. . "Long-billed Gnatwren" . "Certhiidae" . "Aves" . "Ramphocaenus" . "Ramphocaenus melanurus Vieillot 1819" . "Animalia" . . "Vieillot 1819" . . . . . . . . . . "Ramphocaenus melanurus" . . . . "Passeriformes" . "Chordata" .