Montana Field Guide

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- Kingdom - Animals - Animalia
  - Phylum - Spiders, Insects, and Crustaceans - Arthropoda
    - Class - Insects - Insecta
      - Order - Mayflies - Ephemeroptera
        
        Family - Ephemerellid Mayflies - Ephemerellidae
        
        Species - A Mayfly - Caudatella jacobi

A Mayfly - Caudatella jacobi

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Native Species

Global Rank: G3G4
State Rank: SNR

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General Description

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Range Comments

Known from British Columbia, Oregon, and Montana. The global ranking of this species may well increase as new collections from western states, including Montana, Oregon and Washington, are studied. Recently reported from a site in Juneau County, Alaska (Randolph and McCafferty, 2005).

Observations in Montana Natural Heritage Program Database

Number of Observations: 1

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Relative Density

Recency

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

Habitat

Habitat appears similar to the better known Caudatella hystrix, including riffle habitats in small to medium sized streams and often in association with algal growths and cobbles (McCafferty 2003).

Food Habits

Caudatella larvae are scrapers and collectors-gatherers feeding on detritus, algae and diatoms) (Cummins and Merritt 1996).

Threats or Limiting Factors

All forms of stream quality degradation pose potential threats to cold-water mayflies. These include siltation; pollution from agricultural and industrial waste; and hydrological alteration from diversions, dams, or withdrawal of excess water for human use.

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.
- McCafferty, P. Department of Entomology, Purdue University, West Lafayette, Indiana 47907.
- Randolph, R.P. and W.P. McCafferty. 2005. The mayflies (Ephemeroptera) of Alaska, including a new species of Heptageniidae. Proceedings of the Entomological Society of Washington 107(1): 190-199.
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Citation for data on this website:
A Mayfly — Caudatella jacobi. Montana Field Guide. Montana Natural Heritage Program. Retrieved on July 26, 2024, from https://FieldGuide.mt.gov/speciesDetail.aspx?elcode=IIEPH83050