Epiplatys: from the Greek ἐπί (epí), meaning ‘above, on top of’,  and πλατύς (platýs), meaning ‘flat, broad’, in reference to the flat dorsal surface of the anterior half of the body in members of this genus.

grahami: Named for J.M. Graham

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 Epiplatys grahami is currently available in the hobby. 

A number of locations have been collected around Lagos, southwestern Nigeria.  

References:

Wildekamp, R.H., 1996. A world of killies. Atlas of the oviparous cyprinodontiform fishes of the world. Volume III: The genera Empetrichthys, Epiplatys, Episemion, Floridichthys, Fluviphylax, Foerschichthys, Fundulopanchax,. Fundulosoma and Fundulus. American Killifish Association, Inc. 330 p.

American Killifish Association:  https://aka.org/!area_Affiliates/wak/Ref_Library/Epiplatys/E.grahami.htm