“Birthing posture” in Nimba toads. A: gestating Nimba toad; the grey shading indicates the size and position of the enlarged distal parts of the oviduct (uterus), B: shows the “birthing posture”, in which females build a double W with their legs and increase pressure on their uteri. Compare the position of legs on the photograph on the right (C) of a female giving birth, showing likewise the double W, of the legs. A and B are redrawn after Vilter (1956a).

  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. https://doi.org/10.3897/zse.93.10489