EN

Arachnothryx calycophylla

Declining

Overview

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

Arachnothryx calycophylla faces severe pressure from agricultural expansion and cattle ranching activities that have fragmented its montane forest habitat in Costa Rica. The species' restricted range makes it particularly vulnerable to localized habitat destruction, while climate change poses additional risks by altering the temperature and moisture conditions of its cloud forest environment. Urban development pressures in the Central Valley region continue to encroach upon remaining forest fragments where this endemic shrub persists.

Threat summary

Habitat

This endemic Costa Rican shrub inhabits montane cloud forests and humid premontane forests at elevations between 1,200-2,000 meters. It typically grows in the understory of primary and secondary forests with high humidity and consistent cloud cover.

Other threatened species in RUBIACEAE

EN

Arachnothryx tacanensis

Declining
CR

Arachnothryx tenorioi

Unknown
VU

Aidia abeidii

Unknown
EN

Arachnothryx tuxtlensis

Declining

Threatened in Colombia

EN

Helena's Marsupial Frog

Gastrotheca helenae

Stable
VU

Cavendishia macrocephala

Unknown
EN

Cavendishia sessiliflora

Unknown
VU

Macleania crassa

Unknown

Frequently asked questions

Why is Arachnothryx calycophylla classified as Endangered?
Arachnothryx calycophylla is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Arachnothryx calycophylla faces severe pressure from agricultural expansion and cattle ranching activities that have fragmented its montane forest habitat in Costa Rica. The species' restricted range makes it particularly vulnerable to localized habitat destruction, while climate change poses additional risks by altering the temperature and moisture conditions of its cloud forest environment. Urban development pressures in the Central Valley region continue to encroach upon remaining forest fragments where this endemic shrub persists.
Where does Arachnothryx calycophylla live?
Arachnothryx calycophylla occurs in Colombia, and Venezuela. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Arachnothryx calycophylla?
The main threats to Arachnothryx calycophylla 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.

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