A cikin tetrapods, kashin mahaifa (masu ɗaya: vertebra ) sune kashin wuyan wuyansa, nan da nan ƙasa da kwanyar . Truncal vertebrae (rabu zuwa thoracic da lumbar vertebrae a cikin dabbobi masu shayarwa ) kwance caudal (zuwa wutsiya) na mahaifa na mahaifa. A cikin nau'in sauropsid, ƙwanƙarar ƙwayar mahaifa tana ɗauke da haƙarƙarin mahaifa . A cikin kadangaru da dinosaurs na saurishian, haƙarƙarin mahaifa suna da girma; a cikin tsuntsaye, ƙananan su ne kuma gaba ɗaya sun haɗa su zuwa kashin baya. Hanyoyin juzu'i na vertebral na dabbobi masu shayarwa sun yi kama da hakarkarin mahaifa na sauran amniotes .[ana buƙatar hujja] shayarwa suna da kashin mahaifa guda bakwai, tare da sani guda uku kawai da aka sani sune manatee mai shida, sloth mai yatsu biyu tare da biyar ko shida, da ramin ƙafa uku tare da tara. A cikin mutane, ƙananan ƙwayar mahaifa sune mafi ƙanƙanta na gaskiya kuma za'a iya bambanta su da sauri daga yankunan thoracic ko lumbar ta hanyar kasancewar wani nau'i (rami) a cikin kowane tsari mai juyayi, ta hanyar da vertebral artery, vertebral veins, da ƙananan baya . cervical ganglion wuce.