nachtriebi, Leuciscus Cox [U. O.] 1896:615 [Report of the Commissioner, United States Commissioner of Fish and Fisheries Pt 20 (for 1894) (Appendix 9); ref. 12385] Mille Lacs Lake, Aitkin County, Minnesota, U.S.A. Holotype: USNM 47688. Paratypes: (about 40) CAS-SU 4999 (1), 5000 (1), plus additional specimens not found. Type catalog: Böhlke 1953:33 [ref. 12291], Gilbert 1998:117 [ref. 23395]. •Synonym of Semotilus margarita (Cope 1867) -- (Lee et al. 1980:364 [ref. 22416], Smith 1986:158 [ref. 22186]). •Synonym of Semotilus margarita (Cope 1867), but a valid subspecies -- (Scott & Crossman 1998:516 [ref. 24570], Scharpf 2005:24 [ref. 28940]). •Synonym of Margariscus margarita (Cope 1867), but a valid subspecies -- (Baxter & Stone 1995:85 [ref. 23374], Stauffer et al. 1995:107 [ref. 23376], Gilbert 1998:117 [ref. 23395], McPhail 2007:00 [ref. 31199]). •Valid as Margariscus nachtriebi (Cox 1896) -- (Bailey et al. 2004:82 [ref. 27882], Page & Burr 2011:188 [ref. 31215], Page et al. 2013:73 [ref. 32708], Page et al. 2023:72 [ref. 40505]). Current status: Valid as Margariscus nachtriebi (Cox 1896). Leuciscidae: Plagopterinae. Distribution: Eastern North America: northeastern U.S.A. Habitat: freshwater.