On groups saturated with dihedral groups and linear groups of degree $2$

The paper establishes the structure of periodic groups and Shunkov groups saturated with groups consisting of the groups $\mathfrak{M}$ consisting of the groups $ L_2 (q) $, where $ q\equiv 3,5\pmod{8} $ and dihedral groups with Sylow $2$-subgroup of order $2$. It is proved that a periodic group saturated with groups from $ \mathfrak{M}$ is either isomorphic to a prime Group $ L_2 (Q) $ for some locally-finite field $ Q $, or is isomorphic to a locally dihedral group with Sylow $2$-subgroup of order $2$. Also, the existence of the periodic part of the Shunkov group saturated with groups from the set $ \mathfrak{M} $ is proved, and the structure of this periodic part is established.