Fascia Adherens is a ribbon like structure that stabilizes non-epithelial tissue. Is similar to the Zonula Adherens or Adherens junction

Adherens junction

Adherens junctions are protein complexes that occur at cell–cell junctions in epithelial tissues, usually more basal than tight junctions...

 of epithelial cells but it's not belt-like. It's a broad intercellular junction in the longitudinal sections of an intercalated disk of cardiac muscle anchoring actin

Actin

Actin is a globular, roughly 42-kDa moonlighting protein found in all eukaryotic cells where it may be present at concentrations of over 100 μM. It is also one of the most highly-conserved proteins, differing by no more than 20% in species as diverse as algae and humans...

filaments. It helps to transmit contractile forces.