semifasciatum, Triakis Girard [C. F.] 1855:196 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 7 (no. 6); ref. 18001] Near Presidio, San Francisco, California, U.S.A. Syntypes: USNM 988 (1, not found in 1980). Type catalog: Howe & Springer 1993:13 [ref. 21812]. See Mustelus felis Ayres 1854. Mustelus felis is a senior synonym of Triakis semifasciata Girard 1855, but felis is an unused senior synonym subject to Reversal of Precedence (Art. 23.9.1). Triakis is feminine, so the spelling semifasciata is used. •Valid as Triakis semifasciatum Girard 1855 -- (Dimick 1944:253 [ref. 39451]). •Valid as Triakis semifasciata Girard 1855 -- (Eschmeyer & Herald 1983:35 [ref. 9277], Compagno 1984:433 [ref. 6846], Compagno et al. in Fischer et al. 1995:743 [ref. 22829], De La Cruz Agüero et al. 1997:33 [ref. 24545], Compagno 1999:482 [ref. 25589], Espinosa Pérez et al. 2004:44 [ref. 27705] dated to 1854, Nelson et al. 2004:53 [ref. 27807], Love et al. 2005:7 [ref. 37547], Castro 2011:384 [ref. 31457], Pietsch et al. 2012:98 [ref. 31825], Page et al. 2013:51 [ref. 32708], Pietsch & Orr 2015:15 [ref. 34694], Del Moral-Flores et al. 2016:88 [ref. 34398], Weigmann 2016:51 [ref. 34211], Kells et al. 2016:68 [ref. 35888], Ebert et al. 2017:55 [ref. 35618], Ehemann et al. 2018:23 [ref. 36194], Burton & Lea 2019:29 [ref. 37205], González-Acosta et al. 2021:6 [ref. 38361], Love et al. 2021:17 [ref. 39279], Page et al. 2023:39 [ref. 40505]). Nomen Protectum. Current status: Valid as Triakis semifasciata Girard 1855. Triakidae: Triakinae. Distribution: Eastern Pacific: Washington (U.S.A.) south to Pacific coast of Baja California Sur (Mexico), including Guadalupe Island (Mexico) and Gulf of California (Mexico). Habitat: marine.