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Preprint Published: Theropod Specimens from the Navesink Formation

Hi there everyone. I just wanted to note that my preprint on ornithomimosaur and tyrannosauroid hindlimb elements from the Maastrichtian Navesink Formation of Monmouth County, New Jersey, has been published. Recently, the taxon “Teihevenator” was erected by Yun (2017)(it’s a nomen nudum because the Zoobank LSID for the name wasn’t included in the paper and the paper doesn’t seem to publish copies)(for more discussion of this see my preprint on a tyrannosauroid from the Merchantville Formation of Delaware(1) and this post at the Theropod Database Blog). I was also working on these specimens during the time Yun (2017) was published describing AMNH 2550-2553 as a new genus, with myself describing them as a chimaera of ornithomimosaur and tyrannosauroid remains. As such, upon hearing of the publication of Yun (2017), I finished up my figures of the specimens and submitted it for publication as a preprint, which you can find here. I love hearing from all of you, so please don’t hesitate to leave comments on this post or on the preprint itself regarding the manuscript!

Thanks again for reading!

 

Refs-

Yun C. 2017. Teihivenator gen. nov., a new generic name for the tyrannosauroid dinosaur “Laelaps” macropus (Cope, 1868; preoccupied by Koch, 1836). Journal of Zoological and Bioscience Research 4(2):7-13.

 

Footnotes-

(1) The metatarsals II and IV are from Delaware. Though I only named the state of discovery of these specimens twice incorrectly in the manuscript, I made an error and for some odd reason thought the specimens were found several miles east of Summit Bridge. This error has been corrected in my working copy of the manuscript and I have addressed it by adding an erratum in the comments section of the manuscript.

 

 

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Preprint Published: A Tyrannosauroid Metatarsus from the Merchantville Formation of Delaware increases the diversity of non-Tyrannosaurid Tyrannosauroids on Appalachia

Hello everyone. Recently, I have worked on describing several tyrannosaur specimens from the Cretaceous Formations of Atlantic Coastal Plain. One of the manuscripts I have written concerns a partial tyrannosaur metatarsus from the Merchantville Formation of Delaware. As of now, the preprint of this paper has been published, and you can find it here:

https://peerj.com/preprints/3097/

The metatarsus represents a distinct morphotype of tyrannosaur from Dryptosaurus or Appalachiosaurus, but nevertheless is too incomplete and lacking in distinguishing features to warrant the naming of a new specimen. Certainly, the diversity of tyrannosauroids on Appalachia has been underestimated.

 

An Interesting Encounter at Lunch: Chelydra serpentina

Hi everyone! This will be a short post, but one regarding an interesting sighting I had while having lunch at a local diner today. The diner, known aptly as the Lakeside Diner (info), sits on a lake that is frequented by many bird species. Besides the common grackle, blue jay, and house sparrows I saw today, another denizen of the water made an appearance. As a brown rat was getting ready to head back into the water, a large beak made a splash as it grabbed the poor rodent and dragged it into the lake. It was none other than the maw of a common snapping turtle, Chelydra serpentina.

This turtle, covered in knobs and scales, was around three or so feet in length. It was quite the lake resident. As it plunged back into the murky water, I was able to get some photos of its rugged back and tail. Here they are:

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It goes to show that even in the suburban setting of Stamford, Connecticut, truly incredible species may be found.

Earth Day 2017: A Call to be Active in Conservation and Environmentalism

Ever since the end of 2016, I’ve been obsessively scrolling around the planet on Google Earth in my spare time. I’ve realized that I’m not doing this because I’m worried about what we might lose in the future, but because I’m nervous of what we have already lost today. Perhaps this notion of mine is because of my work and interest in paleontology. I’m liable to be looking to the past, not the present. Our current crisis, however, is too close for comfort for me, even in looking at it with a purely scientific perspective.

Late in the afternoon today, I took a hike in the Mianus River Gorge Preserve (their website is here), a beautiful stretch of land in New York that preserves an old growth forest of Hemlock trees that was not logged and turned into farmland due to taking up residence on the steep slopes of the gorge. This preserve was actually the first of the Nature Conservancy’s preserves and the first National Natural History Landmark in the United States , and walking through the gorge and old growth forest gave me a minute or two to think about conservation in general.

The land of the preserve bears scars from when humans exploited the countryside for its land, with the difference between the old-growth forest and the secondary growth forest growing above collapsed stone walls stark. Deforestation leaves its scars. As I read about the sudden uptick in deforestation in the Amazon rainforest, the old rock walls which populate the forest floor around myself come to mind.

In previous years, I’ve written articles on this blog on Earth day in celebration. I’m not so sure I can today. Science and the environment are under heavy attack from powerful forces political and economic. It’s up to everyone to stand up for the planet, as many demonstrated today by marching at the March for Science and its sister marches across the globe. Though I couldn’t join them today, I’ve been for my part trying to contact my legislators as much as possible regarding conservation and other issues and donating to conservation organizations among others when I can. Yet the scariness of the moment doesn’t cease. All I can say is that I think it’s going to be a long few years ahead for science and conservation, but with a little luck and a lot of work things will turn out all right. Happy Earth Day.

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Rocky Mountain National Park, Colorado. Photo by the author. 

 

 

A New Theory on the Apex Predators of Appalachia

Hello everyone!  I’d like to share with you some recent developments regarding the study of dinosaurs from the eastern United States. Some new exciting research by Gotya et al. (2017) suggests that the apex predators of the continent were neither tyrannosauroids like Dryptosaurus aquilunguis nor huge crocodyliform taxa like Deinosuchus rugosus. 

