Ceratophyllus styx
{{Short description|Species of flea}}
{{Speciesbox
| image = NHMUK010177259 A sandmartin flea - Ceratophyllus Ceratophyllus styx styx Rothschild, 1900.jpg
| image_caption = Female sandmartin flea
| genus = Ceratophyllus
| species = styx
| authority = Rothschild, 1900
}}
Ceratophyllus styx{{EOL|705641|Ceratophyllus styx}} is a species of flea in the family Ceratophyllidae. It was described by Rothschild in 1900.