pygmaeus, Gobius Holly [M.] 1929:487, Figs. 1-2 [Sitzungsberichte der Österreichischen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Klasse v. 138 (pt 1); ref. 16090] Near Zoodochos [Piggi] near Kaligoni, a small village on Levkas [Lafkas] Island, Ionian Islands, Greece. Syntypes: NMW 33930 (12). Type catalog: Bogutskaya et al. 2022:62 [ref. 39277]. •Questionably a synonym of Knipowitschia panizzae (Verga 1841) -- (Miller 1973:497 [ref. 6888]). •Valid as Economidichthys pygmaeus (Holly 1929) -- (Economidis & Miller 1990:134 [ref. 16710], Economidis 1995:208 [ref. 23025], Bianco et al. 1996:53 [ref. 26724], Kottelat 1997:176 [ref. 22952], McKay & Miller 1997:1464 [ref. 24951], Economou et al. in Miller 2004:443 [ref. 27853], Huyse et al. 2004:327 [ref. 27956], Kottelat & Freyhof 2007:564 [ref. 29996], Barbieri et al. 2015:106 [ref. 35029], Thacker et al. 2018:[8] [ref. 36082], Parenti 2021:135 [ref. 38603], Shumka et al. 2023:37 [ref. 40747] as Economidichthy spygmaeus, Zogaris et al. 2024:217 [ref. 40912]). Current status: Valid as Economidichthys pygmaeus (Holly 1929). Oxudercidae: Gobionellinae. Distribution: Southeast Europe: Levjas Island (Greece); Albania. Invasive in Thrace region (northeastern Greece) Habitat: freshwater.