Petrochelidon fuliginosa The forest swallow (Atronanus fuliginosus) is a little-known species of swallow in the family Hirundinidae, found in Cameroon, Republic of the Congo, Equatorial Guinea, Gabon, and Nigeria.

This outcome led De Silva et al. (2018) to document and describe formally a distinct, generic-level lineage of swallow endemic to the Lower Guinean forest region of central Africa.

De Silva et al. (2018) proposed to recognize the distinctiveness of this taxon at the generic level.

This species was originally described in the genus Lecythoplastes (Chapin, 1925) with Preuss's cliff swallow Petrochelidon preussi.

As such, Lecythoplastes must remain submerged in Petrochelidon; therefore De Silva et al. erected a new genus, Atronanus, comprising the monotypic forest swallow.