Analysis of information sources in references of the Wikipedia article "Comparative embryology" in English language version.
5.5.5 Evolutionary embryology and the search for vertebrate ancestors
The 1870s and early 1880s were an active and exciting time for those involved in the classification and ordering of animals, in comparative embryology and in forging an evolutionary embryology. The grand schemes of animal classification that emerged then are, by and large, with us today. Much energy went into searching for ancestors.
Comparative embryology offered not only powerful arguments in support of a branching order of nature, but also powerful insights into the deep relationships between natural groups of organisms such as reptiles, birds, and mammals. In fact, Darwin found comparative embryology to offer a key to the recognition of common ancestry.
