402 / Mesozoic
Archaeomarasmius
Archaeomarasmius leggettii
A slender stem and tiny cap already resembled marasmioid mushrooms.
View original image · 1600 × 1067- Time range
- About 94–90 million years ago
- Final stage
- Late Cretaceous
- Geographic range
- Resin-forest litter · North America
01 / DEFINITION & ECOLOGY
What was Archaeomarasmius?
Archaeomarasmius (Archaeomarasmius leggettii) was an extinct organism known from About 94–90 million years ago, with a range in Resin-forest litter · North America.
Life and ecology
It probably decomposed conifer and early flowering-plant litter.
02 / DISAPPEARANCE
Why did Archaeomarasmius disappear?
Cretaceous forest turnover is possible context; a single amber specimen cannot show why the species disappeared.
03 / EVIDENCE
How do scientists know about Archaeomarasmius?
New Jersey amber preserves the complete fruiting body and gills, but not underground mycelium.
04 / SOURCES & FURTHER READING
Check the source record
Use the scientific name to compare taxonomy, occurrence records and the fossil record. Database coverage and classifications may differ.
05 / REVISION HISTORY
How has this record changed?
- Rewrote an extinction cause that presented environmental or faunal turnover as established; it is now given as context the record does not prove.
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS