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Pellia (Pellia epiphylla), Riverside, Warren County, NY, August 2023

in muck at base of rocks in the flood zone of the Hudson River in Warren County, NY.
(This was underwater yesterday and will be again tomorrow.)

Duplicate of https://www.inaturalist.org/observations/180706978 by @smpierce.

Small specimen of a little known brachiopod found mainly in S. CA but also described as far north as Tomales Bay. It has turned up in a few recent surveys in Elkhorn Slough. ID and info from John Pearse and Mark Silberstein.

Larva 4mm long. 1st two images are 20 x; 3rd image is 10x.

Leaf-folding larvae on Quaking Aspen/Populus tremuloides leaves. In most but not all cases, the fold is next to a roughly circular eaten area. In most, but not all, cases, a single leaf will have folds on two sides of the leaf.

Too small to roll over to count prolegs, though it looks like six in first image, hence sawfly larvae and not caterpillar. I'll check back to see how they grow...

Note: leaf and larva specimen collected with permission.

At a wet pond edge. Not sure, it doesn't look too similar to the online pictures of Bryoandersonia. But I don't know other options. What looked like terminal spines are present on the costae; axillary hairs present; margins sometimes revolute; leaves strongly concave; mid-leaf cells not very long.

20 × 7 mm thallus with apothecia ≤0.2 mm on bark of Prunus serrulata ‘Kanzan’ (E40-17)

immediately above the same species with different thallus texture and apothecia color: https://www.inaturalist.org/observations/75247120

apothecia ≤0.2 mm on bark of Prunus serrulata ‘Kanzan’ (E40-17)

immediately below the same species with different thallus texture and apothecia color: https://www.inaturalist.org/observations/75247119

host to lichenicolous fungus Athelia arachnoidea 📷 on brownstone mausoleum (Young 1857) with a gray crustose lichen 📷