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Showing results for tags 'squalicorax'.
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From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax lindstromi (Davis 1890). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax aff. lindstromi (Davis 1890). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax aff. lindstromi (Davis 1890). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax sp. (Whitley 1939). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax sp. (Whitley 1939). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax sp. (Whitley 1939). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax curvatus (Williston 1900). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax hartwelli (Cope 1872). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax curvatus (Williston 1900). Slant length indicated by longest side. -
From the album: Texas Cretaceous Shark teeth and Other Marine Fauna
Squalicorax curvatus (Williston 1900). Slant length indicated by longest side. -
From the album: Maastrichtian Shark Teeth, Volgograd Oblast, Russia
Squalicorax pristodontus (Agassiz 1843). Slant length indicated by longest side. -
From the album: Maastrichtian Shark Teeth, Volgograd Oblast, Russia
Squalicorax pristodontus (Agassiz 1843). Slant length indicated by longest side. -
This was found by myself in Ellis County, TX. I believe the formation was the Atco (or at least the Austin Chalk & Eagle Ford, if I’m not mistaken). The scale is in centimeters. I can post other images if needed; these were the two I just happen to have accessible at the moment. A couple of people who saw it in person said it was Squalicorax. I have some Squalicorax that have the well-known distinctive shape, but I also know that Squalis have teeth that don’t have that angled look. I’d never seen a non-angled Squali tooth before. However, when I posted it online in a Facebook group, an experienced shark tooth collector was absolutely adamant that this is Cretoxyrhina. So now I am unsure. I am more inclined to say it is Cretoxyrhina, but I am far less familiar with vertebrates than inverts. Thank you for any help!
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- cretaceous
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From the album: Post Oak Creek
Typical crow shark teeth from POC. -
Are all these three Moroccan shark teeth all Squalicorax pristodontus? Is there any other Squalicorax Sp. found there?
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Hi everyone. Here i will show two genus of extinct Sharks such as 1.Squalicorax and 2.Cretoxyrhina. If someone is interested,let know Thanks for your time, Darko
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From the album: Sharks
Two nice S. kaupi teeth.-
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I found this tiny Squalicorax tooth yesterday at Ramanessin Brook (Monmouth County, NJ Cretaceous). It's interesting to me because it appears to have a mesial heel (notch) that I've seen on other species of the shark but doesn't have a nutrient groove (which I believe disqualifies it from being Pseudocorax) so I'm trying to figure out what it is. Also, I don't believe Squalicorax bassanii is known from this location but I could be wrong. Thanks! -Frank
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Our Shark Education Program- Cows, Crows, and Goblins
fossilsonwheels posted a topic in Member Collections
After the Hybodontids, our program starts to transition toward the modern sharks. We introduce lamniform sharks and the cow sharks. We will not be able to spend much time at all on the Cow and Crow Sharks. They only get a brief introduction and a look at the teeth. Squalicorax is an important species for us even though we do not spend a lot of time on it. The students in first few classes we do presentations for will be going home with Squalicorax teeth from Morocco. We would like to spend more time on the Cow sharks eventually but we only have one tooth to show them and we will have to edit content to free up space for them but I will work on that down the road. The primary focus in this section is Scapanorhynchus. The first shark art Carter did was a Goblin and we do give them a lot of time in the presentaton. They look cool and have been around for a long time. We present the kids with a nice assortment of teeth and some cool science. The teeth were important adaptations for catching fish and the snout had the ampullae of Lorenzini for sensing changes in the electro magnetic fields around them. We compare this to the modern hammerhead which we do not cover in the program but gives the kids a sense of how the adaptations of hammerheads work. We also talk about fin structure and being able to tell they were slow swimmers. The extend-o-matic jaw is another adaptation we cover with this species. I am happy with the fossil representations for now though I really want to add more Cow Shark fossils at some point and Anomotodon would also be a good addition. The fossils for the presentation.. Pic 1 Hexanchus andersoni from STH. I know H. andersoni should chronologically fit later but Cow Sharks fit here and this is the only one we have for now. Pic 2- Squalicorax pristodontus from Morocco. This is our largest Squalicorax tooth. The kids will get these teeth to take home so while we do not spend a lot of time on them, the teeth are very important to the program. Pic 3- Scapnorhynchus texanus and Scapanorhynchus puercoensis. Our nice little Goblin Shark display with some of our best teeth. Two of the texanus teeth are over 1.5 inches and the puercoenisis teeth are uncommon I believe and pretty super cool.
