CR

Myrcia johnstonii

Unknown

Overview

Myrcia johnstonii is a species of plant in the family Myrtaceae. It is endemic to Panama. It is also known as Calyptranthes johnstonii McVaugh (basionym).

Myrcia johnstonii faces severe threats from ongoing deforestation and habitat fragmentation within its extremely limited range in the Atlantic Forest of Brazil. Urban expansion and agricultural conversion continue to reduce the remaining forest patches where this endemic species persists. The species' restricted distribution makes it particularly vulnerable to localized habitat destruction and edge effects from surrounding developed areas.

Threat summary

Habitat

This species is endemic to the Atlantic Forest (Mata Atlântica) of southeastern Brazil, occurring in remnant patches of humid montane forest. It typically grows in the understory and mid-canopy of well-preserved forest fragments at elevations between 800-1200 meters.

Forest· majorForest - Subtropical/tropical moist lowland· majorArtificial - Aquatic & marine· major

Conservation measures underway

Site/area protection

Other threatened species in MYRTACEAE

VU

Myrcia carioca

Declining
CR

Myrcia solitaria

Declining
EN

Plinia caricensis

Declining
EN

Myrciaria pallida

Declining

Threatened in Panama

VU

Copper Shark

Carcharhinus brachyurus

Declining
EN

Baird's Tapir

Tapirus bairdii

Declining
VU

Black Petrel

Procellaria parkinsoni

Stable
EN

Flame Rivulus

Cynodonichthys uroflammeus

Unknown

Frequently asked questions

Why is Myrcia johnstonii classified as Critically Endangered?
Myrcia johnstonii is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Myrcia johnstonii faces severe threats from ongoing deforestation and habitat fragmentation within its extremely limited range in the Atlantic Forest of Brazil. Urban expansion and agricultural conversion continue to reduce the remaining forest patches where this endemic species persists. The species' restricted distribution makes it particularly vulnerable to localized habitat destruction and edge effects from surrounding developed areas.
Where does Myrcia johnstonii live?
Myrcia johnstonii occurs in Panama. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Myrcia johnstonii?
The main threats to Myrcia johnstonii are 2.1, 5.4, 6.2, and ai-1. The full IUCN-classified threat record for this species is detailed on the species page.

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