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Showing results for tags 'microfossils'.
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From the album: Aguja Formation
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From the album: Aguja Formation
Shed tooth from a very young "duckbill" dinosaur from West TX. Height: 4 mm. -
From the album: Aguja Formation
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From the album: Aguja Formation
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From the album: Aguja Formation
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From the album: Permian
Some more complete Orthacanthus teeth, each maybe about 1/4" in size-
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- early permian
- microfossil
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From the album: Permian
One of the most common fossils from the Permian (this locality in particular). Unfortunately, they are almost always broken. Of the hundreds of teeth I have, perhaps only a few larger than a couple of mm are mostly complete. -
From the album: Permian
A handful of the more interesting (of very few) fossils I found in unprocessed matrix from the Archer City fm. here in TX. -
From the album: Permian
Eryops teeth are conical (this one bears no carinae, though don't know if that's true for the whole dentition), and often have basal creases. -
From the album: Permian
It's remarkable how much of an ecosystem's diversity can be captured in a space smaller than a matchbox. In this case are the likes of Dimetrodon, Eryops, Archeria, Seymouria et al.-
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- archeria
- dimetrodon
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From the album: Permian
Actinopterygian (ray-finned) fish teeth from the Early Permian of OK (Wellington Fm.). -
From the album: Permian
An amphibian tooth from the Early Permian of OK (Wellington Fm.). They can be differentiated from similar Actinopterygian teeth by the lack of a conical acrodin cap (translucent tip), no "S" curvature, and basal creases which terminate well before the apex. The exact ID is uncertain, but it could be something like Trimerorhachis. -
From the album: Permian
Rhipidistian (lungfish) scales from the Early Permian (Wellington Fm., Waurika, OK). They can be identified by a "honey comb" structure on one side, the other is largely featureless. -
From the album: Permian
These sand grains were deposited by a river in the Early Permian of what would be North Texas. Iron oxides (e.g. hematite) color these sediments red (they weren't originally). -
From the album: Permian
Sandstone collected from the Arroyo formation (Clear Form Group) of North Texas. The color transition represents a transition between a river deposit (red) and a floodplain deposit (white). See "Geologic Guide of Baylor County, Texas" -
From the album: Permian
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- actinopterygian
- fish scale
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From the album: Permian
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From the album: Permian
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From the album: Permian
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From the album: Permian
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From the album: Hell Creek / Lance Formations
Pectinodon (meaning "comb-tooth") is a tooth taxon, since no remains attributable to the genus beyond teeth have been found. Pectinodon seems to be a rare member of the Hell Creek fauna, with their teeth being fairly uncommon (though being so small, I'd guess that few people actively search for them). It was a small Troodontid theropod, with teeth that couldn't handle stresses as well as their Dromaeosaurid and Tyrannosaurid cousins (Torices et al. (2018)). This coupled with their small size suggest that Pectinodon was a small/soft prey specialist, preferring the rodent-sized mammals of the time, lizards, insects, etc. Some researchers have proposed omnivory as a possibility for Troodontids (cf. Holtz et al. (1998)). Troodontids famously are regarded as among the most intelligent dinosaurs for their large brain size / body size ratio. This notion serves as fodder for speculation that had the dinosaurs not gone extinct, Troodontids (Pectinodon being (one of?) the last) would have continued to grow in intelligence and develop sentience and civilizations. Troodontid teeth like Pectinodon can be easily identified by their small size, exaggerated, triangular, apically oriented posterior serrations.-
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- cretaceous
- dinosaur
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Post Oak Creek
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From the album: Triassic
Revueltosaurus was a Pseudosuchian, on the branch of the Archosaurs more closely related to the Crocodilians than the Dinosaurs. Despite the serrated teeth, it is thought to have been herbivorous.-
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- archosaur
- bull canyon
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