<p>Most likely plesiosaur. That fluted structure is indicative of marine reptile teeth. My first guess was mosasaur but their are a lot of plesiosaurs from that formation so I would go with that. It is obviously a shed tooth which makes it harder. shark teeth flare out at the base becasue they attach differently than marine reptile teeth, sharks need more surface area for a strong connection.  Hopefully a marine reptile person can give you a tighter identification, I mostly work on dinosaurs. </p>

CC BY-SA 3.0
2016-12-10T14:17:20.130Z
2016-12-10T14:23:06.373Z
2016-12-10T14:23:06.373Z
John
<p><a href="https://i.sstatic.net/RJZW9.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/RJZW9.jpg" alt="enter image description here"></a></p>

<p><strong>Lenght: 10 mm, striated, circular cross-section</strong></p>

<p><strong>Site: Brno-Hády (limestone quarry), Moravia, Czech republic, central Europa</strong></p>

<p><strong>Age: Jurassic, oxford</strong></p>

<p>The site is a good source of fossil shark teeth, but this tooth I am wondering about has absolutely different structure and does not have as strong luster as shark teeth have. </p>

<p>An example of shark tooth fossil from Brno-Hády site:
<a href="https://i.sstatic.net/F2Zqh.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/F2Zqh.jpg" alt="enter image description here"></a>
<a href="https://www.flickr.com/photos/violetplanet/26006990296/in/album-72157665693696130/" rel="nofollow noreferrer">See my shark-tooth photos here</a>. </p>

<fossils><paleontology>
I have found this fossil tooth, could it be pliosaur ? Or maybe theropod?
Petr Hykš
# I have found this fossil tooth, could it be pliosaur ? Or maybe theropod?

(Asked by: username_0 on 2016-12-09)

[![enter image description here](https://i.sstatic.net/RJZW9.jpg)](https://i.sstatic.net/RJZW9.jpg)

**Lenght: 10 mm, striated, circular cross-section**

**Site: Brno-Hády (limestone quarry), Moravia, Czech republic, central Europa**

**Age: Jurassic, oxford**

The site is a good source of fossil shark teeth, but this tooth I am wondering about has absolutely different structure and does not have as strong luster as shark teeth have.

An example of shark tooth fossil from Brno-Hády site:
[![enter image description here](https://i.sstatic.net/F2Zqh.jpg)](https://i.sstatic.net/F2Zqh.jpg)
[See my shark-tooth photos here](https://www.flickr.com/photos/violetplanet/26006990296/in/album-72157665693696130/).

**Tags:** fossils, paleontology


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## 1 answers

### Answer by username_1 on 2016-12-10. Score: 6 | Accepted answer

Most likely plesiosaur. That fluted structure is indicative of marine reptile teeth. My first guess was mosasaur but their are a lot of plesiosaurs from that formation so I would go with that. It is obviously a shed tooth which makes it harder. shark teeth flare out at the base becasue they attach differently than marine reptile teeth, sharks need more surface area for a strong connection. Hopefully a marine reptile person can give you a tighter identification, I mostly work on dinosaurs.


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