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I think it’s a great white maybe? it’s labeled inside 1969 w some writing in another language.

The genus Centrophorus sp. represents a very interesting group of sharks within the Centrophoridae (Squaliformes), which can be found up to about 3000m below the sea surface. The largest representatives of this group reach a body length of 170cm. Not only because the sharks of this group are among my favorite sharks, but also because fossil finds of this species are extremely rare, I decided to write about this topic and compare fossil and recent Centrophorus species with each other, as well as collect the known information about them. The modern genus Centrophorus has been repeatedly revised, rewritten, rearranged, species synonymized and added again in recent years, which makes it difficult to keep an overview. According to my count, the genus currently includes a maximum of 17 described species and is distributed in all deep-sea regions worldwide. The 17 known modern Centrophorus species are: C. acus (synonymous with C. granulosus according to White 2013, but still often considered independent), C. atromarginatus, C. granulosus, C. harrissoni, C. isodon, C. lesliei, C. longipinnis, C. lusitanicus (probably a cluster of different species), C. machiquensis (doubtful), C. moluccensis, C. niaukang (synonymous with C. granulosus according to White 2013, but still often considered independent), C. seychellorum, C. squamosus, C. tessellatus , C. uyato, C. westraliensis, C. zeehaani The fossil records are limited to 3 species, Centrophorus granulosus, squamosus and primaevus. They appear from the late Cretaceous (Haumurian) or early Paleocene (Keyes, 1984). It is possible to distinguish different species based on their teeth, but in many cases it is very difficult, especially without locality data and due to the lack of and contradictory information. I would like to show you the teeth of 9 extant Centrophorus species from my collection and the 3 known fossil species. I would particularly like to focus on their teeth, as they are almost the only thing that can be detected as fossils and also what is most likely to get from the recent species. Since my English is unfortunately not good enough to describe the tooth shape perfectly, I will let the pictures do this The tooth formula describes the number of teeth in the upper and lower jaw. I have summarized them myself from the literature for most of the species, since there were often different numbers to be found. Centrophorus squamosus Is one of the largest representatives of this group (up to approx. 170cm) and is distributed worldwide. It can be found down to a depth of 2400m. The fossil record is currently limited to New Zealand (Keyes, 1984). Tooth formula: 30-38 / 24-32 Keyes, 1984 (fossils, found at different localities in New Zealand): Extant teeth/ jaw from my collection (35 / 30; 15x12cm): Centrophorus primaevus Extinct representative of this group (lived in the Late Cretaceous, Santonian). It is a relatively small representative with a body length of approx. 0.5m (previously known). Tooth formula: Unknown The fossils shown are from Lebanon (Kriwet & Klug, 2009): Centrophorus granulosus Also a large representative of this group (up to 170cm). The species is distributed worldwide, but not in the Mediterranean where it is replaced by C. uyato. It occurs to a depth of about 1500m. The fossil records are currently limited to France (Ledoux, 1972). Tooth formula: 36-43 / 28-32 Ledoux, 1972 (fossils from France): Ebert & Dando, 2021: My collection (39 / 30; 9x8cm): However, most fossil Centrophorus teeth found in publications are not assigned to a specific species, but only as Centrophorus sp.. Here are a few sample images from various publications: Mannering & Hiller, 2008 / Schutter & Wijnker, 2012: Below I would like to post pictures of the remaining extant Centrophorus species. Unfortunately, for some species the information is very scarce and, as I said, often contradictory.

Hey there! I need some help identifying this shark jaw that I received as a gift a few years ago. All I know about it is that it came from Isla Mujeres, Mexico. Its about 23 centimeters in width and about 8 centimeters from the top of the mouth to the bottom, my apologies for how gritty the pictures are, my phone camera is not the best.

To understand and id fossil shark teeth it really helps if you are familiar with extant shark teeth. I’ve been taking more pictures of my extant shark jaws. This post contains pictures of an extant Heterodontus zebra (Zebra Bullhead Shark) taxidermy specimen and an additional jaw. Links to my previous TFF posts on extant shark jaws can be found at the below TFF link. My Extant Shark Jaw Collection Below is a 23 inch long taxidermy specimen. Adult specimens can reach 122 cm in length. Adult body colors can vary but usually range from white to cream with black or dark brown zebra-like narrow vertical saddles and bands. Juveniles have red-brown bands: This shark is a male based upon the claspers shown in the below picture: Pictures of the dorsal fin spines on the first (note this spine is damaged at the tip) and second dorsal fins: The jaw: The placoid scales are more spread out on the dorsal side (back or upper side) and much denser on the ventral side (belly or lower side) of the shark. The shape of the placoid scales varies depending on the body area of the shark. Placoid scales on the head between the shark’s eyes from a dark band and a light area. Placoid scales on the dorsal side of a pectoral fin: Placoid scales from the ventral side near the jaw: Continued in next reply Marco Sr.

Hi everyone! In November I will be doing a presentation for my local club on sharks. The title will be "Sharks: The Living Fossil ". I would like to get my hands on a shark jaw to use for the presentation for a visual aid. I could either do a trade or purchase. Or if there is a kind soul out there who may possibly be willing to loan one to me? I would highly appreciate any and all offers. Thanks in advance Darktooth Dave

Been lucky enough to add a few edestus jaws in my collection recently

Hey, I bought this jaw quite a while ago now. I bought it from eBay and it was titled as just 'Shark Jaw'. I messaged the seller after i bought it and he said he doesn't know what it is but he thinks it could be a Whitecap Reef Shark jaw. I took his word for it and assumed that it what it is. But recently i've been paying more attention to identification of Shark Jaws and I'm having my doubts on whether this is actually a Whitetip reef shark. It measures around 10" wide. What do you think it could be? I've attached a photo of the Jaw itself and two additional photos of the top row of teeth and bottom row of teeth. (obviously the top row is the triangular shaped teeth) Any thoughts on this are greatly welcomed.