New Earthworm Species Drawida vazhania Discovered in Kerala

Researchers have recently discovered a new species of earthworm named Drawida vazhania in Kerala’s Peechi-Vazhani Wildlife Sanctuary. The species was identified near the Vazhani Dam area in Thrissur district. The discovery highlights the rich but still underexplored biodiversity of the Western Ghats, a globally recognised biodiversity hotspot. The identification of this species contributes to the scientific understanding of soil biodiversity and ecological diversity in India.

Location of the Discovery

The new earthworm species was discovered in the Vazhani Dam region located within the Peechi-Vazhani Wildlife Sanctuary in Thrissur district of Kerala. This sanctuary forms part of the Western Ghats mountain range, which is known for its high levels of endemism and species diversity. The discovery emphasises the ecological importance of protected forest ecosystems in preserving lesser-known soil organisms.

Taxonomic Classification

Drawida vazhania belongs to the genus Drawida, which is mainly distributed across South, Southeast and East Asia. The species falls under the family Moniligastridae. Members of this genus are typically found in tropical and subtropical regions. The newly identified species is categorised within the Barwelli species group and is characterised by a relatively small body size.

Distinctive Biological Features

The species can be distinguished from other members of the Barwelli group through several anatomical characteristics. These include a grooved male genital field, a kidney- or bean-shaped prostate gland, a narrow tubular C-shaped prostatic capsule and a small sessile atrium located on the body wall. These reproductive and structural features play a crucial role in identifying and classifying earthworm species.

Important Facts for Exams

• Drawida vazhania is a newly discovered earthworm species from Kerala.
• It was identified near Vazhani Dam in the Peechi-Vazhani Wildlife Sanctuary, Thrissur district.
• The species belongs to the genus Drawida and family Moniligastridae.
• With this discovery, the number of Drawida species recorded from India has increased to 83, including 55 from the Western Ghats.

Significance for Biodiversity Studies

The discovery of Drawida vazhania adds to the growing inventory of earthworm diversity in India and particularly in the Western Ghats region. Earthworms play an essential role in maintaining soil fertility, nutrient cycling and ecosystem functioning. The finding highlights the need for continued biological surveys and conservation efforts to document and protect the region’s hidden biodiversity.