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Your fish are not A. sp. Tefe which are distinguished from other agassizii-subcomplex species by the zigzag stripes males show along their body. For reference see here.
It's an eunotus- or cruzi-subcomplex species. Please tell us the catch location and show some photos of the male showing lateral band and caudal spot clearly. A photo of the complete female may also help.
Your fish could be some resticulosa-complex species but since they were sold as agassizii, they are most likely A. sp. Steel-blue. For some inexplicable reason these are often wrongly sold as agassizii or borellii.
Koslowski was one of the most knowledgable authors on Apistos and if you can get your hands on his newer book "Die Buntbarsche Amerikas 2 - Apistogramma & Co", buy it! His older book I would see more as a collectable for enthusisats today.
This isn't an ortegai-form and given the photos from the store, it's A. cf. cacatuoides:
In a small tank like yours, I would keep one pair of Apistos not more let alone different species. The A. (cf.) ortegai forms are natural species.
I agree with Mac, this female can be a form of A. (cf.) ortegai, given the name "purple" likely A. cf. ortegai (Morado):
Looking at the pictures of the fish shop's tank, the other species you got is a form of A. cf. cacatuoides.
Splits in the posterior bars occasionally occur in specimens of the cruzi- and ortegai-subcomplex too. It's just that in these subcomplexes they are exceptions whereas in the eunotus-subcomplex they are the rule.
Your fish isn't A. eremnopyge but rather an agassizii-group species, imo A. gephyra. Btw names like "A. sp. eremnopyge" are self-contradictory because A. eremnopyge is a scientifically desribed species whereas "sp." means that it is not.