Streaked Tuftedcheek (Pseudocolaptes boissonneautii) - HBW 8, p. 327

Taxonomy: Anabates Boissonneautii Lafresnaye, 1840, “Bogotá”.
Genus has no obvious close relatives; placement near Berlepschia based on bill shape and other morphological characters associated with climbing and probing, all possibly due to convergence; somewhat similar in general facial pattern and distinctive malar tufts to some Cinclodes, traditionally assumed to be distantly related. Forms a superspecies with P. lawrencii and sometimes treated, with some justification, as conspecific; in plumage colour, race auritus and that species are in many ways more similar to each other than either is to nominate race of present species; in addition, verbal descriptions of voice equivocal, and formal comparison of sonagrams may provide data for re-evaluation of taxonomy. Proposed race orientalis, from Ecuador, is a synonym of oberholseri; intermedianus possibly indistinguishable from latter, quantitative study needed. Proposed race pallidus, from NW Peru, described as paler below and having reduced back streaking, but these supposed characters do not distinguish it from nearby medianus. In Peru, allocation of San Martín and La Libertad populations to auritus is tentative, and specimens from Ayacucho and Cuzco show signs of intermediacy in colour of malar tuft and rump between that race and carabayae; also, latter possibly shows trend towards increasing dark scalloping on belly and darker rump colour farther S, but larger samples needed. Eight subspecies recognized.