During his life, Maitland Emmet became one of Britain's leading specialists in the Microlepidoptera, as well as a Classical scholar.
Mann described many species of Lepidoptera new to science focussing on Microlepidoptera.
He was an expert on Microlepidoptera and some consider him one of the founders of modern Microlepidoptera systematics.
An autodidact like many naturalists of the time, he specialized in the study of Microlepidoptera.
Röslerstamm developed a method system of systematic tables (1834–1842) for the Microlepidoptera and described many new species of these tiny moths.
A micro-moth, Pammene trauniana, can be found - also dippers, kingfishers, buzzards, otters, bats and damselflies.
The species is named after Donald R. Davis, curator of lepidoptera at the National Museum of Natural History, Smithsonian Institution, United States, an authority on the microlepidoptera of the world.