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Showing results for tags 'pectinodon'.
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From the album: Hell Creek Formation Microsite
Identifying features of the troodontid, Pectinodon. The illustration is the holotype, adapted from Carpenter 1982, the color image is a specimen in my collection. These are thought to be anterior dentary teeth; medial/posterior positions lack the lingual pitting, and may have fine serrations at the base of the mesial carina. Carpenter, K. (1982). "Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of a new species of theropod". Contributions to Geology, University of Wyoming. 20 (2): 123–134.-
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From the album: Hell Creek / Lance Formations
This rare theropod tooth was found via screen washing matrix from a channel deposit. It's large for the species and from the front of the jaw. All of the denticles are intact - a spectacular specimen. 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.- 1 comment
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Identification Troodontid teeth may be identified by their exaggerated, triangular, apically directed posterior denticles1. Pectinodon bakkeri is the only Troodontid species currently named from Lancian strata; its teeth are on average smaller and more gracile than those of its cousin, Troodon. Comments This is a large anterior dentary tooth, recovered by screening matrix from a channel deposit in central Montana. Pectinodon (meaning "comb-tooth")1 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. It was a small theropod, with teeth that couldn't handle stresses as well as their Dromaeosaurid and Tyrannosaurid relatives2. 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))3. References 1. Carpenter, Kenneth. "Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of en new species of theropod." Contributions to Geology 20.2 (1982): 123-134. 2. Torices A, Wilkinson R, Arbour VM, Ruiz-Omeñaca JI, Currie PJ. "Puncture-and-Pull Biomechanics in the Teeth of Predatory Coelurosaurian Dinosaurs." Curr Biol. 2018 May 7;28(9):1467-1474.e2. 3. Holtz TR Jr, Brinkman DL, Chandler CL. "Denticle morphometrics and a possible omnivorous feeding habit for the theropod dinosaur Troodon." Gaia. 1998; 15: 159–166.
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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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From the album: Hell Creek / Lance Formations
Microfossils are the means by which we can most fully appreciate the diversity of a past ecosystem. From salamanders to Tyrannosaurus, an ancient river captured and preserved dozens of species that lived in Montana 66 million years ago, at the terminus of the time of dinosaurs. In this small collection alone, I count at least 27 species of dinosaur, lizard, crocodile, fish, shark, salamander, turtle, mammal, and mollusk.-
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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. -
Hi y'all, about a year ago I started digital sculpting on my tablet and began with some Devonian "shark" teeth, inspired by ones in my collection (see topic here). Several months later after becoming more familiar with the process, I decided to try my hand at dinosaur skulls. In particular, I wanted to render the juvenile Tyrannosaurid, "Jane" (BMRP 2002.4.1) since regardless of your stance on the species, it's an important and cool fossil. Here I present my amateur first pass. My end goal is to have a 1:1 scale 3D print. And for you Tyranno-nerds, yes it accurately has incisiform premaxillary teeth with a lingual apicobasal ridge. To get the shape of all the teeth right, I referenced a couple in my collection. They were duplicated and squashed around to match the variation in morphology of the dentition. I also uploaded the model for you to interact with; honest critiques are welcome as it's not a final version I feel is ready for full scale printing. Certain aspects of the anatomy, especially the hard-to-see interior portions are probably where most errors lie. In December, I however did print a smaller scale to see how it looked: The nice thing about digital sculpting is that I can copy the entire skull and very readily reshape it into a similar one. The natural choice is to do a young juvenile / baby T. rex. This is as much a hypothesis as it is art. I based it off of the Witmer Lab's more rigorous reconstruction of "Chomper", and a similarly-sized young Tarbosaurus (which was a close cousin of T. rex). I again uploaded the model for your enjoyment / inspection: Next, I decided to wander much farther from Tyrannosaurs and shape it into a Troodontid, Pectinodon bakkeri. Of course Pectinodon is only known from its teeth, so I at least got the shape of those right (again, based off of a fossil in my collection). The rest was inspired by the reconstructions of others, presumably informed by more completely-known Troodontids. And finally, a sneak peak of what I'll be working on, Acheroraptor temertyorum. This time it's from scratch since there are some things I want to do differently. Thanks for reading, hope you enjoyed!
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From the album: Hell Creek / Lance Formations
Even in the final years of the non-avian dinosaurs, the paravians remained diverse, with many species represented in the famed Hell Creek formation.- 1 comment
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- acheroraptor
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Over the past few months I have seriously been doubting the validity of Troodon. For the majority of the time I’ve known about Troodon I thought it was valid, however I’ve started to doubt its validity. The main reason is that it’s only described from one tooth. I thought I’d bring this question here because there’s a lot more people here that know more about paleontology and taxonomy than me. Thanks for any help!
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Identification Troodontid teeth may be identified by their exaggerated, triangular, apically directed posterior denticles1. Pectinodon bakkeri is the only Troodontid species currently named from Lancian strata; its teeth are on average smaller and more gracile than those of its cousin, Troodon. Comments Pectinodon (meaning "comb-tooth")1 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. It was a small theropod, with teeth that couldn't handle stresses as well as their Dromaeosaurid and Tyrannosaurid relatives2. 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))3. References 1. Carpenter, Kenneth. "Baby dinosaurs from the Late Cretaceous Lance and Hell Creek formations and a description of en new species of theropod." Contributions to Geology 20.2 (1982): 123-134. 2. Torices A, Wilkinson R, Arbour VM, Ruiz-Omeñaca JI, Currie PJ. "Puncture-and-Pull Biomechanics in the Teeth of Predatory Coelurosaurian Dinosaurs." Curr Biol. 2018 May 7;28(9):1467-1474.e2. 3. Holtz TR Jr, Brinkman DL, Chandler CL. "Denticle morphometrics and a possible omnivorous feeding habit for the theropod dinosaur Troodon." Gaia. 1998; 15: 159–166.
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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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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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From the album: Lance fm. Microsite Finds
Another shot of the Pectinodon tooth featured earlier in this album, this specimen was found by my dad and is one of two Troodontid teeth in my collection. -
Good afternoon, I found this tooth on a fossil website for a great price and had to get it! Now the part I’m struggling with is wondering whether or not it’s a troodon specimen or pectinodon specimen. The pictures are kind of dark so I can’t really see any mesial serrations. Basic info: The tooth comes from the Hell Creek FM and is 0.12” long. What do you guys think? I’m leaning towards pectinodon.
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Hey everyone, I came across these teeth online; They're being sold as an Acheroraptor teeth, but seemed odd to me and reminded me of some recurved Pectinodon teeth I had seen elsewhere (given their small size, too). [Tooth 1] The tooth was found in Hell Creek deposits in Carter County, Montana. I edited the seller's images together to make some features more visible. Its total height is 5mm; the serration density I measured is around 6/mm; Scale bar is 4mm. [Tooth 2] The tooth was found in Hell Creek deposits in Powder River County, Montana. Its total height [?] is around 4mm; Since there was no exact scale reference I couldn't edit in a scale bar. Thanks for any help with this!
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Hello! Over the weekend I made some new labels for my fossil collection and I was wondering what everyone thought of them. I have QR codes which link to the corresponding "prehistoric-wildlife.com" species page for more info, and I added in some basic I.D. info to the cards to not crowd them. I also attached numbers to the labels and the fossils, so that I don't need to keep the labels directly next to the fossils. Would love to know what you think, and if anyone wants more information/the template I created. Thanks! P.S. Two of my I.D.s I'm still not 100% on (deltadromeus and Pectinodon) and I don't want anyone to assume I've completely I.D.ed them. Thanks!
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From the album: Dinosaurs and Reptiles
