Lower tusks of <i>Cuvieronius</i>, <i>Rhynchotherium</i> and <i>Gomphotherium</i>.

<p>(A) Radical fragment of a right lower tusk (MNPA-V 005867) of <i>C</i>. <i>hyodon</i> from Tarija. This is the sole recent picture (taken in 2003) of a lower tusk of <i>Cuvieronius hyodon</i>. The specimen is at present (2015) missing. (B) Juvenile specimen of <i>Rhynchotherium</i>, F:A.M. 18216, with small lower tusks, from California, USA; (C) Lower deciduous tusk of new born <i>Gomphotherium</i>, (uncatalogued), from Nebraska, USA. Note the slightly inflated and wrinkled enamel cap. (D) Lower tusks of a juvenile <i>Gomphotherium</i>, specimen F:A.M. 21112, from Santa Fé, New Mexico, USA. The arrows indicate the enamel band on the lower tusks. Scale bar = 1 cm.