You may be right. There may be more reference images for females now than there were back in 2011. I'll have to try and find images that show differences between Paleacrita and Phigalia females.

I very much understand that situation! Some Phigalia have wing nubs about as small as Paleacrita or Alsophila, titea is a standout for its comparatively expansive reduced wings. I believe Alsophila have also been recorded in spring but I don't think so far north as MN.

Male Alsophila are frequent early-season geometrids in MN and ND, but I've never seen a female Alsophila in the Spring, even though I tried very hard to find them. Fall female Alsophila are not difficult to find, and, of course, male Alsophila are very common in the late autumn.

I was blissfully unaware of the spring presence of Alsophila. A self-fulfilling supposition I guess. Evidently you should never underestimate a creature that can fly at freezing temps. I wonder if the females have a harder time fueling basic respiratory metabolism through the winter with (possibly? probably?) a load of eggs. Hard to imagine they wouldn't die after mating and laying eggs. I wonder how parthenogenesis might figure in. While the females mate, they then 'discard' the male genes. I can't recall if they all do this, or only some populations or portions of given populations. (Actually, none of this makes much sense to me!)

This was the species that turned my attention to moths on 21 October 2009. An acquaintance submitted an image of a female Alsophila that I'd photographed to BugGuide. It was identified as a wingless female Alsophila pometaria. Until that time I was relatively unaware of moths and completely unaware of wingless female moths, Jim. And it has been moths, moths, moths ever since then. P.S. Your book was incredibly helpful to me in those first few years of mothing. It holds a prominent place in my library of field guides. Thank you for that, Jim.

https://bugguide.net/node/view/855986

Glad to hear that and thanks for saying so!
This is my third run at moths. First was in grade school, then as a teen, and then again in 1989, inspired by Janzen and Hallwachs's work in Costa Rica. This is the last time though!