CR

Shorea teysmanniana

Declining

Overview

Rubroshorea teysmanniana is a timber tree of the family Dipterocarpaceae. It occurs in Sumatra, Peninsular Malaysia and Borneo.

Shorea teysmanniana faces severe population decline primarily due to extensive logging operations targeting its valuable timber across Borneo's lowland forests. Large-scale conversion of its native dipterocarp forest habitat to oil palm plantations has eliminated vast areas of suitable habitat, while remaining forest fragments are increasingly isolated and degraded. The species' slow growth rate and specific ecological requirements make recovery extremely difficult once populations are reduced.

Threat summary

Habitat

This critically endangered dipterocarp tree is endemic to the lowland tropical rainforests of Borneo, typically occurring in primary and mature secondary forests at elevations below 500 meters. It grows in mixed dipterocarp forest communities on well-drained soils, often associated with other threatened Shorea species in these biodiverse ecosystems.

Forest· majorForest - Subtropical/tropical swamp· majorWetlands (inland) - Bogs, marshes, swamps, fens· majorMarine neritic· major

Conservation measures underway

Site/area protectionSpecies recoveryEx-situ conservation

Other threatened species in DIPTEROCARPACEAE

VU

Hopea coriacea

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VU

Shorea polyandra

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CR

Parashorea globosa

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EN

Dipterocarpus semivestitus

Declining

Threatened in Brunei

EN

Montipora calcarea

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EN

Wrinkled Hornbill

Rhabdotorrhinus corrugatus

Declining
VU

Gonystylus xylocarpus

Declining

Frequently asked questions

Why is Shorea teysmanniana classified as Critically Endangered?
Shorea teysmanniana 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. Shorea teysmanniana faces severe population decline primarily due to extensive logging operations targeting its valuable timber across Borneo's lowland forests. Large-scale conversion of its native dipterocarp forest habitat to oil palm plantations has eliminated vast areas of suitable habitat, while remaining forest fragments are increasingly isolated and degraded. The species' slow growth rate and specific ecological requirements make recovery extremely difficult once populations are reduced.
Where does Shorea teysmanniana live?
Shorea teysmanniana occurs in Brunei, Indonesia, and Malaysia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Shorea teysmanniana?
The main threats to Shorea teysmanniana are 2.1, 5.3, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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