Synonyms: Bathyalopex abbreviatus, Bathyalopex plumbeus, Chimaera abbreviata, Chimaera affinis, Chimaera plumbea, Hydrolagus cf. affinis, Psychichthys affinis
Common name: Smalleyed rabbitfish
Original description species: (De Brito Capello, 1868)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera africana, Hydrolagus cf. africanus
Common name: African chimaera
Original description species: (Gilchrist, 1922)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Hydrolagus cf. alberti
Original description species: Bigelow & Schroeder, 1951
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Quaranta, Didier, Long & Ebert, 2006
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera barbouri, Chimaera spilota, Hydrolagus cf. barbouri
Original description species: (Garman, 1908)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Didier, 2002
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera collei, Chimaera colliaei, Chimaera colliei, Chimaera media, Chimaera neglecta., Chimaera (Hydrolagus) collei, Hydrolagus cf. colliei, Hydrolagus collei, Hydrolagus media, Hydrolagus (Chimaera) colliei
Common name: Spotted ratfish
Original description species: (Lay & Bennett, 1839)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera deani, Hydrolagus cf. deani
Common name: Philippine chimaera
Original description species: (Smith & Radcliffe, 1912)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Common name: Robin’s Ghostshark
Original description species: Walovich, Ebert & Kemper, 2017
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Common name: Black ghostshark
Original description species: Didier, 2008
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Moura, Figueiredo, Bordalo-Machado, Almeida & Gordo, 2005
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Hydrolagus macrophathalmus
Original description species: De Buen, 1959
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Original description species: Didier, 2008
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Common name: Striped rabbitfish
Original description species: Soto & Vooren, 2004
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Common name: Galápagos Ghost Shark
Original description species: Barnett, Didier, Long & Ebert, 2006
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Hydrolagus cf. melanophasma
Common name: Eastern Pacific Black Ghostshark
Original description species: James & Ebert & Long & Didier, 2009
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera mirabilis, Chimaera (Bathyalopex) mirabilis, Hydrolagus cf. mirabilis
Common name: Large-eyed rabbitfish
Original description species: (Collett, 1904)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera mitsukurii, Chimaera mitsukurii Dean 1904, Hydrolagus cf. mitsukurii, Psychichthys mitsukurii
Common name: Spookfish
Original description species: (Jordan & Snyder, 1904)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera monstrosa australis, Chimaera novae zealandiae, Chimaera novaezealandiae, Hydrolagus novaezelandiae, Phasmichthys novaezealandiae, Phasmichthys novaezelandiae
Common name: Dark ghost shark
Original description species: (Fowler, 1911)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Common name: Pale ghost shark
Original description species: Hardy & Stehmann, 1990
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Chimaera eidolon, Chimaera gilberti, Chimaera purpurescens, Hydrolagus cf. purpurescens, Hydrolagus eidolon, Psychichthys eidolon
Common name: Purple chimaera
Original description species: (Gilbert, 1905)
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali

Synonyms: Hydrolagus cf. trolli
Common name: Pointy-nosed blue chimaera
Original description species: Didier & Séret, 2002
Genus: Hydrolagus Gill, 1863
Family: Chimaeridae Bonaparte, 1831
Order: Chimaeriformes
Subclass: Holocephali