It's basically a guessing game when it comes to which variant. To me it resembles the Rio Negro population.
Here is a thread of several different alitfrons variants from Andy (ajot) that you can assure are labelled correctly
http://www.eartheaters.com/phpBB2/viewtopic.php?t=332
Here is a site with lots of pictures, the second post down on the main page shows a lot of pictures of altifrons, cf. altifrons and aff. altifrons from different rivers. Though in my opinion the images aren't good enough to base a good ID.
http://larry.meinvhex.org/
The problem with the location is, if you don't know then you don't know and guessing isn't a good solution. They are very nice looking fish regardless. Hope that helps,
Ed
Here is a thread of several different alitfrons variants from Andy (ajot) that you can assure are labelled correctly
http://www.eartheaters.com/phpBB2/viewtopic.php?t=332
Here is a site with lots of pictures, the second post down on the main page shows a lot of pictures of altifrons, cf. altifrons and aff. altifrons from different rivers. Though in my opinion the images aren't good enough to base a good ID.
http://larry.meinvhex.org/
The problem with the location is, if you don't know then you don't know and guessing isn't a good solution. They are very nice looking fish regardless. Hope that helps,
Ed