Sternarchogiton porcinum
It is native to deep river channels in the Río Huallaga , Río Napo , and Río Amazonas in Peru , and in the Río Orinoco in Venezuela . 
<triplet> Río Huallaga <subj> river <obj> instance of <subj> Peru <obj> country <triplet> Río Napo <subj> river <obj> instance of <subj> Peru <obj> country <triplet> Río Amazonas <subj> Peru <obj> country <triplet> Peru <subj> Río Amazonas <obj> contains administrative territorial entity <triplet> Río Orinoco <subj> river <obj> instance of <subj> Venezuela <obj> country