Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Interactive image map to choose major taxa Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

National Moth Week was July 19-27, and the Summer 2025 gathering in Louisiana, July 19-27

Photos of insects and people from the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2024

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27


Species Isonychia obscura

Representative Images

Stream Mayfly - Isonychia obscura - female Mayfly - Isonychia obscura Mayfly - Isonychia obscura Brushlegged Mayfly - Isonychia obscura Brushlegged Mayfly - Isonychia obscura Brushlegged Mayfly - Isonychia obscura  Mayfly - Isonychia obscura - female Isonychia bicolor o arida ? - Isonychia obscura - female

Classification

Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Superfamily Heptagenioidea
Family Isonychiidae (Brushlegged Mayflies)
Genus Isonychia
Species obscura (Isonychia obscura)

Explanation of Names

Isonychia obscura Traver 1932

Range

e. NA(1) map(2)