-
top jaw barbel not joined to head by membranelower jaw & belly: 7 + barbels
-
top jaw barbel joined to head by membrane, has accessory barbelflank - no ridges except LL2 pairs lower barbels, under head only
-
top jaw barbel joined to head by membrane, no accessory barbelflank - 3-4 ridges2 pairs lower barbels, under head only