Schistura densiclava

Schistura densiclava Latest News

A new species of cave-dwelling loach, named Schistura densiclava, has been discovered from the Krem Mawjymbuin cave in the East Khasi Hills district of Meghalaya.

About Schistura densiclava

• Schistura densiclava belongs to the family Nemacheilidae, a group of bottom-dwelling freshwater fishes known for adapting to benthic stream habitats.
• It is classified as a troglophile species, meaning it is adapted to live in cave environments but can also survive in surface (epigean) waters.
• Unlike most cave-dwelling species that lose pigmentation and eyesight, S. densiclavaretains both pigment and functional eyes, allowing it to adapt across environments.

Habitat Characteristics

• The fish was found in a cool, fast-flowing stream about 60 meters inside the Krem Mawjymbuin cave, where the temperature was 18°C and oxygen levels were low.
• The cave’s total surveyed length is approximately 1.6 km, and it is located at an altitude of 206 meters.
• The fish’s habitat is subterranean, indicating specialized adaptations to low-light and low-oxygen environments.

Morphological Features

• The body is pale yellow-green with 14–20 greyish black or faint black vertical bars.
• A thick dark stripe near the dorsal fin inspired the name “densiclava“, which translates to “thick stripe” in Latin.
• Sexual dimorphism is noted:
  • Males are slimmer, with irregular patterns and puffier cheeks.
  • Females are sturdier, with more consistent markings.

Endemism and Conservation Insight

• Genetic testing confirmed that Schistura densiclava is a distinct, previously unrecorded species.
• Its distribution is restricted to a single cave, indicating a high degree of endemism.
• It becomes Meghalaya’s sixth known cave-dwelling fish species, highlighting the state’s rich subterranean biodiversity.

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Schistura densiclava FAQs

Q1: What is Schistura densiclava?
Ans:Schistura densiclava is a newly recorded species of freshwater stone loach fish found in the rivers of Meghalaya.

Q2: Where was Schistura densiclava recently identified?
Ans: It was recently recorded in the Mawjymbuin cave in the East Khasi Hills district in Meghalaya.

Q3: Which family does Schistura densiclava belong to?
Ans: It belongs to the family Nemacheilidae, commonly known as stone loaches.

Source: TH