Latin name: Scitalis
Other names: Scytale
A serpent with such a marvelous appearance that it stuns the viewer

General Attributes
The scitalis is a serpent with such marvelous markings on its back that its appearance stuns the viewer, slowing the person down so that they are caught. Its heat is so great that it sheds its skin even in the winter.

Sources (chronological order)
Lucan [1st century CE] (Pharsalia, book 9, verse 841-842): “Sole of all serpents Scytale to shed / In vernal frosts his slough…”.

Isidore of Seville [7th century CE] (Etymologies, Book 12, 4:19): The scitalis (scytale) has a skin that shines with such variety that by these marks it slows down any who see it. It creeps slowly and cannot pursue its prey, so it stupifies with its marvelous appearance. It is so hot that even in winter it sheds its skin.

Source: Medieval Bestiary.

all the animals of Satan’s bestiary, assembled in a consistory and set as guard and crown of the throne that faced them, singing its glory in their defeat, fauns, beings of double sex, brutes with six-fingered hands, sirens, hippocentaurs, gorgons, harpies, incubi, dragopods, minotaurs, lynxes, pards, chimeras, cynophales who darted fire from their nostrils, crocodiles, polycaudate, hairy serpents, salamanders, horned vipers, tortoises, snakes, two-headed creatures whose backs were armed with teeth, hyenas, otters, crows, hydrophora with sawtooth horns, frogs, gryphons, monkeys, dog-heads, leucrota, manticores, vultures, paranders, weasels, dragons, hoopoes, owls, basilisks, hypnales, presters, spectafici, scorpions, saurians, whales, scitales, amphisbenae, iaculi, dipsases, green lizards, pilot fish, octopi, morays, and sea turtles.

Source: The Name of the Rose by Umberto Eco.