Tire track eel actually have many complex and the most common in the hobby are the M. armatus and M. favus which looks very much alike but can be tell apart from it belly coloration.
There are more spiny eel that are under the name of "tire track eel" complex
-Mastacembelus armatus
-Mastacembelus favus
-Mastacembelus undulatus
-Mastacembelus notophthalmus
-Mastacembelus tinwini
-Mastacembelus pantherinus
-Mastacembelus sp cf. armatus (many more of this)
Tire track eels are still being study more as there are more species from this complex that pops out as a different species.
There are more spiny eel that are under the name of "tire track eel" complex
-Mastacembelus armatus
-Mastacembelus favus
-Mastacembelus undulatus
-Mastacembelus notophthalmus
-Mastacembelus tinwini
-Mastacembelus pantherinus
-Mastacembelus sp cf. armatus (many more of this)
Tire track eels are still being study more as there are more species from this complex that pops out as a different species.