Adhesion
Guides
Hemisphaerota cyanea
palmetto tortoise beetle, Florida tortoise beetle, iridescent blue chrysomelid beetle
Hemisphaerota cyanea is a small, metallic blue tortoise beetle in the leaf beetle family Chrysomelidae. Adults measure 4.6–5.6 mm and possess distinctive hemispherical bodies with dark blue or purple elytra and pronotum. The species is endemic to the southeastern United States where it feeds exclusively on palms, particularly saw palmetto. Both adults and larvae exhibit remarkable defensive adaptations: adults use specialized adhesive tarsi with approximately 10,000 bristles per foot to clamp onto leaves, while larvae construct elaborate fecal thatches that conceal and protect them from predators.