Tipula simplex

Doane, 1901

range crane fly

Tipula simplex, commonly known as the range crane fly, is a crane fly in the Tipulidae found in California and potentially Oregon. It is notable for pronounced in wing development: males possess fully developed wings, while females are essentially wingless with reduced wings subequal to the . The species inhabits unirrigated pastures and has been documented to reach larval densities capable of causing significant pasture damage.

Pronunciation

How to pronounce Tipula simplex: /ˈtɪ.pu.la ˈsɪm.pleks/

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Identification

Males are distinguished by fully developed wings with characteristic dark brown spot pattern along costal and margins. Females are identified by their greatly reduced, non-functional wings that are subequal in length to the —a rare condition among crane flies. The combination of in wing development and specific wing spot pattern separates this from other Tipula in the region.

Appearance

Males have fully developed wings with wing length of 11–12 mm. Wing pattern consists of dark brown spots along the costal and margins, separated by approximately 2 mm. Females are essentially wingless, with wings greatly reduced and subequal in length to the .

Habitat

Unirrigated pastures, particularly in the Central Valley of California. Potential suitable are specifically associated with pasture rather than other grassland or agricultural types.

Distribution

Known distribution in California from Santa Cruz County north to Colusa County and east to Mariposa County. Unconfirmed reports exist east of the Cascade Mountains in Oregon.

Diet

Larvae feed on old cow manure, plant roots, and decaying organic matter. feeding habits are unknown.

Life Cycle

Larval stage is the primary feeding and growth phase. emerge to reproduce. Specific details of laying, , or developmental timing are not documented.

Ecological Role

Larvae contribute to decomposition of organic matter including cow manure and decaying plant material. In high densities, larvae can cause adverse effects on pasture vegetation, including destruction of forage, bare ground creation, and negative impacts on watershed function. These have been observed approximately once every six years in Tulare County.

Human Relevance

Considered a pest in California pastures when larval reach high densities, capable of destroying forage and damaging watersheds. Documented as arguably the most well-known and well-researched crane fly in Tipulidae, indicating significance in entomological research.

More Details

Research significance

Described as arguably the most well-known and well-researched crane fly in the Tipulidae, indicating substantial scientific attention relative to other crane fly .

Population dynamics

causing severe pasture damage have been observed approximately once every six years in Tulare County, California.