Developing eggs of Mantella aurantiaca.
File 1) Newly deposited eggs (8 hours).
File 2) After 48 hours development.
File 3) After 120 hours development.
File 4) After 170 hours development (starting to hatch).
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See: Vences, M. (2009). Comparative larval morphology in Madagascan frogs of the genus Mantella (Amphibia: Mantellidae). Zootaxa, 2124, 21-37. http://www.mvences.de/p/p1/Vences_A162.pdf