Genus Ricania

Ricania is a genus of planthoppers within the family Ricaniidae and subfamily Ricaniinae. Species of this genus are primarily distributed in tropical and subtropical regions of Asia, with some species extending into other parts of the Old World. They are commonly associated with shrubs, trees, and cultivated plants, where they feed on plant sap.

Members of the genus Ricania are typically small to medium-sized planthoppers characterized by their broad, often triangular forewings, which are held roof-like over the body when at rest. The forewings usually display contrasting patterns of spots, bands, or reticulate markings, often in shades of brown, black, white, or translucent areas, providing effective camouflage against foliage and bark. The body is compact, with a short head, prominent compound eyes, and short, bristle-like antennae inserted below the eyes.

Like other fulgoroid planthoppers, Ricania species possess piercing–sucking mouthparts adapted for feeding on phloem sap. Development is hemimetabolous, with egg, nymph, and adult stages. Nymphs commonly produce waxy secretions from abdominal glands, forming filamentous coverings that protect them from predators and environmental stress.

Ecologically, species of Ricania function as herbivores and are part of complex plant–insect interactions within their habitats. Some species are of economic importance, as heavy infestations can weaken host plants and, in certain cases, they may act as vectors of plant pathogens. The genus Ricania is notable for its distinctive wing morphology and patterns, which make it a recognizable and representative group within the family Ricaniidae.