This link discusses A. sp. Schawrzkinn/Black-chin from Peru, not A. juruensis from Brazil. I am willing to bet that your this is the same species that you have. The true A. juruensis is not very common in the hobby.
how about this:
http://apistogrammaidiots.com/David_P__Soares/Articles/articles.html
or this, for that matter:
http://www.forum.apistogramma.com/search.php?searchid=77735
Are care and breeding the same for both species? If I know I can properly care for them, heck I'll take them and get some pics.
well, I thought I'll make it easier on you... but you'll have to click on the "search" button, above and a bit right... then: "advanced search" then type "juruensis" in the "Key word(s)" field... and wait a second or two...The second link just gives me : Sorry - no matches. Please try some different terms.