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Genus Stenonema

mayfly? - Stenonema femoratum mayfly - Stenonema femoratum May Fly - Stenonema femoratum Maccaffertium subimago confirmed - Stenonema femoratum - male Ephemeroptera - Stenonema femoratum Maccaffertium - Stenonema femoratum - female  Stenonema femoratum? - Stenonema femoratum Stenonema femoratum_13Jul2021 - Stenonema femoratum - male
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Ephemeroptera (Mayflies)
Suborder Pisciforma
Superfamily Heptagenioidea
Family Heptageniidae (Flatheaded Mayflies)
Genus Stenonema
Synonyms and other taxonomic changes
some workers [e.g., (1)] include here members of Maccaffertium
Explanation of Names
Stenonema Traver 1933
Numbers
monotypic genus(2), but see above
Range
nearctic(2)