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Showing results for tags 'cretolamna'.
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From the album: Post Oak Creek
There are two visible shark teeth (that I could see). -
From the album: Post Oak Creek
I found less stuff than last time, but I found a nice centrum and a shard of a mosasaur tooth. A couple teeth grouped with Scapanorynchus may be Serratolamna sp. -
From the album: Post Oak Creek
There are four visible shark teeth in this one shot! Hint: three are right next to each other. -
Back again for more information. These teeth are driving me nuts. I am working on a Coniacian deposit from north central New Mexico, and have gotten around 20,000 fossils from sifting and screen washing ant hills. The vast majority are scapanorhynchids (over 12,000), but there are at least 25 other species represented. These teeth come from a possible barrier island deposit, and the wave action prior to fossilization must have been intense, since almost all the teeth are missing roots. There are around 1500 teeth that look like scapanorhyncus cf. raphiodon, but they have no striations. I was informed by Shawn Hamm that these probably are scapanorhynchids that simply have the striations worn off, something he has seen in the Atco formation in Texas. However, there are around 1500 other teeth that were identified as Cretolamna by Bruce Welton (who personally viewed the collection), but this is disputed by Shawn Hamm, who thinks they are either scapanorhynchus or possibly dallasiella (although I am not aware that this genus has been recorded in New Mexico). Anyone out there want to venture an opinion? I will be put two more photos on another post. Randy
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Hi everyone, I am seeking more information about the spectacular Cretolamna fossil featured in the respective wikipedia article. Aside from being a great fossil it has some interesting features, such as a large second dorsal fin. However, there doesn't seem to be anything else online about this specimen. Does anyone know anything about this - is it in a private collection? Can it actually be referred to Cretolamna?
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Hello all, I purchased two small Moroccan shark teeth and would like to nail down their species. I think they are either Cretolamna appendiculata or small Otodus obliquus teeth. Please let me know what you think.
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I am currently researching Cretalamna for a written article. When searching for images, I came across this peculiar one that I find interesting. No information on this image seems to exist, whoever submitted this photo did not add any sort of description, other than the shark was identified as "Cretolamna sp." However, I feel too curious to not scrutinize this photo. In my attempt to scrutinize the details of this photo, I've concluded a few things. Firstly, it is likely that the fossil came from Lebanon, possibly Cenomanian lagerstattes in Hgula or similar localities, based on the color of the rock and the presence of a possible Diplomystus birdi and generic crustaceans (which are commonly found in the areas. I don't have much of a clue for the fish directly above the shark). Second, it would be difficult to make a solid conclusion as it appears that no teeth are present in the shark fossil (and Cretalamna diagnostics are almost entirely reliant on teeth). Third, some of the parts of the shark fossil, especially the tail portion (marked by a line directly behind the second dorsal fin) may have been artificially reconstructed during prepping. I'm super curious as to what an expert in this forum would say about this fossil.
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From the album: Pisces
Cusp 23mm. Upper. From the phosphate plateau at Kouribga, Morocco Maastrichtian, Late Cretaceous. -
Hi everyone, I found a Cretolamna tooth that has subtle secondary cusplets in the Cretaceous streams of Monmouth county NJ. I was wondering if this is variation within appendiculata or suggestive of biauriculata maroccana. Any thoughts would be appreciated as always. I hope to take some better pictures soon. The tooth in question is on the left with a typical Cretolamna appendiculata on the right for comparison.
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This tooth was found on my most recent trip to Purse State Park. I believe it is a Mackerel Shark tooth, Cretolamna. I think this may be my first truly pathological tooth because it does appear to be deformed. The crown of this genus does not typically slant to one side so much as this one does. Also, the crown is twisted rather than flat, much like the crowns of Physogaleus contortus. The thing that most leads me to believe it is pathological, however, is one of the cusps. The first cusp seems normal, but the other is twisted at a 90 degree angle and seems pressed against the crown. Can I get any confirmation that this tooth is in fact pathological? Also, can I get an ID as far as species goes, or is Cretolamna sp. the best I can get? Thanks in advance!
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Help needed to identify these shark teeth. Responses are appreciated. Thx.
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Good evening, I found these two in a gravel bed along a creek in Travis county, Texas. Definitely the smallest I've found. Any input appreciated, thanks
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A nice lateral tooth.
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So, I have acquired a specimen of every species from cretolamna to C. megalodon. Now I just need to get better representatives, or ones that fit the bill better (posteriors, around 2 inches, and curved to the right). The last specimen is coming in the mail later this month (a auriculatus). I need to find a new otodus, a larger angy, a complete meg, and maybe an aksauticus that curves right. Here’s the set without auriculatus, I’ll update this thread with it once it comes. I’ll have to get working on the GW shark line next, that one will be MUCH harder...
