Trama

Trama aphids are distinguished from other Lachninae by their association with roots rather than above-ground plant parts. They differ from related root-feeding aphids such as Pemphigus and Geoica by specific morphological traits including antennal segment number and chaetotaxy (bristle arrangement). Identification to species level requires examination of microscopic features including the structure of the siphunculi, cauda shape, and antennal tubercles.

Members of Trama exhibit morphological modifications associated with subterranean existence. The body is often pale or whitish due to lack of pigmentation from living in soil. Antennae and legs may be reduced compared to above-ground aphids. Wax secretion is typically present. Eyes are often reduced or vestigial. Cornicles (siphunculi), when present, are usually small or reduced.

Strictly subterranean; found in soil associated with plant roots. Associated with various host plants including those in Asteraceae. Soil type and moisture conditions influence distribution but specific requirements vary by species.

Documented from Denmark (DK), Norway (NO), and Sweden (SE) based on GBIF records. The genus has a broader Palearctic distribution with additional records from Europe and parts of Asia.

Phloem-feeding on roots of host plants. Specific host associations vary by species within the genus.

• Asteraceae - host plant familyRoot-feeding association

Subterranean existence throughout life cycle. Colonies form on roots and may be tended by ants. Winged dispersal forms are produced under specific conditions for colonization of new host plants.

Root-feeding herbivore that may influence plant resource allocation and growth. Ant-tended species participate in mutualistic relationships with Formicidae. Serves as food source for soil-dwelling predators and parasitoids.

Potential agricultural pest on root crops and ornamental plants. Limited documented economic impact compared to above-ground aphid pests.

• GeoicaAlso root-feeding aphids in Lachninae; distinguished by antennal structure and number of rhinaria on antennal segment III
• PemphigusRelated root-feeding genus; differs in gall-forming capabilities on some hosts and specific morphological details of the head and siphunculi
• TetraneuraRelated genus in tribe Pemphigini; life cycle includes alternation between primary and secondary hosts, unlike Trama

• aphid
• root aphid
• subterranean
• Hemiptera
• Lachninae

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life