Ditomyiidae
Guides
Symmerus
Symmerus is a Holarctic genus of fungus gnats in the family Ditomyiidae (Diptera). The genus comprises approximately 16 described species distributed across the northern hemisphere, with records from Europe, North America, and Asia. A systematic revision recognized two subgenera: Symmerus s. str. and Psilosymmerus, the latter established with S. coqulus as type species. The genus has been subject to phylogenetic analysis using Hennig's phylogenetic systematics, with transantarctic relationships documented in the related genus Australosymmerus.
Symmerus lautus
Symmerus lautus is a Holarctic species of fungus gnat in the family Ditomyiidae (subfamily Ditomyiinae). The species was originally described as Plesiastina lauta by Loew in 1869 and has been known under the synonyms S. tristis and S. dilutus. The genus Symmerus belongs to a group of non-brachyceran Diptera commonly referred to as fungus gnats, though specific biological details for S. lautus remain poorly documented.
Symmerus vockerothi
Symmerus vockerothi is a species of fungus gnat in the family Ditomyiidae, described by Munroe in 1974 from eastern North America. It is classified within the subgenus Psilosymmerus, one of two subgenera established for the Holarctic genus Symmerus. The species was described in a comprehensive systematic revision that also included limited biological observations.