"Pearly Antshrike" . "Chordata" . . "Megastictus margaritatus" . "Aves" . . . . "(Sclater 1855)" . "Megastictus" . . . . . "Thamnophilidae" . "Animalia" . . . "Passeriformes" . . "Megastictus margaritatus (Sclater 1855)" . . . .