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ANHIMIDAE - Screamers (2:3)
ANHIMA Brisson, 1760 F - Anhima Brisson; type by tautonymy = Palamedea cornuta Linnaeus, 1766  
Anhima cornuta   (Linnaeus, 1766) Horned Screamer
vColombia, Venezuela, the Guianas to S Bolivia, SE Brazil (Paraná) and NE Argentina (N Misiones)
CHAUNA Illiger, 1811 F - Parra chavaria Linnaeus, 1766; type by monotypy  
Chauna chavaria 1  (Linnaeus, 1766) Northern Screamer
iN Colombia (south to middle Magdalena valley in S BolĂ­var) and NW Venezuela (S Maracaibo basin)
Chauna torquata   (Oken, 1816) Southern Screamer
vE Bolivia and SC Brazil (Mato Grosso) to C Argentina (La Pampa and Buenos Aires)

1 Considered to form a superspecies with C. torquata by Sibley & Monroe (1990) [Sibley, 1990 #3636].