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Cretoxyrhina and Squalicorax (Ginsu and Crony) drawing
Macrophyseter posted a topic in Paleo Re-creations
After stuffing my face into tons of scientific articles on Late Cretaceous Lamniformes, I decided that I'd want to draw some sharks. Here's a drawing of the two infamous sharks of the Niobrara Formation Cretoxyrhina mantelli and Squalicorax falcatus as partners-in-crime. I've made the Cretoxyrhina ≈6-7 meters and the Squalicorax ≈2 meters. As 2 meters would be the same size as a very tall 6'6" human, you could imagine the Squalicorax as the tallest ordinary human and see how much bigger Cretoxyrhina is. I've always felt like Squalicorax would commonly accompany predators like Cretoxyrhina to "help" strip bare the latter's kill (Crow sharks are indeed inferred by scientists as opportunistic feeders or scavengers), almost as if Ginsus had them as little cronies. Also, the common name Crow Shark sounds somewhat similar to crony. Now what if we started a new nickname for Squalicorax as a crony? That would be hilarious and maybe realistic. EXTRAS
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I personally own a 1,57" (4cm) Squalicorax tooth from Morocco and was wondering how large they could get. What is the biggest Squalicorax tooth you guys have ever seen or own?
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Mixed Cretaceous shark teeth from Dallas Texas
britishcanuk posted a topic in General Fossil Discussion
I’m very excited by the most recent addition to my shark tooth collection, this chunk of Cretaceous matrix from the Cretaceous deposits around Dallas, Texas. I can see at least 17 squalicorax teeth, 6 Ptychodus teeth and two other unidentified species, plus several other root lobes protruding our, undoubtedly still attached to the blades that are buried within the rock. There are also a few bits of bone scattered throughout. I wonder how so many teeth of so many species could gather and fossilize together in such a way. Side one
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I have a question for you all pertaining to a Squalicorax kaupi tooth that I found while hunting with Frank at Ramanessin brook this past summer. I have hunted in thebrooks a fair number of times over the years and have collected a good amout of Squalis in that time. The tooth in question has a feature that I have not seen on any of the other teeth that I have found. Located on the mesial side of the root lobe there are serrations. I wouldn't really call this a cusp per se. I assume that this could be a feature that could very easily be worn off by the nature of being tumbled in the brooks. I have not seen, heard mention of, or read anything about this feature in the past. So my question is, has anybody else seen this, or could this hold some scientific value?
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Been going to the brooks of NJ for over a year now so once I go through my phone I’ll post some more pics on top of my better finds from there. Today I was fortunate to meet @Trevor and do a little hunting with him. Thanks for showing me some new spots and techniques. Didn't have the best of days but went home with quite a few. Not quite sure what this is. I think it might be a part of a ghost shrimp but could be a concretion. Hopefully @Trevor will post his finds from today in here. All are more than welcome to share experiences and their trips in here also. Thanks for looking - Paul
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I have done some more research on the squalicorax that I posted about a few weeks ago. I ended up examining 886 teeth or fragments thereof. Of these, 79 showed a fossilization process in which the serrations (and sometimes the whole cusp) was covered with a white mineral. 48 were so worn that sometimes the serrations could barely be made out. 254 were too small or fragmented to be of any use (which does not preclude that they were of the same species as the rest). The remaining 632 all had the ornamentation that is so unusual. They can be found only on the labial side of the cusp (forgive my previous posts saying that they were on the lingual side...a stupid mistake on my part), and the majority are on the mesial edge of the cusp, although a smaller percentage have the ornamentationon the distal edge, and even fewer have them on both. . There are three types of ornamentation, the least common being a horizontal band below the top of the cusp. The second type consists of a small circular indentation, and can be found anywhere on the serration. The most common is a vertical triangle, with the apex of the triangle towards the top of the serration. I have no clue as to whether this is due to ontological heterodonty, sexual dimorphism, placement within the jaw, or something else. If anybody could check their S. falcatus examples (the closest that these teeth resemble), or any other Coniacian squalicorax, and see if this ornamentation is found beyond the fauna I am working on. I have corresponded with Mike Everhart (Oceans of Kansas), and this is new to him. All help will be greatly appreciated! I will post two pictures here, then two more immediately after. Thanks again! Randy
