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A Couple of Shark Teeth. Cretodus houghtonorum and Turonian Galeorhinus?
EPIKLULSXDDDDD posted a topic in Fossil ID
Hey everyone, Just a quick ID post for help in pinning down what exactly these couple of teeth are. Up first is a broken crown to a tooth I found while processing South Bosque material from Central TX for a pet project of mine. It's Turonian in age and looks similar to some small Carchariniformes teeth I've found at the Whiskey Bridge. Note that when I found this tooth, I had not yet visited the Whiskey Bridge, so I am certain this is not a product of cross contamination. Anyways, it's unlike the other specimens I have from the South Bosque and I am struggling to find a genus that -
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From the album: Austin Chalk
Ptychotrygon triangularis, DFW Coniacian, Cretaceous Feb, 2023 -
Prize Catch at the Texas Fish Bed Conglomerate
EPIKLULSXDDDDD posted a topic in Fossil Hunting Trips
The weather's finally warming up here in DFW, and with that, it's time to move on from the comforts of dry land and return to the ways of creek stomping. These past few months, I've been mostly hanging around cuts and construction sites within the Washita Group, and to be honest, I've gotten a little sick of it. During that period, I steadily accrued a sizable list of potential Eagle Ford and Atco locations within the metroplex, and I was itching for the opportunity to finally go and check them out. Yesterday, I circled a few spots on the map and hit the road. Well, the first coupl- 13 replies
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Acrotemnus streckeri Prearticular Tooth, Atco
EPIKLULSXDDDDD posted a gallery image in Members Gallery
From the album: Austin Chalk
Acrotemnus streckeri Prearticular Tooth, DFW Coniacian, Cretaceous Feb, 2023 Some of the largest pycnodont fish to exist. Grew up to at least 1 - 1.3 meters in length. -
From the album: Austin Chalk
Squalicorax falcatus, DFW Coniacian, Cretaceous Feb, 2023 The biggest squali in my collection so far!- 1 comment
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From the album: Austin Chalk
Ptychodus atcoensis, Travis Co. Coniacian, Cretaceous Nov, 2021 Can be identified by the characteristic chevron ridge pattern. Actually my first ever ptychodus. Took me a long time to figure out what it was since atcoensis is a rarer species. As a beginner, it turned me off of pinning down ptychodus species since I worried they might all be as difficult! -
I have been hunting the Basal Atco member of the Austin group in Central Texas for about 7 years. Others say that it is the uppermost part of the Eagle Ford. I don't doubt that it is some type of erosional zone involving the two. I have found hundreds of fossils in it. Most of them are beautiful reddish brown color. Most of them have been damaged somewhat by paleo-erosion before they were left in their final state. Many Basal Atco fossils are very interesting to me, because I can't find them anywhere else. My first area to hunt back in 2015 was a lot of fun. An exposed bluff where
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Hello all! I got some fun Post Oak Creek Matrix and am finding all kinds of odd things!! I am not too familiar with the stuff that comes out of POC aside from the shark teeth and crabby stuff (found a couple of nice claws!) so these things have me wondering what they are! Any help is appreciated! 1.First is this little thing: 4 mm 2. Then this weird thing 6 mm (the backside makes me think denticle but the front.....I don't know) 3. Have found quite a few of these - .I think they are some kind of dermal plates? All are aprox 3 mm
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From the album: Fauna and Flora of the Austin Group in Texas
This Tridenticeras peramplum specimen is 2.9 cm in height, and 1.9 cm in diameter. It shows the typical three rows of tubercles on each oblique rib, except on the most mature, bottom whorl. What I can tell from my references is that this is because only the phragmocone has tubercles, and thus the bottom whorl is the living chamber. -
From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed. -
From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed. -
From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed. -
From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed. -
From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. The specimen is quite crushed. -
From the album: Fauna and Flora of the Austin Group in Texas
This specimen is the largest of its genus in my collection, and the largest known to me in any collection. It measures about 7 cm in height, and 4.3 cm in diameter. It retains its tubercles in the most mature whorl sections that are preserved well enough to tell. -
Found in Atco formation in Texas, Coniacian age. Looking in my Welton Farish book and I can’t find anything similar. Maybe spines of some sort? Kind of looks like teeth and kind of not. Lost on this one. Scale is in mm.
