Epeorus (Little Maryatt; Sulphur; Western Quill Gordon; Yellow Quill. )	larva (nymph) Copyright © 2010 Joseph Fortier	imago (spinner) - male Copyright © 2001 Arlo Pelegrin
Epeorus	Abdomen w/o paired dorsal tubercles; 2 tails.	1st segment of fore tarsi equal to length of 2nd segment; heart-shaped femoral markings.
Epeorus albertae (Gray-winged Pink Quill; Pink Albert; Pink Lady; Slate Cream Dun; Western Gray-winged Yellow Quill; Salmon Spinner. )		subimago (dun) - female Copyright © 2011 Bob Newell imago (spinner) - male Copyright © 2012 Ken Schneider subimago (dun) - female Copyright © Bob Newell
Epeorus deceptivus (Light Blue Quill. )
	Abdomen light to dark chocolate brown; thorax medium olive brown; 1st gills extend forward under the thorax, but don't curve inward and overlap; blunt femoral flange; 2 tails.	Body gray or pale cream/olive; wings medium gray; length 9-11 mm.; 2 tails; emerges Jul - early Oct.
Epeorus dulciana
Epeorus grandis	larva (nymph) Copyright © 2006 Arlo Pelegrin
	Body dark brown, gills w/purplish hue; dense row of dorsal hairs down the middle of abdomen; first/last pairs of gills extend under thorax and abdomen respectively and overlap to form a suction disk; 2 tails.	.
Epeorus hesperus
Epeorus longimanus (Coquette; Medium Blue Quill; Quill Gordon; Slate Brown Dun; Western Quill Gordon ; Red Quill Spinner. )
	Body brown w/darker markings; femora w/dark markings and blunt flange; extended 1st and last gills meet under body to form suction disks; 2 tails.	Body pale gray w/darker tegites; wings gray to dark slate; length 10-14 mm.; 2 tails: emerges mid-late Jul.
Epeorus permagnus

State of Washington distribution is based on:
Mayflies (Ephemeroptera) of the far western United States (Part I: Washington) by M. D. Meyer & W. P. McCafferty,
and augmented by A DNA Barcode Library for North American Ephemeroptera: etc. by Webb, Jacobus, Funk, et. al.