You heard it here first: Daemonosaurus is an ornithischian

This one snuck under my radar until Professor Thom Holtz mentioned it on the Dinosaur Mailing List. Writing about the Baron et al 2017 reply to Langer et al. we looked at earlier, Holtz wrote: “Novel discovery is Daemonosaurus as a basal … Continue reading

You heard it here first: Chilesaurus is a basal ornithischian confirmed.

A new paper by Baron and Barrett 2017 confirms Chilesaurus (Fig. 1) as a basal member of the Ornithischia, not a bizarre theropod. As long time readers know, this was put online two years ago (other links below) in this blog. Unfortunately, … Continue reading

You heard it here first: no gender differences detected in pterosaur pelves

A new paper on wukongopterid crests (Cheng et al. 2017) reports, “We also show that there is no significant variation in the anatomy of the pelvis of crested and crestless specimens. We further revisit the discussion regarding the function of cranial structures in … Continue reading

You heard it here first: Lagerpeton is NOT a dinosauromorph

Thanks to Dr. Max Langer for sending this abstract. Five years after Lagerpeton was removed from the Dinosauromorpha online here, Novas and Agnolin 2016 follow suit by nesting Lagerpeton with Tropidosuchus, among the Proterochampsidae. This is confirmation of methodology and the value of … Continue reading

You heard it here first… four years ago. Diandongosuchus is a stem phytosaur. timestamps every post This one comes from August 29, 2012. “Diandongosuchus. Not a basal poposauroid. A basal phytosaur.” Click here to see the original discovery and post. Click here to see the page on Diandongosuchus (Fig. 1). Click … Continue reading

Was the first dinosaur egg soft?

Norell et al. (8 co-authors) 2020 used phylogenetic bracketing to determine that the first dinosaur egg (still unknown) was soft. They made one mistake that invalidates their phylogenetic bracket (Fig. 1). From the Norell et al. abstract: “However, pterosaurs—the sister … Continue reading

First non-pterodactyloid pterosaurian trackways ever described? …No

Updated April 18. 2020 The four-fingered manus tracks (identified below out of context as a rhamphorhynchid pes track) belong to a tenrec, not a pterosaur. Details here.  Mazin and Pouech 2020 report on basal pterosaur tracks from the “Pterosaur Beach … Continue reading

SVP abstracts – First largepetid pectorals and forelimbs

McCabe and Nesbitt 2019 present the first pectorals and forelimbs for Lagerpeton (Fig. 1), a taxon previously known from hind limbs and pelvic region, plus some dorsals, some caudal vertebrae only. From the abstract: “The posture of the earliest dinosaurs is … Continue reading

You heard it here in 2011: diadectids are amniotes

Co-author, David S. Berman, has been saying diadectids are amniotes since the 1990s, but not with a comprehensive taxon list, and, apparently nobody listened. The consensus apparently prefers their diadectids with tadpoles. Here’s what Wikipedia reports “Diadectes (meaning crosswise-biter) is an extinct genus of … Continue reading

This month: 8 years of PterosaurHeresies and has been the daily blogpost for additions and changes to, a growing, illustrated, and sometimes animated online study of vertebrate morphology and interrelationships. This month marks eight years online. At the core of this ongoing published (but not peer-reviewed … Continue reading