Description
Finally, I can present my first work this year with a full-fledged background and color! This is Allosaurus jimmadseni resting in a fern prairie that will become part of the Morrison formation in the distant future. Thunderclouds are gathering on the horizon, and the air is cool... The resting predator will have to leave this place for safety....
Allosaurus jimmadseni is a species of the Allosaurus genus, described this year, but informally known for many years. It is distinguished based on cranial characteristics, including longitudinal ridges in front of the lacrimal horns, which are not present in the type species, A. fragilis. The description was made on the basis of two very complete specimens, one of which is "Big Al" (MOR 693), famous for its pathologies. Several other specimens, such as the "Big Al 2" (SMA 0005), were also assigned to the "new" species, and before that they were listed as A. fragilis or Allosaurus sp. It is worth adding that in the near future there should be a description of the postcranial skeleton of this species. Ecologically, A. jimmadseni was similar to other species of the genus - a top predator that hunted large dinosaurs.
I have long wanted to portray a fern "prairie", and this was a great opportunity to do so. As you can see, turned out not perfect, but I think it was pretty good for the first time. The ferns shown are mostly "random" (without exact taxonomic reference), but in the lower right corner you can see fronds of Coniopteris, one of the most common ferns of the late Jurassic. Allosaurus is based primarily on the 'Big Al", although it is a different specimen. Pathologies like a scar on the muzzle are here. The color is based on one of my previous allosaurs (see red spot), and partly on the perentie (Varanus giganteus). The clouds in the sky are not perfect, I know, but I hope they convey the atmosphere well.
Black gel ink and ballpoint pens, Krita, 2020.