What Dinosaur Has 500 Teeth? Meet Nigersaurus, the Real Answer

If you’ve spent any time on social media lately, you’ve likely encountered the meme: a dinosaur with 500 teeth and a name that invites mispronunciation. Behind the joke is a genuine scientific marvel — Nigersaurus taqueti, a 30-foot-long sauropod with a jaw full of slender teeth designed for mowing low-lying plants.

Number of teeth: Up to 500 ·
Replacement rate: Every 14 days ·
Discovery year: 1997 ·
Diet: Herbivore

The table below summarizes key facts about Nigersaurus taqueti.

Is Nigersaurus a real dinosaur?

Nigersaurus taqueti is a very real dinosaur species formally described in 1999 (Paul Sereno – University of Chicago). It belongs to the family Rebbachisauridae, a group of diplodocoid sauropods known for their narrow muzzles and low-browsing lifestyle. The first fossils were collected in the 1970s by French paleontologists in the Sahara Desert of Niger, but more complete remains were excavated by a University of Chicago expedition led by Paul Sereno in 1997.

What is Nigersaurus?

• It is a 30-foot-long (9 meters) sauropod that weighed about 4 tons (Paul Sereno – University of Chicago).
• Its skull was lightly built and featured a wide, straight-edged muzzle filled with more than 500 replaceable teeth.
• Uniquely among tetrapods, the tooth rows were rotated transversely, meaning all the teeth were at the front of the jaw.

How was Nigersaurus discovered?

• Fossils were first found in 1976 by French teams in the Gadoufaoua region of Niger.
• In 1997, Paul Sereno’s expedition located a bonebed with multiple individuals, including a partial skull (Paul Sereno – University of Chicago).
• The species was formally named in 1999 based on these remains.

The implication: Nigersaurus is no hoax — it’s a well-documented dinosaur that challenges our assumptions about how sauropods fed.

Why was it named Nigersaurus?

The name Nigersaurus combines “Niger” (the country where the fossils were found) and the Greek “sauros” (lizard). The full binomial Nigersaurus taqueti honors Philippe Taquet, the French paleontologist who first described the site.

What does Nigersaurus mean?

• Literal meaning: “Niger lizard” or “Niger reptile”.
• The name was chosen by Paul Sereno and his team in 1999.

Who named it?

• Paul Sereno, Jeffrey Wilson, and colleagues formally described and named the species in the journal Journal of Vertebrate Paleontology.

The pattern: Unlike many dinosaur names that describe a feature, this one simply acknowledges its origin — but it later became the root of internet confusion.

What dinosaur has 10000000000 teeth?

No dinosaur has ever had 10 billion teeth. The question is a viral meme that exaggerates the real answer — Nigersaurus, which had “only” about 500 teeth. The meme originated from a 2019 Facebook post that paired a misleading screenshot with the phrase “What dinosaur has 10 billion teeth?” to troll readers.

Is there a dinosaur with billions of teeth?

• Absolutely not. The highest known tooth count among dinosaurs is roughly 500, owned by Nigersaurus.
• Even the hadrosaurs with dental batteries had at most a few hundred teeth in use at once.

Why do people ask about 10 billion teeth?

• The number is purely for humorous shock value, playing on the difficulty of pronouncing “Nigersaurus”.
• Search engines and Q&A sites now routinely surface the real answer alongside the myth.

Why this matters: The meme has ironically made millions of people aware of a real scientific wonder — a dinosaur with the fastest tooth replacement known to science.

What dinosaur has 0 teeth fossils?

Many theropod dinosaurs were toothless. Oviraptor philoceratops, for example, had a beak with no teeth, as confirmed by specimens at the American Museum of Natural History.

Which dinosaurs were toothless?

• Oviraptor and its relatives (oviraptorids) had beaks and ate eggs or plants.
• Ornithomimids (ostrich dinosaurs) also lacked teeth and likely fed on vegetation or small prey.
• Early ceratopsians like Psittacosaurus had beaks but still had teeth in the back.

Why would a dinosaur have no teeth?

• Loss of teeth is an adaptation for a specialized diet, such as egg-eating or plant-processing with a beak.
• It reduces weight and may improve feeding efficiency for certain food types.

The trade-off: Toothless dinosaurs exchanged the ability to chew for a lightweight, precision beak — a different evolutionary path from the high-tooth-count strategy of Nigersaurus.

How do you pronounce Nigersaurus?

The correct pronunciation is NYE-jer-SAW-rus, with the stress on the second syllable. The first syllable sounds like the word “nigh,” not the slur.

Common mispronunciations

• Some people mistakenly pronounce the first syllable with a hard ‘g’ (like “Nig-er”), which can sound like a racial slur. The correct ‘g’ is soft, as in “Niger” the country.
• The confusion has fueled the internet meme, but paleontologists emphasize separating the animal’s name from any offensive homophone.

Phonetic spelling

• IPA: /naɪˈdʒɛərˌsɔːrəs/
• Breakdown: NYE (rhymes with “sky”) + jer (as in “jerk”) + SAW (as in “saw”) + rus (as in “rust”).

The catch: Once you know how to say it, the meme loses its shock value — but the dinosaur becomes even more fascinating.

Timeline: From fossil to meme

• 1976 – First fossils discovered by French paleontologists in Niger.
• 1997 – Paul Sereno expedition re-discovers and excavates more complete remains.
• 1999 – Nigersaurus taqueti formally described by Sereno et al.
• 2007 – CT scanning reveals up to 8 replacement teeth per socket.
• 2019 – Internet meme “what dinosaur has 500 teeth” goes viral.

The pattern: Each step — from field discovery to digital sensation — shows how science and pop culture can collide.

Specifications of Nigersaurus taqueti

Seven key measurements, one pattern: every dimension supports a low-browsing, high-turnover feeding system.

What this means: Every dimension of Nigersaurus supports its unique low-browsing, high-turnover feeding strategy.

Confirmed facts vs. open questions

The contrast highlights the solid evidence behind the 500-tooth claim.

“Nigersaurus is one of the weirdest dinosaurs I’ve ever seen — its skull is almost comical, with a mouth full of tiny teeth like a hedge trimmer.”

— Paul Sereno, paleontologist (University of Chicago)

“Think of Nigersaurus as a mesozoic lawnmower: it just grazed low plants all day and replaced its teeth faster than any other dinosaur.”

— National Geographic, 2007

For the meme-spreading public, the choice is clear: keep laughing at the fake 10-billion-teeth dinosaur, or pause to appreciate the real creature — a gentle, toothy giant whose 14-day replacement cycle is unmatched in the fossil record.

Frequently asked questions