the.com/worm lizard

a reptile that ditched its legs to become the underground's best impersonator of spaghetti.

means A worm lizard is a burrowing reptile (an amphisbaenian) that looks like a large earthworm, with a ringed, segmented-looking body, usually no legs, and reduced eyes from a life spent tunneling underground.

from The English name simply pairs "worm" with "lizard," describing exactly what the creature resembles. The scientific name, amphisbaenian, comes from the Greek Amphisbaena — a mythical serpent said to have a head at each end (from amphis, "both ways," and bainein, "to go"). Ancient writers imagined it could move in either direction, and the real animal earns the comparison: its blunt tail looks much like its head, so it genuinely seems to crawl both ways.

not a lizard
They're amphisbaenians, their own ancient reptile lineage.
both ends
Genus name means it can move backward and forward.
skull builders
Some shovel tunnels using reinforced battering-ram heads.
rare legs
One family kept tiny front limbs, the rest went limbless.
hidden eyes
Skin-covered eyes detect only light and shadow.
for instance

amphisbaena — legless burrowing lizard found in central and south america, africa, and mediterranean region with eyes covered by scales

bipes biporus — mexican worm lizard with only front limbs, endemic to mexico's pacific coast region

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