Not really. Plecostomus is a specific species, cat is used to cover an entire family(Felidae) of which Felis catus, the housecat, and panthera Leo, lions are part of. It's a bit more like calling cats, dogs, possums, foxes, racooons and any other fluffy 4 legged animals Canis Lupus. Canis Lupus being the grey wolf.