Newly Discovered Gecko’s Giant Breakaway Scales Help It Flee Predators

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This newly discovered gecko species from Madagascar is a master escape artist.

It’s extremely fast. Like other lizards, it can lose its tail and grow a new one. And it can shed its scales — the largest of any gecko — in order to flee a predator.

Researchers from the U.S., Germany and Colombia described the species Geckolepis megalepis in the journal PeerJ. But as lead author Mark D. Scherz tells The Two-Way, a skilled escape artist is an “absolute nightmare” to study.

A scientist who studies geckos is bound to be adept at catching them — but with this species, “if you grab it, those scales are only there for a fraction of a second,” before they slide off in your hand, says Scherz, a PhD candidate at the Ludwig Maximilian University of Munich. Even the most careful handling using cotton balls can still cause damage to the creatures.

Scales and scale counting are typically “the gold standard for most reptile recognition,” Scherz adds. But because the scales were not reliable and extremely delicate, the scientists turned to something more stable — the skeleton. They carried out bone analysis usingmicro-computed tomography to identify the characteristics of the new species. The method also meant that they were not damaging the fragile specimen.

Other members of the genus have large scales — until this species, the largest measured covered about five percent of its body length. Geckolepis megalepis has scales that each cover an astonishing eight percent of its body length, Scherz says.

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