Cymatosyrinx is a genus of sea snails, marine gastropod mollusks in the family Drilliidae. The following species have also been found as fossils in the United States and/or in Mexico in the age range: 37.2 to 0.012 Ma: Cymatosyrinx aclinica Tucker and Wilson 1933 (alternative combination: Cymatosyrinx lunata aclinica), Cymatosyrinx dorseyi Cooke 1926, Cymatosyrinx limatula Conrad 1830 (synonyms: Drillia limatula, Pleurotoma limatula), Cymatosyrinx lunata Lea 1833, Cymatosyrinx magnoliana Olsson 1916, Cymatosyrinx mariana Petuch 1988, Cymatosyrinx perpolita Dall 1890, Cymatosyrinx tiara Gardner 1948, Cymatosyrinx ziczac Gardner 1948.