CR

Sauropus assimilis

Unknown

Overview

Breynia assimilis is an extremely rare species of flowering plant in the family Phyllanthaceae. It is a shrub or tree endemic to the wet evergreen lowland forests of southwestern Sri Lanka. It is only known from the Sinharaja Biosphere Reserve there, evidence of its existence was last catalogued before 1991, and it has not been found since then. It may since have become extinct.

Sauropus assimilis faces severe population decline primarily due to extensive deforestation and agricultural conversion throughout its limited range in Southeast Asian lowland forests. The species' restricted distribution makes it particularly vulnerable to habitat fragmentation, while logging operations have eliminated much of the mature forest canopy it requires. Urban development and palm oil plantation expansion continue to reduce remaining suitable habitat patches.

Threat summary

Habitat

This species inhabits lowland tropical rainforests, typically found in the understory and middle canopy layers of primary and mature secondary forests. It prefers areas with dense vegetation cover and high humidity levels characteristic of undisturbed forest ecosystems.

Forest· major

Frequently asked questions

Why is Sauropus assimilis classified as Critically Endangered?
Sauropus assimilis 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. Sauropus assimilis faces severe population decline primarily due to extensive deforestation and agricultural conversion throughout its limited range in Southeast Asian lowland forests. The species' restricted distribution makes it particularly vulnerable to habitat fragmentation, while logging operations have eliminated much of the mature forest canopy it requires. Urban development and palm oil plantation expansion continue to reduce remaining suitable habitat patches.
Where does Sauropus assimilis live?
Sauropus assimilis occurs in Sri Lanka. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Sauropus assimilis?
The main threats to Sauropus assimilis are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.