Craspedolepta

Craspedolepta species are distinguished from other Aphalaridae genera by features of the genitalia and wing venation. C. nebulosa and C. subpunctata can be separated by their altitudinal distribution patterns, with C. nebulosa extending to higher elevations than C. subpunctata where they co-occur on shared host plants.

Associated with fireweed (Chamaenerion angustifolium, formerly Epilobium angustifolium) in field margins and natural vegetation. In Scotland, found in carrot and parsnip growing areas. Occupies altitudinal gradients, with species-specific upper range limits determined by thermal constraints.

Europe, Japan, and North America. European records include Denmark, Norway, and Sweden. In the British Isles, C. nervosa and five other species occur. In Scotland specifically, documented at Milnathort (Perth and Kinross), Tayport (Fife), Howe of Fife, and SASA Farm (Midlothian).

Phloem-feeding on host plants. Documented feeding on Chamaenerion angustifolium (fireweed/Rosebay Willow Herb).

• Chamaenerion angustifolium - host plantPrimary host; also known as fireweed or Rosebay Willow Herb
• 'Candidatus Liberibacter solanacearum' - harbored pathogenTwo novel haplotypes (Cras1 and Cras2) identified in C. nebulosa and C. subpunctata; first report of this bacterium in Aphalaridae

Transplant experiments demonstrate that neither C. nebulosa nor C. subpunctata can establish viable populations above their current upper altitudinal limits, even when host plants are present. C. nebulosa shows reduced body size with increasing elevation.

Potential reservoir for 'Candidatus Liberibacter solanacearum' novel haplotypes. May pose risk to carrot and potato industries through potential spread of new Lso haplotypes into crops, though vector capability has not been experimentally confirmed.

Emerging concern for agriculture due to association with 'Candidatus Liberibacter solanacearum', a pathogen affecting Solanaceous and Apiaceous crops. First detection of this bacterium in the Aphalaridae family raises questions about potential transmission routes to cultivated crops.

• Trioza anthrisciBoth are psyllids in the superfamily Psylloidea found in the UK that harbor 'Candidatus Liberibacter solanacearum'; however, Trioza anthrisci belongs to family Triozidae and carries Lso haplotype C rather than the novel Cras1 and Cras2 haplotypes found in Craspedolepta
• Trioza urticaeCo-occurs in Scottish agricultural habitats and harbors Lso haplotype U; distinguished by host association with Urtica dioica rather than Chamaenerion angustifolium

• psyllid
• Aphalaridae
• Liberibacter
• vector
• fireweed
• Scotland
• altitudinal distribution

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• What limits the altitudinal distribution of Craspedolepta species (Sternorrhyncha: Psylloidea) on fireweed?
• ‘Candidatus Liberibacter solanacearum’ distribution and diversity in Scotland and the characterisation of novel haplotypes from Craspedolepta spp. (Psylloidea: Aphalaridae)