(Girard, Victor 1971) carefully reviewed the evidence for Pano-Tacanan and concluded it is suggestive but insufficient. Later dicta (Adelaar, Willem F. H. and Muysken, Pieter C. 2004):419 and re-examinations (Ribeiro, Lincoln Almir Amarante 2003), (Zariquiey Biondi, Roberto 2014) provided stronger evidence for Pano-Tacanan (cf. (Fleck, David W. 2013)) but not (yet) conclusive. Yora is mutually intelligible with Yaminahua (Shepard, Jr., Glenn H. 1999):32-42. The minuscule wordlist in Palau, Mercedes and Saiz, Blanca 1989  of Chiriva (Hervas, Lorenzo 1784):250 is probably Panoan.