Cricotopus sylvestris

Fabricius, 1794

Cricotopus sylvestris is a non-biting midge in the Chironomidae with a broad distribution spanning Asia, Europe, and North America. In the United Kingdom, it is considered native with a sporadic range. Laboratory studies indicate that larval development is strongly temperature-dependent, with completion in 10 days at 22–29°C versus 28 days at 15°C. The exhibits one of the highest production-to- (P/B) ratios reported for chironomids, suggesting rapid turnover and high ecological productivity.

Cricotopus sp. sylvestris group female Bytom by Adrian Tync. Used under a CC BY-SA 4.0 license.

Pronunciation

How to pronounce Cricotopus sylvestris: /ˌkrɪkoʊˈtoʊpəs sɪlˈvɛstrɪs/

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Habitat

Shallow estuarine environments and freshwater systems. In the Hudson River estuary, larvae were found living on submerged aquatic vegetation, specifically Myriophyllum spicatum, where they comprised 80% of abundance.

Distribution

Asia, Europe, United Kingdom (native but sporadic), and North America. Specific distribution records include the Azores (Graciosa, São Jorge, São Miguel, Santa Maria, Terceira).

Seasonality

Development timing varies with temperature. In laboratory conditions, larvae complete development in 10 days at 22–29°C and 28 days at 15°C. Field development was estimated at 42 days. contributes significantly to flux, with emerged adults representing 34% of produced larval biomass annually.

Life Cycle

Holometabolous. Larval development is temperature-dependent, with faster development at higher temperatures. production includes substantial , with emerged adult estimated at 2 g·m⁻²·yr⁻¹.

Ecological Role

member of in certain shallow estuarine , accounting for 31% of total chironomid production and 60% of production associated with Myriophyllum spicatum in studied systems. Serves as prey for naiads, other , and fish. In North America, has been noted as a natural enemy of Berosus ingeminatus and Ischnura verticalis. High P/B ratio of 21.0 indicates rapid turnover characteristic of productive, disturbed, or seasonal environments.