Gotya et al. (2017) suggest, contrary to previous research, that Appalachia was in fact the home of large relatives of the pitcher plant genus Sarracenia. These plants, named Lythrophytum giganticum (“giant gore plant”), are thought by Gotya et al. (2017) to have grown in large groves, with each plant’s mouth heavily widened to ingest large prey. Through molecular studies of the fossils of this large pitcher plant, Gotya et al. (2017) concluded that the L. giganticum emitted a sweet smell to draw in medium-sized herbivorous dinosaurs and other large herbivores. Then, the action of the herbivores biting the flower would cause the plant to release a highly toxic substance that would paralyze the herbivore. Then, with the herbivore immobilized, the heat of the herbivore’s body would cause each of the flowers of the L. giganticum plants to turn towards the plant’s paralyzed prey, excreting an acidic solution to dissolve the body. Once dissolved, the nutrients of the herbivore would be absorbed by the plants. I have illustrated the proposed process below for better clarity.

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Completely Accurate Restoration. 

I’m very interested to see how work on these giant Mesozoic plants progresses into the future. For more information, click on the link to the paper below:

Gotya HA, Aprille FO, Ferst OLS. 2017. New fossils from the Late Cretaceous of the eastern United States provide evidence for carnivorous plants being the apex predators of Appalachia, or something. Journal of Creepy Creatures 24: 114-122.

Article: Description of Arundel Clay ornithomimosaur material and a reinterpretation of Nedcolbertia justinhofmanni as an “Ostrich Dinosaur”: biogeographic implications

Hi there everyone! My article on ornithomimosaur remains from the Arundel Formation of Maryland was published today at the journal PeerJ. If you have time and are interested in Cretaceous dinosaurs from eastern North America, please check it out here. That’s all for now.

P.S. I have been very busy with several things lately, but I hope to write a few new blog posts in the coming weeks. Thanks again for reading.

Women in Paleontology: Mignon Talbot

Happy International Women’s Day everyone! Today, we are reminded of the struggles women have faced and still face around the globe as well as the countless contributions they have made and continue to make today to our world. I thus wanted to highlight one woman who contributed to paleontology in the eastern United States.

Mignon Talbot was born four years after the end of the Civil War in Iowa City, Iowa (Elder, 1982). Receiving her undergraduate education at Ohio State University, Talbot would go on to Yale to receive her doctorate in 1904 and would be appointed as an instructor of geology at Mt. Holyoke the same year (Elder, 1982). Dr. Talbot quickly ascended the ranks to become the chairman of the Geology department in 1908, and in 1929 would become chairman of both the Geology and Geography departments (Elder, 1982).

Over the course of her career, Dr. Talbot would greatly expand the Triassic ichnofossil and mineral collection at Mt. Holyoke, continuing to passionately do so even after a fire in 1916 would destroy most of the collection (Elder, 1982).

She would also publish a review of crinoids from the early Devonian (Helderbergian) strata of the state of New York (Talbot, 1905). This work would be part of her dissertation, for which she would have the trilobite researcher Dr. Charles Emerson Beecher as a supervisor (Talbot, 1905).

Perhaps her most notable discovery, however, was that of the coelophysoid dinosaur Podokesaurus holyokensis. Dr. Talbot would discover the partial skeleton of this dinosaur encased in cracked bolder near the college in 1910, becoming the first woman to name a non-avian dinosaur species the following year (Talbot, 1911; Turner, Burek & Moody, 2010). Dr. Talbot would remark on the chance of the find in the American Journal of Science in June of 1911 (Albino, accessed March 8, 2015). She would name Podokesaurus from the greek word for swift-footed, referencing the name of the university for which she worked in the specific epithet (Talbot, 1911).

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Cast of the holotype of Podokesaurus on display at the Peabody Museum. Photo by the author, 2015.

Unfortunately, the skeleton of Dr. Talbot’s dinosaur would be destroyed in the 1916 fire that burned down Williston Hall (Albino, accessed March 8, 2015). Talbot would notably remark that she wished the specimen to go on exhibition at Yale or in Washington in the June 1911 issue of the American Journal of Science mentioned previously (Albino, accessed March 8, 2015). Nevertheless, Talbot was largely responsible for the growth of the Holyoke collection after the fire (Elder, 1982). She said to have been actively interested in the profession of paleontology to her death in 1950 (Elder, 1982).

Her contributions to paleontology in the eastern United States are invaluable. The specimen she discovered and described, though now destroyed, is one of the only skeletons of a dinosaur known from the east coast. She will forever remain the first woman to name one of the marvelous lizards.

For more on Podokesaurus, see this post.

References.

Elder E. 1982. Women in Early Geology. Journal of Geological Education 30(5): 287–293.

Talbot M. 1905. Revision of the New York Helderbergian crinoids. American Journal of Science (Series 4) 20(115): 17-34.

Talbot M. 1911. Podokesaurus holyokensis, a new dinosaur of the Connecticut Valley. American Journal of Science 31: 469-479

Turner S, Burek C & Moody RT. 2010. Forgotten women in an extinct Saurian ‘mans’ World. In Moody RT, Buffetaut E, Martill D, Naish D, eds: Dinosaurs and Other Extinct Saurians: A Historical Perspective. The Geological Society of London Special Publication 343: 111-153.

Albino D. Lost Dinosaur. URL:  http://www.mtholyoke.edu/~dalbino/books/lester/dinosaur.html. Accessed March 8, 2017.