Colpocephalum gracile Piaget, 1880: 555, pl. 46: fig. 5.
Colpocephalum gracile Piaget, 1880; Harrison 1916: 49.
Actornithophilus gracilis (Piaget, 1880); Hopkins & Clay, 1952: 21.
Actornithophilus gracilis (Piaget, 1880); Clay 1962: 202, 242.
Actornithophilus gracilis (Piaget, 1880); Price et al. 2003: 83.
Actornithophilus gracilis (Piaget, 1880); González-Acuña et al. 2008b: 38, fig. 2.
Syntypes ♂ N in NHML (see Clay 1951a: 181).
Type host: “ Platalea alba Scopoli, 1786 ”, in error (see Clay 1962: 242).
Chilean host: Vanellus chilensis chilensis (Molina, 1782).
Other host: Vanellus vanellus (Linnaeus, 1758).
Chilean localities: Dalcahue (Chiloé): Region X; Chillán: Region XVI.
Geographic distribution: Eurasia; Central and South America; northern Africa.
Chilean references: González-Acuña et al. (2008b); this catalogue.
Other significant references: Clay (1962); Price et al. (2003).
Remarks: Dalcahue (Chiloé) is a new locality record for Actornithophilus gracilis in Chile, based on specimens from Vanellus chilensis chilensis held in NHML (Shchedrina et al. 2017).