Romalea microptera

Definition

A large, flightless grasshopper species in family Romaleidae, native to the southeastern and south-central United States. Adults reach 5–7 cm in length, display aposematic coloration (typically black with yellow, orange, or red markings), and are chemically defended; they sequester toxins from host plants and possess defensive glands that emit a noxious foam when disturbed. The species is notable for its slow, clumsy locomotion—reflected in the common name "lubber" (from Middle English *lobre*, meaning clumsy or lazy)—and its habit of aggregating in open habitats such as fields, roadsides, and pine flatwoods. Romalea microptera is frequently used in entomology education and research as a model for chemical ecology, aposematism, and grasshopper development.

Etymology

Genus Romalea from Greek *romos* (strong) + *alea* (wanderer); specific epithet microptera from Greek *mikros* (small) + *pteron* (wing), referring to the reduced, non-functional wings.

Example

In defensive displays, Romalea microptera rears up, hisses audibly by forcing air through abdominal spiracles, and may regurgitate gut contents or eject a foamy secretion from thoracic defensive glands containing compounds such as quinones and phenolics derived from its diet of toxic plants including Asclepias and Solanum.

Synonyms

• Eastern lubber grasshopper
• Florida lubber grasshopper
• Georgia thumper

Related Terms

• Romaleidae
• aposematic coloration
• defensive secretion
• brachyptery
• chemical sequestration
• Orthoptera
• Taeniopoda

Usage Notes

Taxonomic circumscription varies: traditional treatments recognize Romalea as monotypic (containing only R. microptera), while recent phylogenetic work has synonymized Taeniopoda under Romalea, expanding the genus to roughly a dozen species distributed from the southern United States through Central America. When referring to the specific North American species, "Romalea microptera" remains the stable name regardless of broader generic reclassification. The common name "lubber" is shared with other large, slow romaleid grasshoppers; geographic modifiers (eastern, Florida) help distinguish this species from western relatives such as Taeniopoda eques (horse lubber grasshopper).