The fossil lungfish Diabolepis shows an intermediate stage between posterior and interior nostril and supports the independent origin of internal nostrils in the lungfish.
posterior | Posterior probability | Labiodental nasal | Posterior communicating artery | Posterior (anatomy) | Posterior | Nasal voice | nasal spray | Nasal scale | Nasal irrigation | Nasal congestion | nasal congestion | Afrin (nasal spray) |