CR

Knobbly-winged Fungus Weevil

Homoeodera nodulipennis

Unknown

Overview

Homoeodera nodulipennis is a critically endangered beetle species belonging to the family Cerambycidae, commonly known as longhorn beetles. This species is characterized by distinctive nodular structures on its wing covers (elytra), which give it its scientific name. The beetle is endemic to specific forest ecosystems where it depends on particular host tree species for larval development.

Adult beetles are wood-boring insects, with larvae that develop within the wood of their host trees over extended periods. The species has an extremely limited distribution range, making it particularly vulnerable to environmental changes. Primary threats to H.

nodulipennis include habitat loss due to deforestation, logging activities, and forest fragmentation. Climate change poses additional risks by altering the composition and health of forest ecosystems that support both the beetle and its host trees. The species' specialized ecological requirements and likely slow reproductive rate contribute to its vulnerability.

Urban development and agricultural expansion in areas adjacent to its habitat create further pressure on remaining populations. Due to its cryptic nature and specific habitat requirements, comprehensive population surveys are challenging to conduct, resulting in limited data on current population size and trends. Conservation efforts focus on habitat protection and forest management practices that maintain the ecological conditions necessary for the species' survival.

Research initiatives aim to better understand the beetle's life cycle, host plant relationships, and specific habitat requirements to inform targeted conservation strategies.

Homoeodera nodulipennis faces severe threats from habitat destruction caused by deforestation and logging activities that remove its host trees. Forest fragmentation and urban development further reduce available habitat and isolate remaining populations. Climate change compounds these pressures by altering forest ecosystems and potentially affecting the health of host tree species.

Threat summary

Habitat

This species inhabits mature forest ecosystems where it depends on specific host tree species for reproduction and larval development. The beetles require well-established woodland environments with suitable dead or dying wood for breeding sites.

Conservation measures underway

Site/area protectionSpecies management

Frequently asked questions

Why is Knobbly-winged Fungus Weevil classified as Critically Endangered?
Knobbly-winged Fungus Weevil 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. Homoeodera nodulipennis faces severe threats from habitat destruction caused by deforestation and logging activities that remove its host trees. Forest fragmentation and urban development further reduce available habitat and isolate remaining populations. Climate change compounds these pressures by altering forest ecosystems and potentially affecting the health of host tree species.
Where does Knobbly-winged Fungus Weevil live?
Knobbly-winged Fungus Weevil occurs in St. Helena. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Knobbly-winged Fungus Weevil?
The main threats to Knobbly-winged Fungus Weevil are 11.1, and 8.1. The full IUCN-classified threat record for this species is detailed on the species page.

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