"Mainstream metaphysics" means categorialism. Everybody knows about genus/species hierarchy.
"What is the relationship between categorialism and hylemorphism, Aristotle’s other major ontological theory? Where does matter fit, if at all, in the categorial scheme?"
"What is the relationship between categorialism and hylemorphism, Aristotle’s other major ontological theory? Where does matter fit, if at all, in the categorial scheme?"
https://plato.stanford.edu/entries/aristotle-categories/