Recent molecular phylogeny indicated sister relationship between present species and P. cirratus#R. Closely related also to P. dorbignyanus, and sometimes treated as conspecific with P. cirratus or, alternatively, with both. Hybridizes frequently with nominate cirratus, producing many intermediate individuals; occasionally interbreeds with race guttifer of P. albosquamatus. Monotypic.
E Paraguay, NE Argentina (Misiones) and SE Brazil (São Paulo S to Rio Grande do Sul).
Food and feeding
Status and conservation
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