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Spiny Webcrust

Hyphodontia arguta · Family Hyphodontiaceae · Updated October 2026

374US records

30states

Octbusiest month

374 US records since 1826 (73 in the last 10 years)

Last seen Oct 20, 2020 (about 6 years ago) in Indiana Dunes State Park, IN, photographed by an iNaturalist user, with the ID agreed on by other iNaturalist users (research grade). Most US records come from New Jersey, New York and Pennsylvania, and the busiest months are Oct, Aug and Jul. (Data as of October 26, 2026; records can lag by weeks.)

⚠ Never eat a wild mushroom based on this site. We show where fungi have been recorded, nothing more. We never say any mushroom is edible or safe, and you shouldn't decide that from any website, app or photo. Many deadly mushrooms look like harmless ones. If someone may have eaten a wild mushroom, call Poison Control at 1-800-222-1222 right away.

Lookalike warning. Many mushrooms, including deadly ones, closely resemble each other, and the only reliable identification comes from an expert looking at the actual specimen (often with spore prints or microscopy). Never use a name, photo or record count on this page to decide what something is.

When it's recorded

Records by month, all years. Busiest: Oct, Aug, Jul.

Where it's recorded

State	Records	Latest sighting
New Jersey	192	Nov 3, 2019
New York	49	Sep 19, 2013
Pennsylvania	22	2019
Tennessee	19	Feb 8, 2020
Iowa	9	Oct 10, 1941
Ohio	9	Jul 19, 1977
Georgia	8	Mar 28, 2018
North Carolina	7	Jul 2, 1983
Mississippi	6	Jan 3, 1974
Washington	6	Oct 10, 2014
Minnesota	5	Aug 21, 2013
Michigan	5	Sep 17, 2016

Top counties

Sussex County, NJ (36) · latest Sep 28, 2019
Ocean County, NJ (29) · latest Oct 26, 2019
Mercer County, NJ (23) · latest May 4, 2019
Morris County, NJ (22) · latest Jul 20, 2019
Tompkins County, NY (21) · latest Oct 21, 1990
Onondaga County, NY (20) · latest 1890-11
Burlington County, NJ (19) · latest Oct 6, 2018
Hunterdon County, NJ (15) · latest Aug 25, 2019
Monmouth County, NJ (13) · latest Aug 22, 2015
Middlesex County, NJ (12) · latest Aug 18, 2019

Bring along

🍄

Regional mushroom field guideSee on Amazon

🍄

Folding mushroom knife with brushSee on Amazon

🍄

Wicker foraging basketSee on Amazon

🍄

10x hand lens / loupeSee on Amazon

🍄

Spore print paperSee on Amazon

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