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Symphyseal/Parasymphyseal Otodus obliquus Teeth from Morocco
MarcoSr posted a topic in Member Collections
I rarely buy shark teeth, but I saw a lot (see below picture) of small shark teeth from Morocco for sale on FB. I could see a good number of Otodus obliquus symphyseal teeth in the pictures of the lot, and one tooth that looked like an Otodus obliquus lower parasymphyseal tooth. Lower Otodus obliquus parasymphyseal teeth are much rarer than the symphyseal teeth. Per a personal conversation with Lutz Andres, based upon his research Otodus obliquus symphyseal teeth are probably 10 times more common than the lower parasymphyseal teeth. The opposite is true for Parotodus. I bought the lot and just received the teeth. I sent pictures to Lutz of a good number of the teeth, and we agreed that there were 16 symphyseal teeth and one parasymphyseal tooth in the lot. It can be very difficult to differentiate Moroccan Otodus from Parotodus teeth, and only large size can confidently rule out Parotodus teeth. However, in the Moroccan Khouribga faunas, Otodus obliquus are much more common than Parotodus. Group picture of the lot of teeth: Two symphyseal teeth: Symphyseal Otodus obliquus tooth, Khouribga, Morocco 21 mm SH Symphyseal Otodus obliquus or Parotodus tooth, Khouribga, Morocco 10 mm SH Parasymphyseal tooth: Parasymphyseal Otodus obliquus or Parotodus tooth, Khouribga, Morocco13 mm SH Marco Sr.- 2 replies
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From the album: Fossil Collection: DC Area and Beyond
Otodus obliquus Unknown location, Morocco Unknown Eocene-
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From the album: Fossil Collection: DC Area and Beyond
Otodus obliquus Nanjemoy WMA (Purse), MD Aquia Formation Paleocene-
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From the album: Aquia Formation
© bthemoose
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From the album: Aquia Formation
© bthemoose
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From the album: Aquia Formation
© bthemoose
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From the album: Aquia Formation
© bthemoose
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From the album: Aquia Formation
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From the album: Aquia Formation
A big chunky tooth that measures 48.6 mm on the slant and is the largest Otodus I've found© bthemoose
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From the album: Aquia Formation
Extreme posterior tooth and the smallest Otodus I've found© bthemoose
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In sorting through some of my previously unidentified Maryland, USA, shark teeth from the Aquia Formation (Paleocene), I found the small tooth below, which looks like it may be an extreme posterior tooth from an Otodus obliquus shark. It's missing a cusplet, but the shape of the remaining cusplet, cusp, and root all remind me of Otodus or possibly Cretalamna sp., which is also present in the formation. If this is an Otodus, it's definitely the smallest one I've found. @MarcoSr and others, what do you think? Here are several views: And here it is next to my largest Otodus (measuring 48.6 mm on the slant) from the same location.
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I found this perfect little tooth today along the Potomac River in Maryland (Paleocene, Aquia Formation), which I think may be an Otodus obliquus parasymphyseal. The root isn't as oversized as megatooth shark parasymphyseals I've seen posted elsewhere on the forum, but it sure looks like an Otodus, is laterally compressed, and is quite tiny compared to other Otodus I've found. @MarcoSr, @siteseer, @Al Dente, and others, what do you think? This tooth bears similarities to another I found from this location several weeks ago (tooth on the right below).
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I made it out to the Potomac yesterday in Maryland and finally found a 2" (almost) Otodus obliquus tooth! IMG_5728.mp4 It's worn and missing both cusplets unfortunately (have to have a reason to keep looking, right?), but this has been near the top of my Maryland bucket list fossils. It's tad less than 2" (1.91"/48.6 mm), but also very wide (1.38"/35.1 mm) with a nice chunky root. I'll round up. Here it is next to my previous largest Otodus personal find (1.59"/40.4 mm), from February. The new one is four times as massive--20g compared to 5g.
