Kani maranjandu: First Record of the Tree-Dwelling Crab from Agumbe

Research paper: on the Springer page 2 May 2026 • News: Asianet Newsable, 8 July 2026
Prelims • Environment, Biodiversity and Taxonomy

Why in the News

According to Asianet Newsable (8 July 2026), the first record of Kani maranjandu, India's only tree-dwelling freshwater crab, has been registered from Agumbe in Karnataka. The research paper was published in National Academy Science Letters on 2 May 2026. That is, the news came about two months after the research paper.

What Does the Research Paper Say?

The research paper's title is "Range Extension and Behavioral Observations of Kani maranjandu Kumar, Raj & Ng, 2017 (Decapoda: Brachyura: Gecarcinucidae) from the Central Western Ghats" and it is a Short Communication. According to the abstract, the authors gave the species' first new record from the Central Western Ghats (Agumbe, Karnataka), a significant extension about 566 km to the north of the distribution known in Kerala. They also documented the species' possible ground-dwelling behaviour, which was not recorded earlier, and stated the need for more surveys to assess ecology and conservation status.

According to the page's reference list, the species' original description was done by Kumar, Raj and Ng (2017) in the Journal of Crustacean Biology, whose title concerns a new genus and new species of a fully tree-dwelling crab.

According to Asianet Newsable, until now the species was considered known only from the Agasthyamalai Biosphere Reserve in Kerala. According to the report, it is a crab of the Gecarcinucidae family, lives in water-filled tree hollows, has long legs and an oval carapace, and its food is leaves, seeds, insects and slugs. In Agumbe it was found near a Myristica swamp, and according to the researchers it may come down from the tree in search of a mate or shelter during the monsoon.

Where Does Confusion Arise in the Exam?

This is not a "new discovery", it is a "new record": the species was already described in 2017. Also, a new observation has come on the assumption of its being "fully tree-dwelling"; the abstract calls it "possible" ground behaviour. The details of diet, the Myristica swamp, the monsoon explanation and appearance are from the press, not from the abstract.

Direction of Preparation from Previous Questions:

The official General Studies Paper-I of UPSC Prelims 2023 included statement-based questions. So prepare the difference between species, place and the type of record. The questions below are original practice, not actual PYQs.

Prelims Style: Practice Questions

Sources:

1. National Academy Science Letters: Range Extension and Behavioral Observations of Kani maranjandu (Decapoda: Brachyura: Gecarcinucidae) from the Central Western Ghats, 2 May 2026.
2. Asianet Newsable: India's Only Tree-Dwelling Freshwater Crab Found in Karnataka's Agumbe, 8 July 2026.
3. UPSC: Prelims 2023, question format.