robustus, Ptychostomus Cope [E. D.] 1870:473 [Proceedings of the American Philosophical Society v. 11 (no. 84); ref. 913] Yadkin River, North Carolina, U.S.A. Holotype (unique): lost. Type catalog: Böhlke 1984:36 [ref. 13621], Gilbert 1998:198 [ref. 23395]. Lectotype selected by Robins and Raney 1956:32 [ref. 12222] as ANSP 6958, with paralectotype ANSP 6959, but that designation is invalid as the single type is lost and represents a different species than ANSP 6958 (R. Jenkins, pers. comm.). •Valid as Scartomyzon robustus (Cope 1870) -- (Jenkins & Burkhead 1994:491 [ref. 21581]). •Valid as Moxostoma robustum (Cope 1870) -- (Lee et al. 1980:432 [ref. 22416], Page & Burr 1991:187 [ref. 18983], Gilbert 1998:198 [ref. 23395], Wirgin et al. 2001:526 [ref. 25238], Nelson et al. 2004:80 [ref. 27807], Scharpf 2006:12 [ref. 30386], Page & Burr 2011:328 [ref. 31215], Page et al. 2013:80 [ref. 32708], Darden & Tarpey 2014:70 [ref. 33348], Page et al. 2023:65 [ref. 40505]). Current status: Valid as Moxostoma robustum (Cope 1870). Catostomidae: Catostominae. Distribution: North America: North Carolina, South Carolina and Georgia (eastern U.S.A.). Habitat: freshwater.