Minhocão — Cryptid Encyclopedia

In the forests and river valleys of southern Brazil, 19th-century settlers encountered something that defied all natural history: enormous trenches and collapsed riverbanks that appeared overnight, as if something colossal had burrowed through the earth below. Trees toppled. Houses shifted on their foundations. And deep, wide tunnels — far too large for any known burrowing animal — appeared in soft ground near rivers and marshes.

The locals called it the Minhocão — Portuguese for "Big Earthworm." By their accounts, the creature was a titanic, worm-like animal reaching up to 150 feet in length and five feet in diameter, with dark, slimy skin, a segmented body, and — in some accounts — tentacle-like appendages near its mouth. It lived underground and in the muddy bottoms of rivers, surfacing only rarely.

German naturalist Fritz Müller collected multiple reports of the Minhocão in the 1870s and published them in scientific journals. One account described a Minhocão trapping a herd of cattle in a river bend by collapsing the banks on either side. Another described a creature surfacing in a river near the town of Lages, with "visible skin as thick as pine bark, black and shining."

Auguste de Saint-Hilaire, the renowned French botanist, also recorded accounts of the creature during his travels in Brazil, lending further credibility to the reports. Some naturalists speculated the Minhocão might be a surviving species of giant caecilian — a group of limbless amphibians that can reach several feet in length and live underground.

The reports tapered off in the early 20th century, possibly as deforestation and development drove the creature deeper underground — or into extinction. But in a country where new species are still regularly discovered in remote regions, the possibility that something enormous burrows beneath southern Brazil has never been fully ruled out.