@vogelcommando What makes you think its not a golden? Hemigrammus has a number of species similar in appearance to rodwayi so its totally possible, golden tetras are the most common in the aquarium trade however so it was my first guess.
And that is where the problem is DelacoursLangur, the shop where I took this picture hardly has any common species and is specialized in species not offered normaly in the trade.
Here a list of Hemigrammus they had in stock recently :
Hemigrammus coeruleus
Hemigrammus erythrozonus
Hemigrammus pulcher
Hemigrammus ulreyi
Hemigrammus rhodostomus
Hemigrammus sp. Yurimaguas