Foetal labial papillae. Labial papillae are forming during stage Ia (left) and are well developed at stage Ib (right). See foetal development for more information on developmental stages. Redrawn after Lamotte and Xavier (1972b).

  Part of: Sandberger-Loua L, Müller H, Rödel M-O (2017) A review of the reproductive biology of the only known matrotrophic viviparous anuran, the West African Nimba toad, Nimbaphrynoides occidentalis. Zoosystematics and Evolution 93(1): 105-133.