Isoperla lata

Frison, 1942

Dark Stripetail

Isoperla lata, commonly known as the dark stripetail, is a green-winged in the Perlodidae. It is native to North America with documented in Labrador, Maine, Massachusetts, Michigan, and Minnesota. The inhabits cold-water trout streams where it functions as a on other aquatic insects. Research from Wisconsin indicates a slow with synchronous spring and temperature-dependent development.

Pronunciation

How to pronounce Isoperla lata: /ˌaɪsoʊˈpɜrlə ˈleɪtə/

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Habitat

Small second-order trout streams with cold, flowing water. Documented from Ripley Creek, a trout stream in Lincoln County, Wisconsin.

Distribution

North America: Labrador, Maine, Massachusetts, Michigan, Minnesota. Central Wisconsin (Lincoln County) specifically documented.

Seasonality

Synchronous occurs in late April through early May when stream temperatures reach 9-14°C. present through approximately mid-May based on laboratory longevity data.

Diet

Primarily . Nymphs feed on larval Chironomidae (), Ephemeroptera (mayflies), and Plecoptera (other stoneflies).

Life Cycle

Slow (S1) . require 40-46 days in-stream incubation and hatch synchronously over two days when water temperature reaches 20°C. Nymphal growth nearly exponential from June to January, with greatest increment June-October; growth declines until . Average maximum size attained in February. Males develop through approximately 18 instars, females approximately 19 instars.

Behavior

Synchronous mass in spring. Synchronous hatching of over a two-day period triggered by temperature threshold. Under laboratory conditions, females require male presence to deposit eggs; field-collected females did not carry eggs, suggesting mating occurs before oviposition.

Ecological Role

in trout stream , consuming larval , mayflies, and other stoneflies. Serves as prey for trout and other aquatic predators.