CR

Xanthophyllum longum

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

Xanthophyllum longum faces severe population decline primarily due to extensive deforestation and habitat conversion for palm oil plantations across its limited range in Malaysian Borneo. The species' restricted distribution makes it particularly vulnerable to localized habitat destruction, with remaining populations fragmented into increasingly isolated forest patches. Mining activities and infrastructure development have further reduced available habitat, while the species' specific ecological requirements limit its ability to adapt to degraded environments.

Threat summary

Habitat

Xanthophyllum longum is endemic to the lowland and hill dipterocarp forests of Borneo, typically found in primary and mature secondary forests at elevations up to 800 meters. The species requires well-drained soils and is associated with the diverse canopy structure of intact tropical rainforest ecosystems.

Forest· major

Conservation measures underway

Site/area protectionResource & habitat protectionSpecies recoveryEx-situ conservation

Other threatened species in POLYGALACEAE

VU

Xanthophyllum crassum

Stable
VU

Polygala francisci

Unknown
VU

Xanthophyllum lineare

Stable
VU

Polygala zambesiaca

Unknown

Threatened in Malaysia

Acropora hemprichiiEN

Acropora hemprichii

Declining
VU

Podocarpus ridleyi

Declining
EN

Benstonea saint-johnii

Unknown
VU

Hopea coriacea

Declining

Frequently asked questions

Why is Xanthophyllum longum classified as Critically Endangered?
Xanthophyllum longum 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. Xanthophyllum longum faces severe population decline primarily due to extensive deforestation and habitat conversion for palm oil plantations across its limited range in Malaysian Borneo. The species' restricted distribution makes it particularly vulnerable to localized habitat destruction, with remaining populations fragmented into increasingly isolated forest patches. Mining activities and infrastructure development have further reduced available habitat, while the species' specific ecological requirements limit its ability to adapt to degraded environments.
Where does Xanthophyllum longum live?
Xanthophyllum longum occurs in Malaysia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Xanthophyllum longum?
The main threats to Xanthophyllum longum 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.