paradoxus, Plecodus Boulenger [G. A.] 1898:497 [Proceedings of the Zoological Society of London 1898 (pt 3); ref. 20658] Lake Tanganyika. Holotype: MRAC 189. Appeared first as above, then in more detail in Boulenger 1898:22, Fig. 2 [ref. 547]; also in Boulenger 1900:153, Pl. 52 (fig. 4) [ref. 555]. •Valid as Plecodus paradoxus Boulenger 1898 -- (Maréchal & Poll 1991:384 [ref. 20946], De Vos et al. 2001:130 [ref. 26059], Kullander & Roberts 2012:362 [ref. 31751]). •Valid as Perissodus paradoxus (Boulenger 1898) -- (Konings 2015:323 [ref. 34660], Konings 2019:343 [ref. 36983]). Current status: Valid as Perissodus paradoxus (Boulenger 1898). Cichlidae: Pseudocrenilabrinae. Distribution: Eastern Africa: Lake Tanganyika and Lukuga River drainage. Habitat: freshwater.