STL Science Center

STL Science Center

23 June 2017

Illustrated or Not

As usual this week, this entry is a little shorter than our typical entries for any given subject. As interesting as illustrations about Triassic subjects can be, especially considering the majority of these animals that are illustrated are early dinosaurs. Dinosaurs that do not look much like what people expect dinosaurs to be are intriguing and sometimes confusing to many people; this is a conversation I have had many times over with random people. One of the more interesting illustrations that does exist of Efraasia is slightly older and depicts Efraasia walking almost quadrupedally, but with its hindlimbs in a position that suggests bipedal locomotion. This illustration, like all the other illustrations of Efraasia simply depicts the animal as is by itself and without any kind of background. This version of the sauropodomorph is simple, but does have odd fingers, and is somewhat salamander like in its general appearance.

22 June 2017

Size of the Dinosaur

Efraasia was originally considered to be a small animal, based on fragmentary remains that could not be assembled extremely well, but it was later realized that the animal was much larger than believed. The estimated larger size is approximately 6.5m (21 ft). The dinosaur was still small for its size, but by small we mean gracile and lightly built rather than short or thin. The gracile hands and feet of the animal could be used to imply facultative quadrupedalism, though this is also implied by the fact that may other very early sauropodomorphs were known to be capable of moving bipedally and quadrupedally equally well. Poor pronation of the forearm, as some have hypothesized, may have limited Efraasia as an entirely bipedal dinosaur. Its gracile hands and digits were probably quite capable of grasping food items (and predatory animals and intraspecific competitors) which could then enable it to better survive its environment by adapting its diet (and defending itself more capably).

20 June 2017

Writing in Efraasia

We mentioned a number of articles, descriptions, and re-descriptions of Efraasia and thankfully there are a lot of examples of this writing hosted online in many different places. Only one of these writings is entirely about Efraasia and that is the Galton 1973 article that was previously described here. The paper (hosted on Springer's site), as many may remember, re-described a number of specimens collected by Eberhard Fraas and reassigned these specimens to a new genus named after a contraction of the collector's name; Eberhard Fraas was turned into the name Efraasia minor in this dinosaur.

19 June 2017

Efraasia in Motion?

Unfortunately Efraasia never made it, yet at least, into any documentaries, cartoons, or movies. There really are not too many movies that use Triassic animals though, so the fact that it has not been in any movies is a little less surprising than the idea that it has not been in any documentaries. Cartoon dinosaurs are typically the more famous of the dinosaurs, so its exclusion from cartoons is equally anti-climactic. The only other video online, actually, is from a young man reading about and discussing Efraasia from Stephen Brusatte's published dinosaur field guide. Barring any other videos, which I would gladly post, here is the single video that is out there:

18 June 2017

A Known Dinosaur

Efraasia is a well known dinosaur and has some of our typical webpages (e.g. Prehistoric Wildlife and Dinosaur Facts) to share facts about this sauropodomorph. These facts are read over a great set of images in the following WizScience video.

17 June 2017

Lesser Sauropodomorphs

Efraasia minor (von Huene, 1907–1908) was a gracile middle-sized sauropodomorph of the Late Triassic of Germany. The name was not actually coined by von Huene, despite the fact that he originally described the fossil remains. The name von Huene gave the remains was Teratosaurus minor; this genus is a group of rauisuchians, which Efraasia was deemed to not be a member of. The name we use was coined by Peter Galton in 1973 when he reassigned a number of specimens to the new genus named after the collector of the specimens, Eberhard Fraas. Estimated at approximately 6 to 7m (20 to 23ft), Efraasia is a respectable size for its time and place, but, as we can see, it appears to have been a rather generic looking early dinosaur; however, it is a generic dinosaur that stands out for a number of reasons that we will discuss this week.

16 June 2017

Plain Illustration

Most of the illustrations of Tarchia are fairly plain. These are mostly lateral views of the dinosaur in a static posture that shows a lot of what the dinosaur could have looked like from the side. There are not very many dynamic poses that are out there of the dinosaur that show it by itself, but this is also okay. One of the best piece of art I have actually found relating to Tarchia is a statue. The statue is a scale model of both Tarchia and Tarbosaurus engaged in one of those epic dinosaur battles that has long captivated the public audiences. The art is a collaboration between Vladimir Trush and Vitaly Klatt. Trush appears to have sculpted a number of Tarchia inspired statues.