Indeed; but the L system isn't really even a taxonomic classificatory system; it's based purely on outer appearance with an emphasis on pattern. Anyways, aff. = affin., which means that the animal is similar to its quoted species but not synonymous, as opposed to cf, or confer. Also, the teeth are used for biting, as it does when it bites off pieces of sponge and/or small inverts (think midges, shrimp, etc.) when feeding.