What Happened
- Scientists have rediscovered Myiophanes kempi, a rare thread-legged assassin bug from the subfamily Emesinae (family Reduviidae), approximately 100 years after its last documented sighting.
- The species was first recorded from Siju Cave in Assam (now Meghalaya) in 1924 by British entomologist W.E. China, and had not been encountered scientifically since.
- Two male specimens were collected during a 2019 systematic survey of limestone caves in the Andaman Islands — over 1,000 km southeast of the original discovery site.
- The rediscovery was published in the journal Subterranean Biology in February 2026, extending the known distribution of the species significantly and confirming it inhabits cave ecosystems across geographically distant locations.
- The finding highlights the rich but severely under-surveyed biodiversity of India's subterranean (cave) ecosystems, especially in the Andaman and Nicobar Islands.
Static Topic Bridges
Subterranean (Cave) Biodiversity and Troglobites
Caves represent among the most poorly explored habitats on Earth. Organisms that have evolved to live exclusively in caves are called troglobites (for animals) or stygobites (for aquatic cave species). These species have typically undergone regressive evolution — losing eyes and pigmentation — and gaining enhanced sensory organs and metabolic adaptations for life in permanent darkness.
- Thread-legged assassin bugs (Emesinae) are a subfamily of Reduviidae (assassin bugs) characterised by their extremely elongated, thread-like legs and slender bodies — adaptations for stealth predation.
- Cave species are often highly specialised to microhabitat conditions (temperature, humidity, food source) making them extremely vulnerable to any disruption of cave ecology.
- India's cave biodiversity is concentrated in the limestone karst formations of Meghalaya (Jaintia, Khasi hills), the Andaman Islands, and parts of Karnataka and Maharashtra.
- Limestone caves are formed through the dissolution of carbonate rock (karst topography) — a process that can take thousands of years; they provide stable micro-climates that shelter highly specialised fauna.
Connection to this news: Myiophanes kempi's preference for limestone caves in both Meghalaya and the Andaman Islands suggests a shared subterranean niche with a distribution likely broader than documented — a pattern common among troglobitic species that remain invisible to surface surveys.
Rediscovery, Taxonomy, and the Lazarus Species Phenomenon
In conservation biology, a "Lazarus species" (or Lazarus taxon) is an organism that was believed extinct or lost to science but is subsequently rediscovered. Such discoveries have dual significance: they may revise extinction assessments and also highlight how inadequately explored certain ecosystems remain.
- Lazarus species rediscoveries can influence the IUCN Red List categorisation — species downgraded from "Extinct" to "Critically Endangered" or "Data Deficient" upon rediscovery.
- The IUCN Red List uses nine categories: Extinct (EX), Extinct in the Wild (EW), Critically Endangered (CR), Endangered (EN), Vulnerable (VU), Near Threatened (NT), Least Concern (LC), Data Deficient (DD), and Not Evaluated (NE).
- India is a megadiverse country — one of 17 recognised by Conservation International — harbouring approximately 7–8% of the world's recorded species despite covering only 2.4% of the world's land area.
- Taxonomy (the classification of organisms) and systematic surveys are fundamental to conservation planning; species that are unknown cannot be protected.
Connection to this news: Myiophanes kempi's rediscovery is scientifically significant not just for its biology, but for what it implies about the conservation status of cave fauna — it may represent a broader category of species that are not extinct but merely undiscovered due to inadequate cave surveys.
Andaman and Nicobar Islands: Biodiversity Hotspot and Sensitive Ecosystem
The Andaman and Nicobar Islands form one of India's most ecologically sensitive regions. The islands are part of the Indo-Burma Biodiversity Hotspot and house a high degree of endemism — species found nowhere else on Earth.
- The Andaman Islands are oceanic islands formed from the submerged mountain chain of the Arakan Yoma range, providing unique biogeographic isolation that drives speciation.
- The islands host tropical rainforests, mangroves, coral reefs, seagrass meadows, and cave ecosystems — a range of habitat diversity that supports extraordinary biodiversity.
- They fall within the Biodiversity Hotspot concept defined by Norman Myers (1988, updated 2000): regions with at least 1,500 endemic vascular plant species and that have lost at least 70% of their original habitat.
- India has two designated biodiversity hotspots: the Himalaya and the Western Ghats + Sri Lanka hotspot; the Indo-Burma hotspot covers parts of northeastern India including the Andaman and Nicobar Islands.
Connection to this news: The discovery of a previously "lost" bug in Andaman limestone caves reinforces the ecological argument for protecting cave habitats in the islands — habitats not typically covered by forest cover-based conservation metrics.
Key Facts & Data
- Species: Myiophanes kempi (Family Reduviidae, Subfamily Emesinae)
- First recorded: 1924, Siju Cave, Assam (now Meghalaya), by W.E. China
- Rediscovered: 2019, Andaman Islands limestone caves (published February 2026)
- Range extension: over 1,000 km from original discovery site
- Publication: Subterranean Biology journal
- India's share of global species: ~7–8% of recorded species on 2.4% of land area
- India is one of 17 megadiverse countries (Conservation International)
- Andaman and Nicobar: part of Indo-Burma Biodiversity Hotspot