ænd ɪz tˈɪpɪkli θˈɪn kəmpˈɛɹd tʊ ˈʌðɚ skˈʌl bˈoʊnz.
The bone forms an ancestral component of the dermal roof and is typically thin compared to other skull bones.