''Marmara oregonensis'' is a

moth Moths are a paraphyletic group of insects that includes all members of the order Lepidoptera that are not butterflies, with moths making up the vast majority of the order. There are thought to be approximately 160,000 species of moth, many of w ...

of the family

Gracillariidae Gracillariidae is an important family of insects in the order Lepidoptera and the principal family of leaf miners that includes several economic, horticultural or recently invasive pest species such as the horse-chestnut leaf miner, ''Cameraria ...

. It is known from

Oregon Oregon () is a U.S. state, state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington (state), Washington, while the Snake River delineates much of it ...

, United States. The

larva A larva (; plural larvae ) is a distinct juvenile form many animals undergo before metamorphosis into adults. Animals with indirect development such as insects, amphibians, or cnidarians typically have a larval phase of their life cycle. The ...

e feed on '' Abies grandis'' and '' Pseudotsuga menziesii''. They mine the stem of their host plant. It mines the smooth bark surfaces. The mines are formed in the living periderm of the host causing superficial injury to the tree.A New Species of Bark-Mining Marmara (Lepidoptera: Gracillariidae) from Douglas-fir
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References

Gracillariinae Moths described in 1975 {{Gracillariinae-stub