The lineated foliage-gleaner (Syndactyla subalaris) is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae.

Juveniles are generally brighter overall than adults, with a blacker cinnamon-streaked crown, a more reddish brown back, black speckles on the chin, a more ochraceous cinnamon supercilium, neck, and breast, richer brown flanks, and cinnamon-brown undertail coverts.

[5][7][8] Subspecies S. s. lineata has a paler but more rufescent back than the nominate, a heavily marked buffy yellow throat, and slightly more olivaceous underparts with thinner streaks.

S. s. tacarcunae is similar to lineata but with a darker more olive-brown back, a paler more yellowish throat, and grayer underparts.

Its subspecies are found thus:[2][5] The lineated foliage-gleaner inhabits evergreen forest in the subtropical and foothill zones of its mountain ranges.

[5] The lineated foliage-gleaner feeds mostly on arthropods including insects and spiders, and occasionally on small vertebrates like frogs and lizards.

It typically forages singly or in pairs and readily joins mixed-species feeding flocks.

It gleans and probes for its prey among live and dead leaves, debris, moss, and epiphytes while climbing along large branches and vines.

The only fully described nest was a cup of soft fibers on a twig platform, built in a hole in a tree and containing two eggs.