1) Shield-shaped 
shaped like a shield
• (a.) Buckler-shaped; round or nearly round. • (a.) Protected or covered by bony or horny plates, or large scales.
Scu'tate adjective [ Latin scutatus armed with a shield, from scutum a shield.] 1. Buckler-shaped; round or nearly round. 2. (Zoology) Protected or covered by bony or horny plates, or large scales. 
Type: Term Pronunciation: skū′tāt Synonyms: scutiform
shaped like a shield