richardsoni, Cyprinodon Boulenger [G. A.] 1907:412 [Zoology of Egypt: The fishes of the Nile; ref. 6510] Brine spring near Usdum, Dead Sea, 31°51'N, 35°25'E. Lectotype: BMNH 1856.5.2.4. Paralectotypes: BMNH 1856.5.2.5 (8). Based on three literature sources. Lectotype selected by Krupp & Schneider 1989:389 [ref. 13651]. •Synonym of Lebias dispar Rüppell, but a valid subspecies -- (Lazara 2001:183 [ref. 25711]). •Synonym of Aphanius dispar (Rüppell 1829), but a valid subspecies richardsoni (Boulenger 1907) -- (Goren 1974:100 [ref. 7502], Krupp 1983:619 [ref. 8320], Tortonese in Whitehead et al. 1986:624 [ref. 13676], Krupp & Schneider 1989:389 [ref. 13651], Wildekamp 1993:46 [ref. 26378], Coad 1995:26 [ref. 23608], Seegers 1997:16 [ref. 23895], Hamidan 2004:390 [ref. 37679], Khalaf 2013:4 [ref. 37897]). •Valid as Aphanius richardsoni (Boulenger 1907) -- (Geiger et al. 2014:Table S2 [ref. 37408], Freyhof et al. 2017:566 [ref. 35649], Esmaeili et al. 2018:7 [ref. 36738], Teimori et al. 2018:[12] [ref. 35934], Kärst et al. 2020:105 [ref. 38165]). •Valid as Aphaniops richardsoni (Boulenger 1907) -- (Freyhof & Yoğurtçuoğlu 2020:432 [ref. 37656], Zarei et al. 2022:[6] 856 [ref. 40528], Çiçek et al. 2023:470 [ref. 40601], Çiçek et al. 2024:351 [ref. 40789]). Current status: Valid as Aphaniops richardsoni (Boulenger 1907). Aphaniidae. Distribution: Middle East: springs in the Dead Sea basin (Israel and western Jordan). Habitat: freshwater, brackish.