Author Archives: Jaime A. Headden

Pale Spinos–Sigilmassasaurus

In my past comments regarding the strange theropod dinosaur Spinosaurus aegyptiacus, a small storm began to brew as to how, and where the vertebrae fit in a series. An aborted project to revise this series on the basis of comparison … Continue reading

Posted in Paleontology, Science Reporting, Taxonomy | Tagged , , , , , , , , | 10 Comments

The Best Little Oviraptorid in Mongolia

The sweaty summers of the mid 1970s give way to cooler climes indoors, as a block of sandstone pulled from the red-and-orange rocks of the Djadokhta Formation in Mongolia’s southern Gobi Desert finds itself in Ulaanbator, the nation’s capital. Initially … Continue reading

Posted in Art, Biology, Biomechanics, Paleobiology, Paleontology, Reconstruction, Science Reporting, Taphonomy | Tagged , , , , | 5 Comments

The Stocky Dragon

There is much we still do not know about the ancient origins of birds and near-bird animals, dromaeosaurs and troodontids. As we find more specimens of archaeopterygid or scansoriopterygid-like animals, of Anchiornises and what not, the tree becomes more of … Continue reading

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The Best Little Oviraptorid in Mongolia – Preview

As I wrote waaaay back in February of 2012 (damn!), my previous versions of the skeleton of the oviraptorid known as Citipati sp., or GIN 100/42 (or, simply “100/42”) were improperly scaled, improperly drawn, etc. Lots of errors, little means … Continue reading

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Herbivores All the Way Down

Back in the 1980s and 1990s, a revolution in the way dinosaurs were conceived to have evolved occurred, in which a basal stock of croc-ish animals (this was during the “thecodont origin of … everything (?)” phase of archosaur relationship … Continue reading

Posted in Art, Biological Comparison, Paleoecology, Paleontology, Reconstruction, Science Reporting | Tagged , , , , , , , | 17 Comments

Strange Tid[w]ings

The new small theropod Yi qi was described 29 April, 2015, far too late to be a practical joke for All Fools’ Day (by 4 weeks, precisely). Why would it be? The animal, described by Xu Xing and a number … Continue reading

Posted in Art, Biology, Paleobiology, Paleontology, Science Reporting | Tagged , , , , | 13 Comments

Facial Expressions

The various and many ways to make a “cheek,” and the various facial tissues for which we have primary (preserved remains) and secondary (inferred) evidence for, in fossil sauropsidans. (These images are CC-BY-ND-NC. Please don’t take them without permission.)

Posted in Art, Biological Comparison, Biology, Biomechanics, Paleobiology, Paleontology, Reconstruction | Tagged , , , , , , , | 6 Comments