Caenolestinae

The subfamily is distinguished by the formula

pm. 4 not being enlarged, and the lower molars being turberculo-sectorial. In the Deseado formation this group is only represented by a single species, based on a single tooth found by Ameghino.

Pseudhalmarhiphus guaraniticus Ameghino

P. guaraniticus Amegh., 1903, Anal. Mus. Nac. Buenos Aires, ser. 3, t. 2, p. 83.

Based on a single tooth, similar to those found in the Santa Cruz.