The 10 Hardest to Pronounce (and Spell) Prehistoric Animals

The 10 Hardest to Pronounce (and Spell) Prehistoric Animals

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Paleontologists have identified literally thousands of prehistoric animals-and for every memorable dinosaur like Tyrannotitan or Raptorex, there are three or four prehistoric beasts saddled with clumsy names like Opisthocoelicaudia or Dolichorhynchops.

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Allaeochelys Fossil -- Museum of Natural History, Freiburg.

Ghedoghedo/Wikimedia Commons

How much of a mouthful is Allaeochelys? Well, this prehistoric turtle (pronounced AH-lah-ee-OCK-ell-is or AH-la-EE-oh-KELL-iss, take your pick) briefly made headlines when paleontologists identified nine separate specimens of males and females being fossilized in the act of mating. The story quickly faded--copy editors don't much enjoy spell-checking 47-million-year-old reptiles--and we haven't heard much of Allaeochelys since. (Why were there so many casualties in flagrante delicto? Perhaps these turtles expired of old age whilst trying to pronounce each others' names.)

02of 10


Illustration of the maniraptoran ((dinosaur Epidexipteryx, here depicted with hands which is characteristic for members of the theropod family Scansoriopterygidae.

Conty/Wikimedia Commons

Evolutionarily speaking, Epidexipteryx (EP-ih-dex-IP-teh-ricks) seems to have existed for the sole purpose of making the closely related Archaeopteryx seem more pronounceable. This "dino-bird" predated its more famous cousin by millions of years and was equipped with a spray of strictly ornamental feathers jutting out of its tail. Its name, Greek for "display feather," evokes a genetically engineered nasal decongestant, but Epidexipteryx may well have been a crucial link in the evolutionary chain connecting ancient dinosaurs and modern birds.

03of 10


Huehuecanauhtlus tiquichensis, a hadrosauroid dinosaur from the Santonian (Late Cretaceous) of Michoacán, Mexico.

Karkemish/Wikimedie Commons

Not only is Huehuecanauhtlus nearly impossible to spell or pronounce; it's difficult for the average person even to identify the language from which this duck-billed dinosaur's name derives. The answer is Aztec--the same tongue that gave us the giant pterosaur Quetzalcoatlus--and the name (pronounced WAY-way-can-OUT-luss) translates as "ancient duck." As you may have surmised, the "type fossil" of Huehuecanauhtlus was discovered in Mexico, from whence Aztec civilization disappeared hundreds of years ago under the onslaught of European settlers.

04of 10


Esqueleto y reconstrucción del Onychonycteris Finneyi.

Loana Riboli/Wikimedia Commons

Onychonycteris (OH-nick-oh-NICK-teh-riss) is another good example of how a perfectly reasonable English phrase (in this case, "clawed bat") can be rendered nearly unpronounceable when translated into standard Greek genus format. You may not be surprised to learn that this Eocene bat was closely related to Icaronycteris, but paleontologists were intrigued to discover that the slightly earlier Onychonycteris had a more primitive inner-ear structure--meaning that bats likely evolved the ability to fly before they evolved the ability to echolocate.

05of 10


Life restoration of Phlegethontia longissima.

Smokeybjb/Wikimedia Commons

The most frustrating thing about Phlegethontia (FLEG-eh-THON-tee-ah) is trying to figure out what this prehistoric creature's name is supposed to mean. The "phleg" part evokes the Greek root for "phlegm" and "phlegmatic," but "thont?" It's a mystery, as you can determine for yourself with a quick web search. Whatever the case, the three-foot-long Phlegethontia was a limbless amphibian that prowled the swamps of late Carboniferous Eurasia; over a century ago, it was known by the slightly more pronounceable name Dolichosoma, meaning "long body".

06of 10


Phthinosuchus discors, author - D. Bogdanov.

DiBgd/Wikimedia Commons

Yet another prehistoric animal that you wouldn't want to pronounce with a mouthful of crackers, Phthinosuchus (fffTHINE-oh-SOO-kuss) shares the same double-diphthong spelling as the marine reptile Ophthalmosaurus, with the added burden of being much less well known. This mysterious therapsid, or "mammal-like reptile," of the late Permian period is represented in the fossil record by only a single skull, so, fortunately, it doesn't come up all that often in cocktail-party conversations at paleontology conventions.

07of 10



Noeliria123/Wiki Prehistorico

If you take it slow and phonetically, Propliopithecus (PRO-ply-oh-pih-THECK-uss) is fairly easy to spell and pronounce. The trouble comes when you try to name-check this prehistoric primate two or three times in the same sentence, at which point you may wonder why the people around you are starting to giggle. (For the record, the middle Oligocene Propliopithecus was named with reference to the much later, and slightly easier to pronounce, Pliopithecus, and it may yet revert to the genus name Aegyptopithecus if the fossil evidence so dictates).

08of 10



Nobu Tamura

The American paleontologist Othniel C. Marsh probably thought he was being erudite and classical-minded when he named this dinosaur Theiophytalia (THEE-oh-fie-TAL-ya), Greek for "garden of the gods." All he accomplished, though, was to relegate this otherwise plain-vanilla ornithopod to the dustbins of paleontological history; not many papers have been written about Theiophytalia, possibly because nobody wants to exhaust the resources of their online spell-checking software (or have to pronounce this name during a live presentation).

09of 10


Fossil of Thililua longicollis -- NAtional Museum of Nature and Science, Tokyo Japan.

Momotarou2012/Wikimedia Commons

The marine reptile Thililua (thi-lih-LOO-ah) packs a lot of syllables into its modest frame, and all those similar-looking i's and l's don't aid much in comprehension, either. Still, when you say it out loud, this is one of the most euphoniously named of all prehistoric creatures (another candidate would be a runner-up for this list, the sauropod dinosaur Suuwassea). Rather than being assembled from Greek roots, Thililua was named after an ancient deity of the northern African Berbers, on whose territory the remains of this plesiosaur (a type of marine reptile) were discovered.

10of 10


Fossil remains of Xiongguanlong baimoensis (Dinosauria, Theropoda, Coelurosauria, Tyrannosauroidea).

Conty/Wikimedia Commons

People don't only have a hard time pronouncing convoluted Greek genus names; they suffer the same failing when it comes to Chinese ones as well, especially since there are no hard and fast rules for Chinese-to-English phonetic transcription. Xiongguanlong (zhong-gwan-LONG) can be a difficult name for westerners to tackle, which is a shame since this early Cretaceous tyrannosaur is notable for its coat of feathers. The implication is that all tyrannosaurs--even the fearsome (and much easier to pronounce) Tyrannosaurus Rex--sported feathers at some stage of their life cycles.


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