Prognathodes falcifer (Hubbs & Rechnitzer, 1958) .

Scythe Butterflyfish or Scythe-marked Butterflyfish. To 17 cm (6.8 in) TL (Robertson and Allen 2002). Santa Cruz Island, southern California (Richards and Engle 2001), along the outer Baja California Coast (Benjamin Frable), eastern Gulf of California (Benjamin Frable, pers. comm. to M.L.), Islas Revillagigeos (Benjamin Frable), and Isla Galápagos (McCosker and Rosenblatt, 2010). Depth: 3–270 m (10–886 ft) (min.: Pérez-España et al. 1996; max.: McCosker et al. 1997).