Prokelisia

Prokelisia species are small delphacid planthoppers distinguished by their association with Spartina host plants in salt marsh habitats. Within the genus, P. marginata and P. dolus are sympatric and morphologically similar; they can be separated by male genitalia and subtle differences in coloration and body proportions. The most conspicuous feature is wing dimorphism: brachypters have reduced, non-functional wings while macropters possess fully developed wings. This dimorphism is environmentally determined by crowding and host plant quality cues during nymphal development, not genetically fixed.

Salt marsh ecosystems dominated by Spartina cordgrasses. P. marginata specifically inhabits intertidal zones along Atlantic and Gulf coasts of North America, feeding on Spartina alterniflora. P. dolus occupies similar marsh habitats. The introduced population of P. marginata in Britain exploits the invasive cordgrass Spartina anglica in estuarine saltmarshes.

Native to North America: Atlantic coast from New England to Florida, and Gulf Coast. P. marginata has been introduced to Britain where it has established on the east and south coasts of England and south Wales. GBIF records indicate presence in Denmark and Norway, though these may represent limited or incidental occurrences.

Phloem sap feeder on Spartina cordgrasses. P. marginata feeds selectively on Spartina alterniflora; the introduced British population exploits Spartina anglica. Feeding occurs on above-ground plant parts, with adults particularly abundant on seed heads which contain higher protein content.

• Spartina alterniflora - primary host plantnative North American cordgrass
• Spartina anglica - host plantinvasive cordgrass exploited by introduced P. marginata in Britain
• Anagrus delicatus - egg parasitoidmymarid wasp
• Anagrus halcyon - egg parasitoidmymarid wasp
• Anagrus n. sp. - egg parasitoidundescribed species
• Gonatopus sp. - nymphal parasitoiddryinid wasp
• Neon sp. - nymphal parasitoiddryinid wasp
• Eurypteryx sp. - adult parasitoidstrepsipteran

Multivoltine with overlapping generations. Eggs are laid in plant tissue. Nymphal development includes five instars; wing form is determined during this stage by environmental cues (crowding, host plant nutrition). Adults emerge as either flightless brachypters or fully winged macropters. Brachypters mature earlier and reproduce sooner; macropters delay reproduction and disperse to colonize new habitats.

Males are highly polygynous, capable of copulating with up to six females in under one hour, though sperm depletion limits complete insemination to approximately four females. Females are typically monandrous; sexual receptivity begins 48 hours post-eclosion, with calling behavior signaling readiness to mate. Female calling is terminated by a substance in the male ejaculate that induces sexual refractoriness—a mechanism first documented in Hemiptera for this genus. Wing dimorphism represents a dispersal polymorphism: brachypters remain in stable patches while macropters colonize and escape deteriorating habitats. Macropters exhibit superior habitat tracking ability, moving more effectively from low- to high-quality patches than brachypters.

Herbivore in salt marsh food webs, converting Spartina primary production into insect biomass. Serves as critical host supporting diverse parasitoid communities across multiple trophic levels (egg, nymphal, and adult parasitoids). In its introduced British range, P. marginata experiences enemy release with no documented parasitism, potentially contributing to population outbreaks that damage host plants and threaten salt marsh stability. The wing dimorphism system provides a textbook example of adaptive phenotypic plasticity in response to environmental heterogeneity.

P. marginata has been introduced to Britain where it damages the invasive cordgrass Spartina anglica—ironically, a plant itself introduced for coastal stabilization. Heavy herbivory by planthopper outbreaks may compromise the long-term stability of vulnerable saltmarsh habitats, creating management challenges where the invasive plant has become established. The genus serves as a model organism for ecological research on dispersal evolution, host-parasitoid interactions, and phenotypic plasticity.

• Other DelphacidaeProkelisia is distinguished from other delphacid genera by its strict association with Spartina in salt marsh habitats, wing dimorphism system, and specific parasitoid community composition. Many delphacids are agricultural pests on cereals or other grasses, whereas Prokelisia is restricted to intertidal marsh systems.

• planthopper
• salt marsh
• wing dimorphism
• Spartina
• dispersal polymorphism
• parasitoid host
• model organism
• invasive species
• phenotypic plasticity
• brachypter
• macropter
• delphacid
• Hemiptera
• enemy release
• habitat tracking

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• Publications | Entomology Research Museum
• Parasitoids of the Plant Hopper, Prokelisia marginata (Homoptera: Delphacidae)
• Factors affecting female sexual receptivity in the planthopper, Prokelisia dolus
• Biology of Anagrus delicatus (Hymenoptera: Mymaridae), an Egg Parasitoid of Prokelisia marginata (Homoptera: Delphacidae)
• Crowding and Host Plant Nutrition: Environmental Determinants of Wing‐form in Prokelisia marginata
• The Adaptiveness of Wing‐Dimorphism in the Salt Marsh‐Inhabiting Planthopper, Prokelisia Marginata (Homoptera: Delphacidae),
• Migration in Heterogeneous Environments: Differences in Habitat Selection Between the Wing Forms of the Dimorphic Planthopper, Prokelisia Marginata (Homoptera: Delphacidae)
• Biology of and Rates of Parasitism by Nymphal and Adult Parasites of the Salt-Marsh-Inhabiting Planthoppers Prokelisia marginata and P. dolus
• Establishment, spread, and impact of an invasive planthopper on its invasive host plant: Prokelisia marginata (Homoptera: Delphacidae) exploiting Spartina anglica (Poales: Poaceae) in Britain