1910–1911
Britannica 11th
Encyclopaedia Britannica · 11th edition
TILLODONTIA, a group of mammals of uncertain position, typified by Tillotherium from the Middle Eocene of Wyoming, (From Marsh.) Skull of Tillotherium fodiens. (} nat. size.) and perhaps including Esthonyx from the Lower Eocene of the same district, and other genera from the same horizon in both North America and Europe. In Tillotherium the skull is decidedly rodent-like, with an elongated cranial and a short facial portion, and a small brain-cavity; the jugal bone occupying the middle of the zygomatic arch. The de…
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- Vol. 26, pp. 976-976