On gloss:

fiprlepisoste in sense "fish (genus Lepisosteus)"
f1 is a gar (genus Lepisosteus) of species f2.
fiprtraktoste in sense "fish (genus Atractosteus)"
f1 is a gar/garpike (genus Atractosteus) of species f2.

On affix form:

garna
x1 is a rail/railing/bar [tool] supporting/restraining x2, of material x3.