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That is Nimbapanchax is in a sense an intermediate between and the "Roloffias". The similarity was so great "Roloffia maeseni" turned out to have an Epiplatys in the specimen jar, so Epiplatys maeseni is a real fish but the "Roloffia" that was using it's name has been renamed as Nimbapanchax leucopterygius.
Nimbapanchax melanopterygius, occurring in mountains nimbus in northeastern Guinea. This is a new species.
Also viridis, jeanpoli and petersi have also been moved to Nimbapanchax
Here's the key to Nimbapanchax from Sonnenberg's description of the Genus:
Key to Archiaphyosemion and Nimbapanchax species based on external morphological and live color pattern characters. 1. Males with alternating dark and light stripes on caudal fin; 11–12 transverse scales; 15–17 circumpeduncular scales; 30–34 lateral line scales; frontal squamation E-type ....................................................... Archiaphyosemion guineense - Males with dark blotches or dots on caudal fin; 8–10 transverse scales; 12–14 circumpeduncular scales; 27–30 lateral line scales; frontal squamation usually G-type ...................................................................................................... 2 2. Males sometimes with yellowish marginal or submarginal zone on anal and lower caudal fin, no white margin; females with brown, broad, wide-spaced bars on side; 8–9 transverse scales; 12 circumpeduncular scales ................. .................................................................................................................................................... Nimbapanchax petersi - Males with white or light blue margin around caudal fin, sometimes not closed; females without or with smaller spaced brown bars on side; 9–10 transverse scales; 13–14 circumpeduncular scales .................................................. 3 3. Males brown on side, center of many scales with metalic blue-green, little red pigmentation on side; dark brown or reddish blotch laterally above insertion of pectoral fin in females ............................................................................... 4 - Males metalic blue-green on side with only small brownish scale margins; no or only small brown or reddish blotch laterally above insertion of pectoral fin in females....................................................................................................... 5 4. Males with white or light blue margin and dark brown or red submarginal stripe on anal fin; unpaired fins in males with small brown dots on blue-greenish center; juvenile males and females laterally with bars ................................... ....................................................................................................................................... Nimbapanchax leucopterygius - Males with black or dark brown margin and often white submarginal stripe on anal fin; anal and caudal fin with brown or reddish-brown irregular blotches on blue-green center; no bars on side of males and only sometimes in frightened females....................................................................................................... Nimbapanchax melanopterygius 5 Males with lateral irregular distributed red dots on scales sometimes forming regular lines .....Nimbapanchax viridis - Males with lateral broad dark brown or red-brown bars or blotches at or slightly above body midline............ Nimbapanchax jeanpoli