naccarii, Acipenser Bonaparte [C. L.] 1836:fasc. 16-17, punt.87, Pl. 129 (fig. 2) [Iconografia della fauna italica; ref. 4892] Rivers Brenta, Adige, Piave, Livenza, Bacchiglione, Tagliamento; Florence, Italy. Syntypes: ANSP 624 (1), 625 (1) Bonaparte no. 72. Type catalog: Böhlke 1984:17 [ref. 13621]. Name declared a nomen protectum by Kottelat & Freyhof 2009:76 [ref. 30320] to establish precedence over Acipenser heckelii Bonaparte 1836. •Valid as Acipenser naccarii Bonaparte 1836 -- (Svetovidov 1973:83 [ref. 7169], Svetovidov in Whitehead et al. 1984:222 [ref. 13675], Lelek 1987:25 [ref. 22962], Artyukhin 1995:7 [ref. 23782], Mrakovcic et al. 1995:183 [ref. 23079], Bemis et al. 1997:37 [ref. 22871], Kottelat 1997:30 [ref. 22952], Bogutskaya & Naseka 2004:24 [ref. 28183], Kottelat & Freyhof 2007:52 [ref. 29996], Kottelat & Freyhof 2009:76 [ref. 30320], Lipej & Dulčić 2010:16 [ref. 36649], Hilton et al. 2011:136 [ref. 31407], Ćaleta et al. 2015:45 [ref. 34877], Barbieri et al. 2015:35 [ref. 35029], Nión et al. 2016:24 [ref. 35565] as nacarii and date 1838, Ćaleta et al. 2019:143 [ref. 37026], Carneiro et al. 2019:55 [ref. 37250], Lorenzoni et al. 2019:251 [ref. 37108], Dyldin et al. 2020:97 [ref. 37569], Kovačić et al. 2020:9 [ref. 37519], Kovačić et al. 2021:18 [ref. 39014], Shumka et al. 2023:36 [ref. 40747]). Current status: Valid as Acipenser naccarii Bonaparte 1836. Acipenseridae. Distribution: Mediterranean Sea: Adriatic Sea and its tributaries, Italy, Slovenia, Greece (extinct), Croatia, Montenegro and Albania; adjacent northeastern Atlantic: Portugal (extinct); introduced in Russia. Habitat: freshwater, brackish, marine.