Henricofilholia Ameghino

Henricofilholia Amegh., 1901, Bol. Acad. Nac. Cordoba, t. 16, p. 404.

The type species is H. cingulata, based on a single upper molar. In general the upper molars are similar to those of Leontinia, but more brachydont, and with the internal cingulum well developed and tending to be crenulated. Four species have been made, all based on isolated upper molars.

Henricofilholia cingulata Ameghino

Fig. 90. H. cingulata,
upper molar 1—
natural size,
after Ameghino.

This is based on an upper molar 1 of which I reproduce Ameghino’s figure. It measures 28 mm. long by 29 mm. wide.

H. lustrata Amegh., 1901, Bol. Acad. Cienc. Cordoba, t. 16, p. 405.

This species is smaller than the preceding, and is based on an upper molar 1 and a last lower molar. The measurements are as follows:

Upper molar 1,length25 mm.,width25 mm.
Lower molar 3,length 25 mm.,width 12 mm.

Fig. 91. H, inaequilatera, upper molars 3 and 4—
natural size, after Ameghino.

H. inaequilatera Amegh. loc. cit. above.

This species is larger than the preceding with the internal cingulum more developed. Upper molar 2 measures 30 mm. long by 29 mm. wide.

H. circumdata Amegh., loc. cit. above.

This is a still larger type, with the internal cingulum enormously developed. Upper molar 1 measures 42 mm. long by 36 mm. wide.

CHAPTER X
Homalodontotheria

The forms making up the Homalodontotheria are characterized by a dentition which is clearly a derivative of that of Toxodontia, but is distinguished by the teeth being brachydont, by the canines being the teeth which tend to become tush-like, though not advancing to a marked degree. But the distinctive feature of the suborder is found in the feet, which are clawed, the ungual phalanges being deeply cleft; and further, the animals seem to have walked on the sides of the foot, suggesting the Ancylopoda; but there does not seem to have been a phylogeretic relationship, rather it is a case of parallel development. Most of the forms found are of considerable size, and they are relatively scarce in all the formations.

The representatives of the group in the Deseado all belong to the genus Asmodeus, which seems to be directly ancestral to the Santa Cruz genus Homalodontotherium, which seems to be the last representative of the series, no specimens, referable to the suborder having been found in later beds.