acuta, Sympterygia Garman [S.] 1877:206 [Proceedings of the Boston Society of Natural History v. 19; ref. 1528] Buenos Aires, Argentina. Holotype (unique): MCZ 632-S. Type catalog: Hartel & Dingerkus 1997:xlviii [ref. 23119]. •Valid as Sympterygia acuta Garman 1877 -- (McEachran 1982:887 [ref. 5381], McEachran & Dunn 1998:286 [ref. 23312], Compagno 1999:490 [ref. 25589], Cousseau et al. 2000:32 [ref. 40447], Menni & Stehmann 2000:88 [ref. 24909], López et al. 2002:62 [ref. 26808], Gomes & Gadig in Menezes et al. 2003:30 [ref. 27192], Bovcon et al. 2010:[5] 836 [ref. 41480], Mabragaña et al. 2011:table S2 [ref. 31800], Orlando et al. 2015:1 [ref. 33686], Weigmann 2016:102 [ref. 34211], Last et al. 2016:25 [ref. 34941], Last et al. 2016:469 [ref. 35005], Nión et al. 2016:23 [ref. 35565], Jurado et al. 2017:161 [ref. 35569], Carvalho-Filho 2023:317 [ref. 40480], Gadig et al. 2024:71 [ref. 40775]). Current status: Valid as Sympterygia acuta Garman 1877. Arhynchobatidae. Distribution: Southwestern Atlantic: Rio de Janeiro (Brazil) south to northern Argentina. Habitat: marine.