Dr. Oliver Demuthさんのイラストまとめ

What do the results look like for Euparkeria? Blue=nose down, red=nose up. To be bipedal Euparkeria needed to be in the red area. All extant lizards are deeply blue and the results are robust. Euparkeria couldn't be bipedal if it moved similar to any bipedal lizard today! 10/15

So does this mean it was potentially bipedal? To get more nuanced insights we looked at the moments around the COM. Bipedal lizards run bipedally due to peak GRFs in early stance phase, pushing the GRF vector in front of the COM, and thus pushing the nose up. 9/15

We identified muscle attachments on the pelvis and hindlimbs and built the musculature in 3D! Based on those 3D muscles and muscle architectural data of crocodylians and lizards we estimated muscle parameters for our musculoskeletal simulations. 5/15

@WryCritic Here are some of my published skeletal illustrations. Euparkeria, several extant and extinct giant land animals and everyone's favorite: Tyrannosaurus, with its lunch ☠🦴. High-res version of the middle one can be found here: https://t.co/4jy7ttMqFQ

@MetTiinA @Sketchy_raptor This might be a bit further away than what you are looking for (i.e., Crocodile (L) & Euparkeria (R) ) but the muscles are all labelled and generally the same in all archosaurs. This is from our recent paper in 3d muscle modelling: https://t.co/p1cmshBctl

@gimpasaura

This afternoon I finished the illustration of another shark! 🦈 This time it is Sphyrna lewini, the Scalloped hammerhead shark. #SciArt #SundayFishSketch #WildLifeArt

@MetTiinA And another one, a section through the pectoral girdle

@MetTiinA Here are two illustrations from Frey 1988, giving a pretty good idea how it works in Alligators.

Spent this afternoon drawing and painting this cute little shark 🦈! Rhizoprionodon longurio, the Pacific sharpnose shark. #SciArt #WildLifeArt