I was wondering if there was an (updated) list of the A-numbers with their current name? I have the DATZ book but that's from 2005 and since then new apistos have been found and others have been given an official scientific name.
I update my apisto species list as I learn of new descriptions of previously undescribed species and newly discovered species. It's a never-ending process. So yes, I keep a list of new species names and their old A-number. My list has about 230 apistos that I consider separate species and about half as many 'forms' that might be separate species. It's now almost 20 pages of 10 pt. type. That's a lot of text to put out on the web so I don't expect it to be published ... and I expect many new species soon, now that Colombia is safer for hobbyists to collect.
As for books, nothing comprehensive (or close to it) has been published in past 10 years. Römer's Cichlid Atlas 2 adds to CA1 but isn't comprehensive. The latest web-based information on apistos is probably on Martin & TomC's web site (http://apisto.sites.no/) and here.