Sciophila

Meigen, 1818

fungus gnat

Species Guides

Sciophila plurisetosa

Sciophila is a of fungus gnats in the Mycetophilidae, established by Meigen in 1818. These small flies are characterized by their association with fungal and shadowy environments. The genus includes both widespread Palaearctic and Neotropical species that have been intercepted as glasshouse contaminants. Species such as Sciophila holopaineni from Finnish Lapland and S. fractinervis from the Neotropics demonstrate the genus's broad geographic range and ecological diversity.

Sciophila plurisetosa by no rights reserved, uploaded by Ken Kneidel. Used under a CC0 license.

Pronunciation

How to pronounce Sciophila: //ˌsaɪ.oʊˈfaɪ.lə//

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Habitat

in this occupy diverse ranging from natural and Arctic environments to artificial glasshouse settings. Sciophila holopaineni inhabits shadowy river gulches in old-growth forests of eastern Lapland, while S. fractinervis has been intercepted in nurseries and glasshouses on potted plants.

Distribution

The has a broad distribution spanning the Palaearctic and Neotropical regions. Sciophila holopaineni is known from two locations in Finland and Russian Karelia. Sciophila fractinervis is native to the Neotropics (described from southern Brazil) and has been intercepted in Britain and the Netherlands. Other such as S. muglolutea and S. turkolutea occur in southeastern Turkey.

Diet

Larvae of at least some feed on fungal material. Sciophila fractinervis larvae feed on saprophytic fungal spores trapped in webs they construct on potting medium and plant bases. Fungi identified from larval webbing include Plectosphaerella species, Alternaria, Penicillium, and Mucor.

Life Cycle

In Sciophila fractinervis, larvae construct mucous webbing networks on potting medium surfaces and around plant bases, with pupae suspended in fine filamentous webbing in lower stems or leaf axils. Development from larva to takes approximately 10 days under incubation conditions.

Behavior

Larvae of S. fractinervis exhibit rapid retreat response to vibrations or -like movements. They produce scaffolding-like webs from labial gland secretions that serve multiple functions: aiding in dry locations, acting as a barrier against , and trapping fungal spores for feeding.

Ecological Role

Saprophagous and mycetophagous; larvae consume saprophytic fungal spores in both natural forest environments and glasshouse settings. No plant damage has been observed in glasshouse interceptions.

Human Relevance

Some have significance as indicators of quality and as glasshouse contaminants. Sciophila holopaineni was named after musician Tuomas Holopainen, raising public awareness of biodiversity. Sciophila fractinervis has been intercepted multiple times in British nurseries on imported ornamental and herb plants, though it causes no apparent damage.