`` Triisodon `` is the type genus of the family Triisodontidae , one of the three families within Mesonychia ( the other two being Mesonychidae and Hapalodectidae ) .
`` PROPN `` AUX DET NOUN NOUN ADP DET NOUN PROPN , NUM ADP DET NUM NOUN ADP PROPN ( DET ADJ NUM VERB PROPN CCONJ PROPN ) .