Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.
Source: Eggs Of Western Nearctic Acroneuriinae (Plecoptera: Perlidae)
Egg. Outline oval with short stalked collar, ends broadly rounded (Fig. 1). Length including collar ca. 430 - 460 µm, equatorial width ca. 360 - 390 µm, collar length ca. 35 - 40 µm, collar width at mid-length ca. 60 - 68 µm. Egg body at base of collar encircled by slightly raised ridge. Sides of collar with irregular, prominent struts (Fig. 2); rim flanged and irregularly incised (Figs. 1 - 2). Anchor biscuit-shaped, surface with scattered mushroom bodies (Fig. 3). Chorionic surface relatively smooth but with obscure hexagonal follicle cell impressions visible at 500 X (Figs. 2, 4). Micropylar row subequatorial.