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I purchased a large (3.35"), partially exposed Moroccan Otodus obliquus tooth in matrix a few months ago with the intent of prepping it out and, hopefully, revealing a complete tooth. Having never prepped a fossil before, I consulted some TFF threads for suggestions on tools, before ultimately settling on a pocket scriber. I neglected to take a photo of the original fossil before I did any prep, but here's one from the seller: When the tooth arrived, I scraped a small amount of the matrix away, but I didn't get all that far before setting the tooth aside on my desk. And there it sat for the next 3.5 months. I finally picked up the project again yesterday, with the goal of finishing it off. Estimating the extent of the buried tooth, I first worked to carve out a buffer area around the fossil. I then progressively lowered the base of the matrix with the scriber. (The background is a pizza box that I was using as my work area on the porch.) I experimented a couple of times with wetting the matrix where I was scraping. This made the matrix a tad softer and easier to scrape away, but also resulted in mud that made it more difficult to see what I was doing. Ultimately, it was easier to work with the piece dry so that I could blow away the dust as I went. As I slowly removed more matrix, I finally got a glimpse of the other cusplet. With further prep, the cusplet fully came into view--present and intact. After exposing the cusplet, I continued to expose the rest of the root. To complete the prep, I ran the side of the scriber back and forth along the newly exposed matrix to smooth it out. This worked pretty well in terms of the finish, although applying pressure in this way resulted in the scriber itself bending a bit out of shape. Luckily, it's an inexpensive tool. Below is the final prepped tooth. It is ever so slightly longer now (3.39") than what I was able to measure when the root was only partially exposed. Here's the full piece zoomed out: In clearing matrix from the root, I was a bit too hasty at times, resulting in a few small nicks or scratches, but overall, I'm quite pleased with how this turned out. Thanks for looking!
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From the album: Sharks
A rare symphyseal from Otodus obliquus. ~ 2.5 cm max. slant height.-
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From the album: Sharks
Otodus obliquus Ouled Abdoun Basin, Morocco This species is a candidate for an evolutionary ancestor to the megalodon in the Eocene.-
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I made a trip out to Douglas Point today and had one of those incredible fossil days that just makes you want to head out over and over again. There were two cars in the lot already when I arrived early this morning but their occupants must have been up to something else because I never saw them and I had the beach all to myself for most of the day. It was a chilly but beautiful morning on the banks of the Potomac. There's just no better sight at Douglas Point than a nice Otodus obliquus tooth waiting for you in the sand. And that wasn't the only one -- as it says in the thread title, today was an Otodus kind of day. #3 #4 #5 Yep, still going -- #6, which was in the best shape: And finally, lucky #7, which I found on somewhat higher and drier ground: I didn't only find Otodus today. There were also quite a few nice and sharp sand tigers. I often find large Striatolamia striata roots with broken crowns. But this one was complete! It doesn't hit the magical 2-inch mark, but at 1.7 inches, it is my largest sand tiger find to date. You can't tell in the photo, but the blade is sharp and the tooth is in quite good condition. I found another tooth that at 1.5 inches is also quite large, though this one's more river worn. Beyond shark teeth, I found a nice ray plate. There were also beautiful butterflies. All in all, it was a rather splendid day!
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lower symphyseal Otodus obliquus tooth from the Eocene of Virginia
MarcoSr posted a topic in Fossil Hunting Trips
I just found this 17mm tooth today (see the below pictures) in matrix that I collected from the Eocene, Nanjemoy Formation, of Virginia awhile back. I thought that the tooth was an Otodus obliquus symphyseal tooth and sent a PM to Lutz Andres to get his opinion of the tooth. He responded back: “Hi, it's a lower symphyseal Otodus or Parotodus, and 17 mm is a bit large for Parotodus.” Because of the 17mm size and the fact that Parotodus is not reported from this Formation, I’m going with the Otodus ID. I have a number of Otodus obliquus symphyseals from Morocco but this is the first one that I have personally collected from Virginia. My friend Mike F. has collected two Otodus obliquus symphyseals from the same formation. Marco Sr.- 15 replies
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Otodus obliquus
PrehistoricWonders posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi, I bought this tooth last year and was wondering if anyone knew if it is authentic? It is about two inches long. TIA- 10 replies
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