taxonomy (science of finding, describing, classifying and naming organisms)

superphylum

biology

to study / to learn

in addition; furthermore / on top of (which)

the above / the top (position or direction) / the surface of / superior in skill, age, level, etc.

deep, profound

classification, categorization

to categorize, to classify

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend