Scrobipalpa obsoletella

The combination of small size (12–14 mm wingspan), pale greyish-ochreous forewings with dark fuscous stigmata, and the distinctive dark spot beyond the second discal stigma helps distinguish this species from similar Scrobipalpa. The terminal palp segment as long as the second segment is a useful diagnostic character. The indistinct pale angulated fascia at three-quarters, when present, provides additional confirmation. Similar species in the genus Scrobipalpa require genitalia examination for definitive separation; the synonyms S. xylochroa and S. obsoletella hospes have been synonymized based on morphological continuity.

Coastal salt marshes and sandy beaches. The species is tightly associated with saline or alkaline coastal environments where host plants of the genera Atriplex and Chenopodium occur.

Native to most of Europe, Turkey, the Caucasus, Iran, and eastward through Asian Russia (Transbaikal) to Mongolia. Introduced populations established in New Zealand, South Africa (including Namibia), and North America. The Namibian record represents a relatively recent documentation in the Afrotropical region.

Adults on wing from May to August. Larvae occur from June to July, with a second generation present in September. This bivoltine larval pattern suggests partial second generation development in favorable conditions.

Larvae feed on Atriplex glabriuscula, Atriplex halimus, Atriplex litoralis, Atriplex tatarica, and Chenopodium species. These host plants are all members of Chenopodiaceae (now often treated as Amaranthaceae), typically found in saline or disturbed coastal habitats.

• Atriplex glabriuscula - larval host
• Atriplex halimus - larval host
• Atriplex litoralis - larval host
• Atriplex tatarica - larval host
• Chenopodium - larval hostgenus-level association

Bivoltine or partially bivoltine. Larvae present in two periods: June to July and September. Pupation details not explicitly documented in available sources, but presumably occurs in soil or within host plant debris given the coastal habitat.

Larval herbivore on chenopod host plants in coastal ecosystems. Contributes to nutrient cycling in salt marsh and beach dune vegetation communities. No documented pollinator role or significant predator-prey interactions established in available literature.

No documented economic importance. Occasionally recorded in North America, New Zealand, and South Africa as an introduced species, likely transported through human maritime activity or plant material movement. Not known to be a pest of cultivated crops.

• Scrobipalpa xylochroaSynonymized with S. obsoletella; previously considered distinct based on minor wing pattern variations now recognized as intraspecific variation.
• Scrobipalpa obsoletella hospesFormerly treated as subspecies or distinct population; synonymized based on morphological continuity with nominate form.
• Other Scrobipalpa speciesMany congeners share similar size, wing pattern elements, and host plant associations; reliable separation often requires examination of male genitalia.

• coastal
• salt marsh
• chenopod feeder
• introduced species
• bivoltine

• BugGuide
• Wikipedia
• GBIF taxonomy match
• iNaturalist taxon
• NCBI Taxonomy
• Catalogue of Life
• A review of the genus Scrobipalpa Janse, 1951 (Lepidoptera, Gelechiidae) in the Afrotropical region