Ptychocheilus Agassiz [L.] 1855:227 Masc. Ptychocheilus gracilis Agassiz & Pickering 1855. Type by original designation. Type generally regarded as designated by Jordan & Gilbert 1877:90 [ref. 4907], but Agassiz (p. 229) says, "The predatory habits of the type of this genus...[gracilis]." Spelled Ptychochilus by Gill 1865:70 [ref. 12243]. •Valid as Ptychocheilus Agassiz 1855 -- (Mayden et al. 1991 [ref. 19123], Gilbert 1998:19 [ref. 23395], Simons & Mayden 1998:313 [ref. 25587], Minckley & Marsh 2009:161 [ref. 31114]). Current status: Valid as Ptychocheilus Agassiz 1855. Leuciscidae: Laviniinae.