On a routine forest patrol in Karnataka’s Mookambika Wildlife Sanctuary, beat forester Ajmeer K noticed something that many people might have walked past.
“A freshwater crab moved across the forest floor, but its colour and unusual movement caught his attention. He, who regularly patrols the forests of the Kollur range, decided to look closer. That small moment of inquisitiveness has now led to the scientific discovery of a new species,” as reported by The Times of India.
The crab has been named Ghatiana karnataka, and its discovery adds another chapter to what scientists already know about the extraordinary biodiversity of the Western Ghats. Ajmeer co-authored the scientific description with Santanu Mitra of the Zoological Survey of India. Their research was recently published in the journal Species.
It began with a closer look
Ajmeer first noticed the crab during a patrol in the Kollur range last year. Its unusual colour and the way it moved made him curious enough to investigate instead of simply continuing on his route.
He contacted Santanu, who also suspected that the crab might represent an undocumented species.
Following the necessary permissions from the forest department, specimens were collected for a detailed taxonomic study. Researchers examined both male and female crabs, documenting their physical characteristics, colouration and habitat before confirming the species as new to science.
The crab has been named Ghatiana karnataka, and its discovery adds another chapter. Photograph: (Deccan Herald)
That process matters because spotting an unfamiliar animal is only the beginning. To establish a new species scientifically, researchers have to show that it is distinct from species already known.
Meet Ghatiana karnataka
The newly described crab belongs to the genus Ghatiana, a group of freshwater crabs found only in the Western Ghats.
The male has a predominantly dark-purple body with a striking light-pink to mauve V-shaped marking on the front of its shell, known as the carapace. Females look different, with a grey-violet front and dark grey-brown rear.
The species is currently confirmed from Mavinakaru, near Kollur, although Ajmeer’s observations suggest that similar crabs occur across a much wider stretch of forest.
Hidden among rocks and trees
These crabs are not animals one is likely to notice easily.
They live in highly moist evergreen and semi-evergreen forests, making use of tiny natural shelters created by the landscape. They have been found in crevices between boulders, water-filled holes in laterite rocks, and damp cavities in trees.
The surrounding landscape is kept humid by perennial rivers including the Souparnika, Mavinakaru, and Jadkal. During the monsoon, the crabs may venture across wet laterite rocks. When the forest becomes drier, they retreat into moist tree hollows and rock cavities.
Their diet is just as closely tied to the forest. Decaying plant matter, bark, algae, and other organic material provide food.
Not the first Ghat crab from Karnataka
The discovery is significant, but it is also a reminder of how much remains to be documented in the Western Ghats.
The genus Ghatiana now has 15 known species, all endemic to the Western Ghats. “With Ghatiana karnataka, Karnataka has eight recorded species in the genus,” according to The Times of India.
Ajmeer first noticed the crab during a patrol in the Kollur range last year. Photograph: (Wikipedia (representational image))
This is not the first time an unexpected freshwater crab has appeared from Karnataka’s forests. Earlier discoveries have included other Ghatiana species, some found by forest staff and naturalists who noticed unusual crabs during their time in the field.
A name for a state’s biodiversity
Ajmeer initially hoped the crab might be named after the area where it was found.
Instead, Mitra suggested Karnataka as its species name, recognising the state’s extraordinary biodiversity.
For Ajmeer, the discovery also reflects something more personal. Originally from Hosapete in Vijayanagara district, he holds a BA degree and has developed a strong interest in documenting the wildlife he encounters during his forest duties. His role may be described as that of a beat forester, but his daily work puts him in places that scientists cannot always reach regularly.
Every patrol can bring him face to face with something unusual.
There is still so much to find
The observation of Ghatiana, Karnataka, is more than the addition of another name to a scientific list. It shows how much the Western Ghats can still reveal when people pay attention to the small details around them.
A crab hiding inside a damp tree cavity may seem insignificant against the vastness of a rainforest. But it can represent a species that science had not formally recognised before.
Researchers examined both male and female crabs, documenting their physical characteristics, colouration and habitat before confirming the species. Photograph: (Deccan Herald)
Kundapur Deputy Conservator of Forests Ruthren P said the discovery highlights how much of the region’s biodiversity remains undocumented. He also stressed that forest staff who take an interest in research and biodiversity should be encouraged and supported, as reported by The Times of India.
For Ajmeer, it began with something wonderfully simple. He noticed a crab that looked different. And instead of walking past it, he stopped to find out why.
