Lipeurus annulatus Piaget, 1880: 340, pl. 27: fig. 10.
Lipeurus potens Kellogg & Kuwana, 1902: 477, pl. 30: fig. 1.
Esthiopterum annulatum Piaget, 1880 [sic]; Harrison 1916: 130.
Pectinopygus jamaicensis Thompson, 1948b: 348, figs 1–8.
Pectinopygus annulatus (Piaget, 1880); Hopkins & Clay 1952: 268.
Pectinopygus paralellus Eichler, 1954: 37.
Pectinopygus paralellus Eichler, 1954; Weidner 1966: 260.
Pectinopygus annulatus (Piaget, 1880); Clay 1973: 219.
Pectinopygus annulatus (Piaget, 1880); Price et al. 2003: 207.
Pectinopygus annulatus Piaget, 1880); Palma 2017: 155.
Lectotype ♂ in NHML (see Clay 1973: 219). Holotype ♂ of Pectinopygus paralellus in ZMHG (see Weidner 1966: 260).
Type host: Sula leucogaster (Boddaert, 1783).
Chilean host: Sula variegata (Tschudi, 1843).
Other hosts: Sula leucogaster plotus (J.R. Forster, 1844); Sula dactylatra tasmani van Tets, et al. 1988; Sula granti Rothschild, 1902.
Chilean locality: Antofagasta: Region II.
Geographic distribution: Tropical and subtropical Atlantic, Indian and Pacific Oceans.
Chilean references: Eichler (1954); Weidner (1966).
Other significant references: Thompson (1948); Clay (1973); Palma (1996: 198); Price et al. (2003); Hughes et al. (2007: 238, 240, 244, 246, 249); Palma & Peck (2013: 41); Rivera-Parra et al. (2014: 571); Palma (2010: 408); Palma (2017).
Remarks: Ruz & Toro (1968: 135) recorded Perineus on Sula variegata, but this is most likely a misidentification of Pectinopygus annulatus, because no species of Perineus parasitises any species of Sula or any other member of the family Sulidae (Palma & Pilgrim 1988).