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Hi all, I have some teeth I'd like some input on. Sorry for the photos, working on improving my current photo setup. First, these teeth from the Demopolis formation of Mississippi (Late Campanian). I'm guessing Serratolamna for some of them but they are a bit different than the typical ones from here. They're quite variable teeth. Tooth 1: Tooth 2: Tooth 3: Tooth 4: These teeth are from the Moodys Branch Formation of Hinds County, Mississippi (Eocene, Bartonian). Tooth 5: Hypotodus verticalis? Tooth 6: Brachycarcharias lerichei? Tooth 7, 8: Abdounia enniskilleni? Thanks for taking a look. I appreciate any thoughts.

During a recent trip back to W.M Browning Cretaceous Fossil Park in Northern Mississippi (Demopolis Formation, Late Campanian) I collected another mosasaur tooth. While incomplete the condition is still very nice. I am aware of the difficulties in identifying isolated mosasaur teeth but have been attempting it nevertheless. If nothing else I've learned more along the way. Two questions for this tooth. The first is the general question if anyone has an idea about the identification. The second pertains to what qualifies as serrations on mosasaur teeth. There are "crenulations" present on this tooth as I would call them but do these qualify as serrations? Among the mosasaurs reported from the Demopolis (Clidastes propython, Halisaurus sp., Mosasaurus conodon, Mosasaurus cf. missouriensis, Platecarpus cf. somenensis, Plioplatecarpus sp., and Tylosaurus sp.) serrations are a characteristic that reportedly separates the majority of them. However, the lack of all facets on the tooth is somewhat unusual in conjunction with the serrations. Am I exaggerating these crenulations as serrations? I posted this tooth once before but thought I'd post it again since it it is from the same site as the new one. I have some reason to believe it may be Mosasaurus missouriensis based on the general shape, number of facets, and cross section, but I've also had difficulty finding reference material for M. missouriensis. Any thoughts? Does anyone have reference photos or material for M. missouriensis?

I have been too busy to get out fossil hunting when I want but there are a few recent times I've been able to get out. I wanted to try and post a small trip report about them. On October 31 I had the opportunity to visit the W.M. Browning Cretaceous Fossil Park in Prentiss County, Mississippi. Most people from the area are probably familiar with this old site but I'm a new resident to this part of the South so I wanted to give it a try. It's Late Campanian Demopolis Formation. It was a little cold and rainy but warm enough for someone used to North Dakota. Apparently these large concretions erode out of a higher formation. First tooth I found wasn't even in the creek but on the bank where I set my sieves. A good sign. A little tributary carving through the bedrock made for relaxing sounds. A little mosasaur tooth. Washing and drying the teeth back home. "Junk" teeth I set aside to use for biology outreach programs. S Some more pics of the mosasaur tooth. A nice Hybodus cephalic clasper. A chunk of cartilage and some verts. A blunted Ischyrizha rostral spine. Keeper fossils. A couple Baculites asper pieces and some Cadulus sp. didn't get in close pictures. I'm always a sucker for lightning and cool color variations in teeth. Serratolamna serrata teeth were the second most common. Squalicorax kaupi Squalicorax pristodontus Hybodus sp. and Pseudohypolophus. Most were missing tips but the Enchodus were a good average size. Xiphactinus teeth were just tips. Some bigger Scapanorhynchys were also present. Baculites asper and Cadulus sp. Anomia argentia The small Gryphaeostrea vomer. Exogyra ponderosa and Pycnodonte convexa (not pictured) were also a common find. Aside from the common material there were some nice rarer specimens and stuff new to my collection. Overall it was a very good trip.

I’ve been working on getting all of our shark teeth properly identified so I went back to a few teeth from the Demopolis Formation. These are from the Frankstown location in Mississippi. The first one up is right around 1” and the little cusps are what initially confused me. Is this a Cretoxyrhina perhaps? I found some images of Cretoxyrhina with cusps that looked similar.

We got a lot of 20 shark teeth from the Demopolis Formation, Frankstown location I believe. I basically separated them by those I think are Goblin teeth and those that I think are not lol Pic 1 I believe these are Scapanorhynchus teeth. Pic 2 and 3. My best guess on this one is Paranomotodon. I am very unsure of that ID.