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Growing gragariously on grass stems and other herbaceous plant matter as well as a Juglans nigra petiole in a floodplain. Locally abundant. Cups oriented upwards. Dendrohyphidia present on the outsides of the cups. Basidia 4-spored. Spores hyaline and ellipsoid. Measurements from Piximetre:

4.52 × 2.40 µm

4.33 × 2.35 µm

4.13 × 2.75 µm

4.45 × 2.94 µm

4.13 × 3.03 µm

4.32 × 2.95 µm

(4.1) 4.13 – 4.45 (4.5) × 2.4 – 3 µm

Q = (1.4) 1.5 – 1.8 (1.9) ; N = 6

Me = 4.3 × 2.7 µm ; Qe = 1.6

Chlamydopus meyenianus = Tulostoma meyenianum

according to MycoMap:

"This sequence is the first record of the species from the state
This sequence is the first record of the genotype in GenBank
Multiple genotypes are going under this name in GenBank"

I am an avid mushroom forager, so one of my coworkers brought this specimen into work to ask me what it was that his dog had been digging up in his backyard in South Lake Tahoe.

I brought it home and found that it wasn't in any of my ID books so I posted online on a Facebook group to see if anyone knew what it was.

The following day, while I was at work, I saw that several people thought it was Lactarius rubriviridus, a rare species. I called my girlfriend to tell her, and she told me that our dog had taken it off of the counter and chewed it into pieces.

So, it was both discovered and destroyed by dogs.

My coworker told me that his dog digs them up all the time, but since then he has brought about 10 specimens to me, none of which have been rubriviridus.

I have what is left of the specimen dried in a ziplock bag, but it's a very small amount.

Note: The location on inaturalist is the correct general neighborhood but not precise. The property owner doesn't want the location online. He is continuing to bring me samples, maybe his dog will find another one.

All macroscopic and microscopic features are a good match.
Red-orange medium sized Spring fruiting apothecia, with long interwoven abundant well developed flexuous hyphoid expicular hairs, paraphyses with swollen apex, and ascospores that are smooth and eguttulatae are distinctive for this species.

https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/zc77ss578

ITS matches holotype, as well as macro and micro characters. Dave Largent uses Nolanea subcapitata, not Entoloma subcapitatum. For Dave's note on this find see the Humboldt Bay Mycological Society newsletter, Mycolog May 2022, page 10. Voucher collection is RHM-22-3.

Extensive group of stalked sporangia 1.2-1.5 mm high. Iridescent peridium; yellow nodes of calcium carbonate within the spore mass; spores brown in mass, lighter brown in transmitted light, minutely punctate with groups of darker warts, 8 microns
Found on decaying log of Exocarpus cupressformis in wet eucalypt forest.
This species regularly appears on this log, usually after rain in summer or early autumn.

Tiny!

No smell detectable.

In very moist soil packed in a crook under pictured chunk of wood.

Redbud, dogwood, maple, white oak, hornbeam.

—

Originally posted to Mushroom Observer on Oct. 28, 2021.

Found near Mirador el Roblar, El Sumidero

This collection represents a first country record of this species for Mexico, and only one of fewer than five records of the species away from the type locality in the Caribbean. The sequence is the first for this species (to our knowledge).