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Brauer, A., 1910. Embryonen des afrikanischen Rhinoceros. Sitzungsberichte der Gesellschaft Naturforschender Freunde zu Berlin 1910: 389-391, fig. 1

  details
 
Location: World
Subject: Morphology - Embryo (Foetus)
Species: Black Rhino


Original text on this topic:
Embryo of Diceros bicornis shot in Karagweh, Tanzania, in Mus Berlin. Mother killed in 1908 in Karagweh, place called Weranjange
The embryo is well preserved. It is only 3.25 cm long, totally without pigment, and the Chorion (with a long diameter of 21 cm) does not show any folds [Zotten]. As far as I know, such a young stage of development was not known earlier.
Despite the young age, the embryo shows several characters which let us recognize it as a rhinoceros. The feet already show their typical build, even though the soles are still undeveloped, i.e. the three toes of which the middle one is the larger. Further, the very characteristic part on the nose, where later the first horn grows. We can also mention the shape of the ear, which is folded ventrally, the nose, the wide lower jaw and the long tail.
A second embryo also killed in North Karagwe is much older, 27 cm long and already shows an entire rhinoceros, except for the horns and other characters which only develop after birth. The feet have their nails, the skin is folded, it is pigmented and even the places where the horns will grow are clearly marked, although there is no sign of them yet.

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