Ungulata

At the same time the differentiation of artiodactyle and perissodactyle forms existed as long ago as in the period of the Eocene ungulata, and that in a marked degree, as has been before observed. ❋ St. George Mivart (N/A)

However, it is especially with the rodents, the ungulata, and the ruminants that we find a highly developed practice of mutual aid. ❋ Petr Alekseevich Kropotkin (1881)

The mammalia, for example, were long thought to have first appeared in Tertiary times, where they are represented in some of the earlier deposits by all the great divisions of the class fully developed -- carnivora, rodents, insectivora, marsupials, and even the perissodactyle and artiodactyle divisions of the ungulata -- as clearly defined as at the present day. ❋ Alfred Russel Wallace (1868)

Within the last few years this has been done fully in the case of the horse, less completely in the case of the other principal types of the ungulata and of the carnivora; and all these investigations tend to one general result, namely, that, in any given series, the successive members of that series present a gradually increasing specialisation of structure. ❋ Thomas Henry Huxley (1860)

Take the mammalia, and it is in like manner found to be composed of five orders, -- the cheirotheria, {239c} ferae, cetacea, glires, ungulata. ❋ Robert Chambers (1836)

The rasorial type comprehends most of the animals which become domesticated and useful to man, as, first, the fowls which give a name to the type, the ungulata, and more particularly the ruminantia, among quadrupeds, and the dog among the ferae. ❋ Robert Chambers (1836)

With sanguinary, he has also gentle and domesticable dispositions, thus reflecting the characters of the ungulata, (the rasorial type of the class,) to which we perhaps see a further analogy in the use which he makes of the surface of the earth as a source of food. ❋ Robert Chambers (1836)