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A few weeks ago my mother, Stella (dog), and I went to a old-reliable heteromorph site in the Atco. After I dragged all my equipment to the part of the site that I was going to work, she went walking with Stella to look at some of the check-dams full of brought in Edwards limestone, chicken wire bags full of the brought in matrix put in the ditches for sediment control. In 2017 while we were at the same Atco site she was looking at a dumped pile of the Edwards and found a rare cidarid (see thread here) that compares well with Temnocidaris (Stereocidaris) hudspethensis. The sight of seeing that
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My wife and I found five Ptychodus latissimus from the same small pocket in the Atco Member basal conglomerate in the last seven months here in Travis County, Texas USA. I am pretty proud of these finds given the rarity of the teeth.
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Aug. & Sept. 2017 Basal Atco Conglomerate Texas Fossil Hunt
LSCHNELLE posted a topic in Fossil Hunting Trips
Got out for a brief 30 minute hunt in September at my favorite Basal Atco outcrop in Travis County for Ptychodus. I found a couple of rare teeth - P. latissimus! Please see pics. The largest is 26 mm tooth width (TW)) with 13 mm tooth height and 6 mm crown height. The smaller fragmented tooth is >16 mm TW. Also, at another location in August, I found a couple of nice teeth: a 23 mm TW P. mammilaris and a 16 mm TW P. mortoni. Both had complete roots for a change. Probably 90% of Atco locations around here have no or very few macro fossils except oyster/clam fragme- 7 replies
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Found this chunk of a bone with matrix attached yesterday. This was lying in the creek next to Eagle Ford/Atco Formation. About 6 x 2 inches. First thought was Mosasaur jaw bone but it also looks fishy. Any thoughts? Thanks.. Far north central Texas upper cretaceous 85-92 mya ...
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From the tip of the root ( seems it may be longer, going further in the rock ) to the tip of the crown is a little over 2 1/4 inches. Dallas County, Atco Formation What say the experts?
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Found this shark tooth in the Atco Formation, what's the species?
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Martin Marietta quarry, Midlothian, Texas - 11-14-15. (formerly TXI quarry)
DinoMike posted a topic in Fossil Hunting Trips
My finds so far from the Dallas Paleo Society field trip to the Martin Marietta quarry. ( I still have a lot of matrix to break down.) IDs are based on my comparing the teeth to the best of my ability with Welton & Farish's book on fossil sharks & rays of Cretaceous Texas. A shark tooth peeking out of the matrix. I managed to fumble-finger while trying to extract it in the field, and lost the side cusp. An overview of the teeth. Top row, L to R: Unknown, Cretodus, Scapanorynchus, unknown, Cretolamna. Bottow row, L to R: Carcharias? symphyseal tooth, broken Scapanorynchus crow -
Phosphate object from Martin Marietta (formerly TXI) Quarry, Texas
DinoMike posted a topic in Fossil ID
I found this object partially visible in a chunk of matrix from the Martin Marietta quarry near Midlothian, Texas. (Formerly the TXI quarry.) The site is listed as being basal Atco contact between the Eagle Ford shale & the Austin Chalk. The rock I found this in was Eagle Ford shale. At first I thought it might be a tooth, but on-site tentative ID was possibly brachiopod, but as the ends were buried in matrix, no one could be sure. I do note a "ridge" down one side that LOOKS almost like the worn serrated edge of a tooth, but the broken end of the piece doesn't look like tooth structure. -
Found this odd claw-like bit today while sorting through gravel from Post Oak Creek. Any ideas as to what this might be? Scale is in mm. Dark photo just to show scale. Both sides of the object. The best shot I could get of the "proximal" end of the thing.
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