Although there probably are lots of hybrid and line bred Texans (red?), it seems the name Texas cichlid has erroneously become a catchall term for almost every cichlid in the Herichthys genus, because there are a number that look very similar.
Here is Herichthys carpintus "location chairel
Herichthys tamasopoensi
Herichthys minckleyi
Only cyanoguttatus is a Texas cichlid, non of the rest come from Texas.