CR

Patu silho

Unknown

Overview

Patu silho is a minute species of goblin spider belonging to the family Oonopidae, a group renowned for containing some of the smallest spiders on Earth. Known only from a very restricted range in Colombia, this species inhabits leaf litter and soil-surface microhabitats within tropical forest ecosystems, where its tiny size and cryptic coloration make it exceptionally difficult to detect and study. As with many goblin spiders, Patu silho likely depends on consistently moist, shaded forest floor conditions to survive, making it highly sensitive to changes in canopy cover and local humidity.

The species is classified as Critically Endangered (CR) by the IUCN, reflecting the severe restriction of its known range and the ongoing pressures facing its forest habitat. Deforestation, agricultural conversion, and habitat fragmentation in the region pose significant risks to the small, isolated populations on which this spider depends. Because of its diminutive size and the general lack of taxonomic and ecological research on goblin spiders, comprehensive population surveys remain limited, and much of its natural history is still poorly understood.

On a positive note, increased taxonomic interest in Oonopidae over the past two decades has led to greater documentation of range-restricted spider species like Patu silho, improving the baseline data available for future conservation assessments. Continued biodiversity surveys and habitat protection efforts in Colombia's forest ecosystems offer a meaningful opportunity to safeguard the remaining habitat this species relies on, and growing awareness of invertebrate conservation is helping elevate the profile of overlooked taxa such as this one within broader regional conservation planning.

Patu silho faces severe threats from habitat destruction due to urban development and agricultural expansion in its limited range. The species' extremely small size and specialized microhabitat requirements make it particularly vulnerable to environmental disturbances. Deforestation and land conversion for human activities have fragmented the remaining suitable habitat patches, while climate change may alter the delicate moisture and temperature conditions this tiny spider requires for survival.

Threat summary

Habitat

Patu silho inhabits leaf litter and low vegetation in tropical forests, requiring specific microhabitat conditions with appropriate moisture levels and temperature ranges. This minute spider is found in undisturbed forest floor environments where it can construct its tiny webs among decomposing organic matter.

Forest· majorForest - Subtropical/tropical moist montane· majorMarine neritic· major

Conservation measures underway

Site/area protection

Frequently asked questions

Why is Patu silho classified as Critically Endangered?
Patu silho 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. Patu silho faces severe threats from habitat destruction due to urban development and agricultural expansion in its limited range. The species' extremely small size and specialized microhabitat requirements make it particularly vulnerable to environmental disturbances. Deforestation and land conversion for human activities have fragmented the remaining suitable habitat patches, while climate change may alter the delicate moisture and temperature conditions this tiny spider requires for survival.
Where does Patu silho live?
Patu silho occurs in Seychelles. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Patu silho?
The main threats to Patu silho are 11.1, 8.1, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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