934 



EOCENE AND OLIGOCENE TITANOTHERES OF MONGOLIA 



Telmatherium berkeyi Osborn, 1925 



Original reference. — Osborn, H. F., Upper Eocene 

 and lower Oligocene titanotheres of Mongolia: Am. 

 Mus. Novitates No. 202, 1925. 



FiGUKE 789. — Tj'pes of Telmatherium and of Dolichorhinus from the Irdin Manha and 

 Shara Murun formations 



A, Type female jaw of Telmatherium berleyi (Am. Mus. 20106), one-eighth natm-al size; B, cranium of Dolichorhinus 

 kaisem (Am. Mus. 20252), left lateral aspect, after restoration, one-sixth natural size; Bi, superior view of same 

 cramum (Am. Mus. 20252), showing the tubular cavities lying beneath the cranial surface, as exposed before 

 complete restoration of the top of the skull, one-sixth natural size. 



Type locality and geologic level. — The type of 

 Telmatherium herleyi (Am. Mus. 20106), consisting 

 of adult female lower jaws, right maxilla, canines, 



and grinders, and the paratype (Am. Mus. 20107), 

 anterior half of jaw, canine, and inferior grinders, 

 are both from the Irdin Manha formation, 1 mile 

 south of the Kalgan-Urga telegraph Hne. This lo- 

 cality yielded also the palate 

 and superior grinders (Am. 

 Mus. 20127) and the juvenile 

 lower jaw with incisors and 

 grinder (Am. Mus. 20115). 

 The other paratype (Am. Mus. 

 20121). a perfect left maxilla 

 with grinding teeth, comes 

 from the same formation but 

 from a locality 2 miles north 

 of the Kalgan-Urga telegraph 

 line. 



Materials. — The materials 

 referable to Telmatherium 

 berlceyi, listed in the table on 

 page 915, were discovered at 

 three localities north and south 

 of the Kalgan-Urga telegraph 

 line, in the Irdin Manha for- 

 mation. They consist of seven 

 specimens altogether, found in 

 association with remains of 

 Protitanotherium grangeri. 

 This fact would indicate that 

 although T. her]ceyiwa.s eunuch 

 larger and probably a longer- 

 limbed form and had different 

 feeding habits, it frequented 

 the same general region as P. 

 grangeri. This inference is in 

 accord with the fact that Tel- 

 matherium and Manteoceras 

 occur in northern Utah in 

 similar geologic formations, 

 although they probably occu- 

 pied a dissimilar local habitat. 

 General characters. — As in- 

 dicated in the generic analysis 

 of Telmatherium above, one 

 could not for a moment mis- 

 take the extremely deep- jawed, 

 bathygnathic Telmatherium 

 ierlceyi, with deeply depressed 

 mental region or chin, for its 

 relatively shallow-jawed con- 

 temporary Protitanotherium 

 grangeri or for its extremely 

 shallow-jawed contempo- 

 rary Dolichorhinus olseni. In 

 fact, the elongate jaw of T. berlceyi, measuring 30 

 inches from condyle to symphysis, nearly 9 inches 

 in its deepest portion below m2, mj, and 7}^ inches 



K 



