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Tetragma gei
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Prodoxidae
Genus: Tetragma
Davis & Pellmyr, 1992
Species: T. gei
Binomial name
Tetragma gei
Davis & Pellmyr, 1992

Tetragma gei is a moth of the Prodoxidae family. It is found in herb-rich steppe and forest openings in Washington, Idaho, Wyoming and South Dakota.

The wingspan is 11–17 mm. Adults are almost entirely pale ochreous or creamy white. Females possess an elongated, telescoping abdomen used to reach in the deeply recessed ovaries of the host plant.[1]

The larvae feed on Geum triflorum. Young larvae feed inside the developing seeds.