1. Yes, "convict" is a common name originally referred to one species, Amatitlania nigrofasciata. Today, many more CAs are available in the hobby and dwarf CAs are commonly called convict cichlid by aquarists, collectors and scientists. Technically, all CAs originated from a single lineage and can cross breed. Amatitlania nigrofasciata has been known to cross breed with just about every CA available in the hobby, so it is not far fetched to call all dwarf CAs "convict" and that there is "convict" in every CA tributary. No one would call dwarf SAs "convict" as they originated from different and multiple lineages, and rarely can SAs cross breed with CAs. One exception is a SA from Uruquay , Australheros Red Ceibal, that has been known to cross breed with "convict" apparently and surprisingly sharing a common lineage thousands mile apart. I have kept and bred Red Ceibal long time ago and they look and behave like "convict"