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I would only call them "A. cf. eunotus (Orangetail) (probably)" if you knew for sure that they were collected in the area where this species is located. But since you have no reliable catch location at all (not even a country), I would just call them A. cf. eunotus.
It's actually very easy: if the said catch location is correct, it's a new form/species and an adequate name would be A. cf. eunotus (Rio Yurua). On the other hand, if it's from some other, unknown catch location, it's impossible to tell for sure whether it's a known or new species. In this case...
It's a regani-complex species. Since the male seems to show no caudal pattern, there are not many (known) possibilities. The first one that comes to my mind is A. sp. Gelbwangen/Yellow-cheeks. However, for this to be the case, the male shows too much red markings on the lower head and lacks the...
The male seems to show split bars all the time - for me it's some form of A. cf. eunotus. In the area where they are said to be collected, there are many rivers which are tributaries of the Rio Ucayali.
It's a brevis-group species, probably one of the piaroa-like ones. A picture of a male with a fully spread dorsal fin might be helpful together with information about the size of the specimen.
Knowing that your fish are from Peru and show distinct split bars, it in fact doesn't makes any sense at all to call them A. cf. moae instead of A. cf. eunotus.
One of your fish shows very distinct split vertical bars, something I have never seen on any A. moae. On all the pictures of the latter I know, merely in one picture I can see a very faint split bar. Therefore, unlike A. moae, your fish are for sure an eunotus-subcomplex species and if this is...
#2 is A. sp. Blutkehl. Depending on the shape of the caudal fin #3 can be A. iniridae (rounded caudal) or A. sp. Blutkehl (two tipped/lyrate caudal). #1 & #4 can also be A. sp. Blutkehl or some other uaupesi-like species. Have they all been collected together or at different locations, if so where?
My guess would be A. sp. Blutkehl but I'm not 100% sure from these pictures. Please show some more pictures of male and female when not displaying. The black markings on the abdomen are the crucial feature here.