Fauna
Fungus

Lobster Mushroom

Hypomyces lactifluorum

Also known as Lobster Fungus

Lobster mushrooms form when a parasitic fungus colonizes and completely transforms host mushrooms, turning their caps and stems into hard, bright reddish-orange structures. The parasite covers the host mushroom's gills, replacing them with a rough, pimpled crust containing tiny spore-producing chambers. They typically emerge from leaf litter in damp conifer and hardwood forests throughout late summer and autumn.

ParasiticOrangeAscomycete
Lobster Mushroom reference1 / 7
(c) Erlon Bailey, some rights reserved (CC BY-SA), uploaded by Erlon Bailey · cc-by-sa
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Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyRussula brevipes, Lactarius piperatus
Predators
  • Fungus gnat larvae
  • Slugs
  • Squirrels
ThreatsDeforestation and clearcutting
HabitatsConiferous and mixed hardwood forests
Life span2–4 weeks
Classification
  1. OrderHypocreales
  2. FamilyHypocreaceae
  3. GenusHypomyces
  4. SpeciesHypomyces lactifluorum
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Many wild mushrooms have toxic look-alikes; never ingest wild fungi based on identification apps alone.
Responsible observation
  • Observation: Look for bright reddish-orange patches pushing through forest leaf litter in late summer and autumn.
  • Identification: Examine the outer shell under a lens to spot tiny, pimple-like perithecia embedded across the surface.
  • Ecological Role: Observe how the parasite completely smothers the host mushroom's gills and halts its spore release.
Related species
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