Here is a more helpful picture from your site:
http://www.aqvaterra.com/imagenes/others_species/tetras36.jpg
If the wolf in question has the same jaw structure as the fish on the left then it's malabaricus or in the malabaricus family.
CORRECT
If it is the same as the wolf on the right, then it is lacerdae, aimara or in the lacerdae family.
CORRECT
If you are saying that australis is in the lacerdae family, then it MUST have the same jaw structure as lacerdae (one of the defining traits).
SIMILAR....NO IDENTICAL
Malabaricus may have multiple species under it's classification, but since not much work has been done to separate them into different species, they are all classified as malabaricus.
YES, THAT'S WHY WE CALL IT FOR "MALABARICUS GROUP"
This fish in question has the same jaw structure as the fish on the left, therefore it is malabaricus.
NOT IN MY OPINION...AND THAT BECAUSE THE JAW STRUCTURE OF THE H.australis, EVEN IF IT BELONGS TO THE "LACERDAE GROUP" AND EVEN IF THE JAW STRUCTURE IS MUCH MORE SIMILAR TO THE H.lacerdae...LOOKS LIKE SOMETHING BETWEEN THE JAW OF BOTH...
WE COULD SAY; H.malabaricus to the left....H.lacerdae to the right...and H.australis between those two...even if it's more to the right.
I realize that there are multiple visual differences between malabaricus and lacardae, but the jaw structure just seems to be the easiest and fastest way to separate the species.
OF COURSE!!
BUT NOT WHEN WE ARE TALKING ABOUT THE H.australis...FOR PEOPLE WHO DONT KNOW THE H.australis, I GUESS THEY HAVE MORE DIFFICULT TO SEE THE DIFFERENCE BETWEEN malabaricus-australis THAN THE DIFFERENCE BETWEEN malabaricus-lacerdae..iF THEY JUST LOOK AT THE JAW STRUCTURE AND NOT TO THE BODY SHAPE, PATTERNS AND COLOR