Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
Taxon on Apr 11, 2021April 11th, 2021, 10:52 am EDT
Hi Sean-
Pseudocloeon futile has been reclassified as Apobaetis futilis, but it would not be present in MD in any event. My best guess is that it might have been Acentrella turbida.