First Described (Guide)
Whitney & Alvarez Alonso, 1998
Habitat
Canopy and subcanopy of humid tropical forest, and apparently restricted to terra firme forest growing on nutrient-poor podzolic or quartzitic soils, as well as on high, dry ridgetops. From sea-level - 200 m.
Ancient Antwren (gentryi) [XC195122]
by Niels Poul Dreyer from Tierra Blanca, Loreto, Peru (song)
Ancient Antwren (gentryi) [XC270725]
by Peter Boesman from Allpahuayo - Mishana Reserve, Loreto, Peru (song)
Subspecies
Appears to form a superspecies with Todd's Antwren (Herpsilochmus stictocephalus). Similarity of vocalizations have suggested to some that both are closely related to the Bahia Antwren (Herpsilochmus pileatus) group.