nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpq9j8j890the48lygdqf2y6kzyjte32ml0dgjyyxzkf3f0w030dlsqrdedye (nprofile…edye) I would call it a serifed I. Because those things are serifs.
Calling these serifs “crossbars” would imply that they either connect two stems (as in A or H,) or cut across a main stroke (as in t or f). They do neither.