Hello guest! Are you an Apistogramma enthusiast? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Apisto enthusiasts to meet online. Once you join you'll be able to post messages, upload pictures of your fish and tanks and have a great time with other Apisto enthusiasts. Sign up today!
Yes everyone can call them as they want, but in doing so, things become even worse. So it's a good idea to stick to the commonly used names in case of domestic strains too.
The males of most (probably all) Apisto species can show more or less pronounced black anterior edges in their ventral fins (not pectoral!). It's just that females do so more regularly and in a more pronounced way.
E.g. this is a proven male A. flavipedunculata:
I don't agree with Mike here. To me they look 100% like A. sp. "Alto Vaupes II" (D50), a mouthbrooding species from the D10-group. I'm sure that they are simply labeled wrongly by the LFS.
I agree that they are not A. ortegai. Since they don't show the typical extended or double caudal blotches, they might be one of the "with separate caudal spot" forms, if so likely A. cf. ortegai (Pebas, with separate caudal spot).
You have at least 3 different species:
1. the "velifera" are in fact A. sp. Putzer,
2. an iniridae-group species:
which is probably A. uaupesi
3. the "megaptera" which are most likely A. cf. piaroa (A165).
Unlike megaptera and velifera, these 3 species are not from the Orinoco but rather...
If the dark blotch turns into the usual metallic bluish/greenish coloration when the fish color up, it's A. cf. eunotus (Schwanzstreifen). If it stays dark/black, I would regard it as a new species/form.
It's likely some population of A. cf. eunotus (Schwanzstreifen). The black blotch on the gill-cover is a bit strange. Is it also present on the other side? Can you please post some more photos of the fish, preferably in different moods?