Fulgoromorpha

Evans, 1946

planthoppers

Infraorder Guides

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is an infraorder of Hemiptera containing over 12,500 described worldwide, commonly known as planthoppers. These insects are characterized by plant-feeding habits using to extract phloem sap. The group exhibits remarkable morphological diversity, including elaborate ornamentation in some such as Fulgoridae. Planthoppers are distributed globally across terrestrial , with particularly high diversity in tropical regions. While most species are not economically significant, some have emerged as serious agricultural pests, notably the spotted lanternfly (Lycorma delicatula) in North America.

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Pronunciation

How to pronounce Fulgoromorpha: //fʌl.ɡɔːr.oʊˈmɔːr.fə//

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Identification

can be distinguished from other Auchenorrhyncha by the combination of: with the first segment (scape) enlarged and often bulbous, or arising from near the apex of the scape; hind tibia typically with a movable spur (calcaneus); and wing venation patterns with characteristic branching of . Within Hemiptera, they differ from Cicadomorpha (leafhoppers, treehoppers, cicadas) by antennal structure and hind leg . The infraorder contains distinguished by shape, wing structure, and male genitalia; expert identification often requires examination of these features under magnification.

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Appearance

Planthoppers typically exhibit cryptic coloration resembling leaves or plant stems, with body forms ranging from slender and elongate to compact and squat. varies dramatically across : some possess unmodified heads while others display elaborate projections, bulbs, or horn-like structures (particularly in Fulgoridae). are usually short and bristle-like. Wings, when present, are often held roof-like over the body; some are brachypterous or . The hind legs are frequently enlarged and adapted for jumping, though planthoppers generally move slowly to avoid detection. Body size ranges from minute (3 mm in some cave-dwelling species) to relatively large (over 5 cm in some lanternflies).

Habitat

Planthoppers occupy diverse terrestrial including forests, grasslands, wetlands, and agricultural systems. Many are associated with specific plants. Some lineages have adapted to specialized environments: cave-dwelling species (e.g., Iuiuia caeca in Brazil) occur in subterranean limestone systems; arid-adapted species inhabit dry grasslands and prairies; tropical species are particularly diverse in rainforest . The spotted lanternfly (Lycorma delicatula) has demonstrated remarkable habitat plasticity in its North American range, exploiting urban, agricultural, and forested landscapes.

Distribution

distribution with highest in tropical regions, particularly Southeast Asia, tropical Africa, and the Neotropics. Iran harbors over 200 recorded with nearly 50% , reflecting complex geography and high speciation potential. Bulgaria records 177 species from 82 . North American fauna includes native genera such as Scolops (Dictyopharidae) distributed across southern Canada, the United States, and northern Mexico. The spotted lanternfly, native to China, has established across the eastern United States from Pennsylvania to multiple neighboring states.

Seasonality

In temperate regions, most planthoppers exhibit or with activity peaking in summer months. The spotted lanternfly shows extended activity from late July through early October for adults, with masses deposited in fall. Some tropical may reproduce year-round. Cave-dwelling species likely show reduced seasonality due to stable subterranean conditions.

Diet

All members are obligate plant-feeders, utilizing to extract phloem sap from vascular plants. Feeding causes direct damage through sap removal and indirect damage via honeydew , which promotes growth. plant associations range from monophagous specialization (e.g., Ditropis pteridis on bracken) to extreme polyphagy (spotted lanternfly documented on over 100 plant including grapes, apples, stone fruits, and hardwoods).

Life Cycle

Hemimetabolous development with , nymph, and stages. Eggs are laid in various substrates: plant tissue, soil, or exposed surfaces including non-living materials (spotted lanternfly deposits waxy egg masses on tree trunks, vehicles, and furniture). Nymphs pass through 4-5 instars before adulthood. Developmental duration varies: Ochthera planthoppers complete egg-to-adult in approximately 16-21 days under laboratory conditions, while spotted lanternfly nymphal development extends over months with as eggs. Some exhibit parental care or gregarious nymphal .

Behavior

Planthoppers generally move slowly and cryptically to avoid detection, relying on plant mimicry. When disturbed, many can jump using enlarged hind legs. Some lineages produce waxy secretions from abdominal glands that repel or disguise the insect as cottony plant debris. of some species are attracted to lights. The spotted lanternfly exhibits distinctive mass on tree trunks and other surfaces prior to mating, potentially mediated by substrate-borne vibrations and chemical cues from honeydew.

Ecological Role

Planthoppers function as primary consumers in terrestrial , converting plant phloem into animal . Their honeydew production supports complex trophic interactions: ants, , bees, and other insects collect honeydew as food; growth on honeydew-covered surfaces alters plant physiological processes. Some participate in with ants. As herbivores, they influence plant composition and can mediate plant- transmission. High local abundance can make them herbivores in some (e.g., Ditropis pteridis comprising 81-94% of herbivores on bracken in Polish studies).

Human Relevance

Economic impacts are mixed: most are benign, but several are significant agricultural pests. The spotted lanternfly (Lycorma delicatula) threatens vineyards, orchards, and hardwood industries in North America, with potential billions in economic impact. Historically, other planthoppers have caused crop damage. Some species serve as bioindicators: Ancyronyx buhid (Elmidae, though not ) demonstrates the potential for aquatic insect relatives as water quality indicators. Planthoppers are also subjects of ecological research on invasion , , and mimicry. Their striking morphological diversity, particularly in tropical lanternflies, contributes to biodiversity tourism and scientific illustration.

Similar Taxa

More Details

Taxonomic History

The infraorder was established by Evans in 1946. Traditional classifications sometimes treated constituent differently; modern molecular and morphological studies have clarified relationships within Auchenorrhyncha, confirming Fulgoromorpha as monophyletic.

Vibrational Communication

Recent research demonstrates that planthoppers, including the spotted lanternfly, respond to substrate-borne vibrational signals. This has potential applications for through 'vibrational trapping' techniques.

Endemism and Conservation

High in regions like Iran (nearly 50% of recorded ) and localized distributions of cave-dwelling species highlight conservation concerns. destruction, agriculture, and climate change threaten restricted-range species.

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Sources and further reading