After Willi Ruhkopf, a German aquarist.

Berkenkamp H.O & Etzel V. 1980.

Epiplatys ruhkopfi spec. nov., eine neue Hechtlingsart aus Liberia (Pisces; Cyprinodontidae).

DKG Journal 12 (11): p 165-176, 9 figures, 2 maps.

71.5 mm (Acording to the original description).

D = 11-13, A = 16-18, D/A = +8-10, ll = 29-30 (+1-4) (Berkenkamp & Etzel 1980)

Epiplatys

fasciolatus

• Epiplatys fasciolatus ruhkopfi Radda & Pürzl 1987
• Aplocheilus ruhkopfi Scheel 1990

• Gbondo (Liberia)
• Kaningali (central Liberia)
• Zienzu

Given as '55 m north of Kaningali town, between Zienzu & Suakoko, central Liberia).

Presently only known from the area of the type locality. This area is drained by the upper Saint Johns River.

http://homepage.uibk.ac.at/homepage/c102/c102mr/epiplaty/ruhkopfi.htm

A species not often seen. Breeding reports are hard to find. As the fish is closely related to E.coccinatus I would presume breeding is similar.
I talked with a breeder in the UK who said they stopped breeding around October & resumed in the spring.