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Species Euthycera flavescens

Unknown bug - Euthycera flavescens Marsh Fly - Euthycera flavescens  fly red eyes - Euthycera flavescens Fly - Euthycera flavescens Marsh Fly - Euthycera arcuata? - Euthycera flavescens Marsh fly? - Euthycera flavescens Marsh Fly - Euthycera flavescens Euthycera arcuata  for Louisiana? - Euthycera flavescens
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Diptera (Flies)
No Taxon ("Acalyptratae")
Superfamily Sciomyzoidea
Family Sciomyzidae (Marsh Flies, Snail-killing Flies)
Tribe Tetanocerini
Genus Euthycera
Species flavescens (Euthycera flavescens)
Synonyms and other taxonomic changes
Euthycera flavescens (Loew 1847); synonyms, etc.:
Tetanocera cribraria Harris, 1835 [nomen nudem]
Tetanocera flavescens Loew, 1847
Tetanocera arcuata Loew, 1859
Euthycera borealis Cresson, 1920
Euthycera uniformis Cresson, 1920

The accepted name is now E. flavescens per Murphy & Mathis 2018, although the genus needs revision as there may be a complex of several species. As E. flavescens is the oldest name, it is being used for the time being. (1)
Identification
"Very distinctive species with a unique closed-wing shape." --Bill Murphy
Range
the US & so. Canada east of Rocky Mountains(2)(3)
Works Cited
1.Comprehensive taxonomic, faunistic, biological, and geographic inventory and analysis of the Sciomyzidae of the Delmarva region
W.L. Murphy and W.N. Mathis. 2018. Zootaxa 4430(1):1.
2.Manual of Nearctic Diptera Volume 2
Varies for each chapter; edited by J.F. McAlpine, B.V. Petersen, G.E. Shewell, H.J. Teskey, J.R. Vockeroth, D.M. Wood. 1987. Research Branch Agriculture Canada.
3.Thompson F.C., Pape T., Evenhuis N.L. (2013) Systema Dipterorum, Version 1.5