Interhippus Ameghino
Interhippus Amegh., 1904, Anal. Mus. Nac. Buenos Aires, ser. 3, t. 3, p. 183.
Interhippus Amegh., 1904, Anal. Soc. Cienc. Argen., t. 56, p. 34 of reprint.
This genus was established on isolated teeth which closely resemble those of this family, though the genus was placed among the Rhynchippidae by Ameghino. The teeth described as molars are much elongated and have the cristae greatly developed, and in one species there is a style rising about the middle of the inner side of the molar. Another feature emphasized as characteristic of this and the next genus is, that the crowns are expanded much wider than the roots. While there is not yet enough direct evidence to prove it, I feel that this and the next genus will prove to be deciduous teeth, of either Proadinotherium or some related genus. Two species of this genus have been described, both from the upper Deseado.
I. phorcus Amegh., loc. cit. above.
This species is characterized by its size, the last upper molar (so called) measuring 16 mm. long by 14 mm. wide.
I. deflexus Amegh., 1904, Anal. Mus. Nac. B. A., ser. 3, t. 3, p. 183.
This species is based on a worn tooth designated as molar 1 (probably d. pm. 3) 14 mm. long by 19 mm. wide.
Fig. 84. I. phorcus.
“Upper molar 3”—
natural size,
after Ameghino.
Fig. 85. I. deflexus,
“Upper molar 1”—
natural size,
after Ameghino.
Fig. 86. N. insulatus,
“Upper molar 1”—
natural size,
after Ameghino.