Montana Field Guide

Help

Montana Field Guides

Home - Other Field Guides
- Kingdom - Animals - Animalia
  - Phylum - Spiders, Insects, and Crustaceans - Arthropoda
    - Class - Insects - Insecta
      - Order - Stoneflies - Plecoptera
        
        Family - Green Stoneflies - Chloroperlidae
        
        Species - Striped Sallfly - Triznaka signata

Striped Sallfly - Triznaka signata

No photos are currently available

If you have a high quality photo of this species, are confident in the identification, and would like to submit it for inclusion on the Montana Field Guide, please send it to us using our online photo submission tool.

Image Copyright and Usage Information

Native Species

Global Rank: G5
State Rank: SNR

Agency Status
USFWS:
USFS:
BLM:

External Links

General Description

This small, yellow-green stonefly is represented by the "Yellow Sally" dry fly for fly fisherman. It lives on the cobbles of streams and rivers for one year before emerging in the late spring or summer.

Diagnostic Characteristics

Triznaka adults can be distinguished from other
Nearctic Chloroperlinae by the combination of the distinctive dark marking of the head and pronotum, presence of a ventral hammer on sternum 7 in males, a blunt, thick epiproct tip and the absence of rods and downy appendages on the aedeagus (Gaufin et al., 1972).

Range Comments

Global Range: (less than 2,500,000 square km (greater than 1,000,000 square miles)). It occurs in the Coast, Cascade, and Rocky Mountains from New Mexico northward to Alaska and Yukon (Stewart and Oswood, 2006). In Montana, this species is reported to be widespread across the western portion of the state from about Big Timber westward.

Observations in Montana Natural Heritage Program Database

Number of Observations: 4

(Click on the following maps and charts to see full sized version) Map Help and Descriptions

Relative Density

Recency

(Observations spanning multiple months or years are excluded from time charts)

Habitat

This species occurs in creeks and rivers (Gaufin et al., 1972). We have reports from small streams to streams as large as the upper Yellowstone River.

Food Habits

Merritt and Cummins (1996) report that members of this family are trophically shredder-detritivores; eating large particulate organic materials such as detritus, leaves and plants.

Ecology

Adults emerge from May to August (Gaufin et al., 1972).

Reproductive Characteristics

Adults emerge from May to August (Gaufin et al., 1972).

References

Literature Cited AboveLegend: View Online Publication
- Cummins, K.W. and R.W. Merritt. 1996. Ecology and distribution of aquatic insects. Chapter 6, pages 74-86 in R.W. Merritt and K.W. Cummins (eds.) An Introduction to the Aquatic Insects of North America. Third Edition. Kendall/Hunt Publishing Company, Dubuque, Iowa. 862 pp.
- Gaufin, A.R., W.E. Ricker, M. Miner, P. Milam, and R.A. Hays. 1972. 'The Stoneflies (Plecoptera) of Montana'. Transactions of the American Entomological Society. 98 (1): 1-161.
Additional ReferencesLegend: View Online Publication
Do you know of a citation we're missing?
- Gustafson, D. L. 1990. Ecology of aquatic insects in the Gallatin River drainage. Ph.D. Dissertation. Bozeman, MT: Montana State University. 194 p.
- Novak, M.A. 1988. Impacts of a fire-flood event on physical and biological characteristics of a small mountain stream. M.Sc. Thesis. Bozeman, MT: Montana State University. 98 p.
- Stadnyk, L. 1971. Factors affecting the distribution of Stoneflies in the Yellowstone River, Montana. M.Sc. Thesis. Bozeman, Montana: Montana State University. 36 p.
Web Search Engines for Articles on "Striped Sallfly"
Additional Sources of Information Related to "Insects"

Take us with you!

Look for this PDF icon as you search and browse. Click it to build a custom PDF with species shown on that page or for all the species within that taxonomic level. To create your own list of species, use the PDF Creator tool at the bottom of the Advanced Search page.

Here's some links if you want to download a whole group.

Dragonflies / Damselflies

Ferns and allies

Conifers

Flowering Plants (Dicots)

Flowering Plants (Monocots)

Citation for data on this website:
Striped Sallfly — Triznaka signata. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April 24, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=IIPLE1A020