The Howard and Moore Complete Checklist of the Birds of the World, 3rd edition
Princeton University Press
Princeton, New Jersey, USA
Remsen et al. (2005) comment on the status of Megaceryle Kaup 1848 in their developing South American Check-List as follows: "Megaceryle torquata and M. alcyon have been placed in the genus Ceryle in many classifications (e.g., Meyer de Schauensee 1970, AOU 1983, 1998), but most classifications have followed Fry (1980) in restricting Ceryle to Old World C. rudis (e.g., Sibley & Monroe 1990, Fry & Fry 1992, Woodall 2001). Data to support either treatment are minimal." They there list "Megaceryle torquata Ringed Kingfisher" and "Megaceryle alcyon Belted Kingfisher" as current valid names
Dickinson (ed., 2003) notes that the gender of Ceryle has been established to be masculine (though Megaceryl remains feminine), so Ceryle torquata would be corrected for gender to C. torquatus
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