#tyrannosauroidea

[crocuta1]

Callie... watcha got there......?

[stavrosskundromichalis]

The iconic Tyrannosaurus rex on a Saturday morning 🦖 Realized that I haven’t made a serious attempt to draw t-rex since the nineties! 😳

[ppaleoartistgallery]

#Paleostream 22/06/2024

here's today's #Paleostream sketches!!!

today we drew Lokiceratops, Argentavis, Dryptosaurus, and Diabloceratops (grrrrrr all dinosaurs.....)

[jurassicjoowan]

Jurassic Park-inspired Tyrannosaurus rex studies, BUT colored.

It was a lot of fun to work on, since it's making my sense of dinosaur anatomy and especially coloring. The color of The Lost World's Buck tyrannosaur works really well with an relatively accurate tyrannosaur depiction. This really helped get me out of my recent creative burnout haha

[new-dinosaurs]

Asiatyrannus xui Zheng et al., 2024 (new genus and species)

(Skull of Asiatyrannus xui, from Zheng et al., 2024)

Meaning of name: Asiatyrannus = Asia tyrant [in Latin]; xui = for Xu Xing [Chinese paleontologist]

Age: Late Cretaceous (Maastrichtian)

Where found: Nanxiong Formation, Jiangxi, China

How much is known: Partial skeleton of one individual, including a nearly complete skull, some hindlimb bones, and several tail vertebrae.

Notes: Asiatyrannus was a tyrannosaurid theropod, making it a fairly close relative to Tyrannosaurus. It is the second tyrannosaurid to be named from the Nanxiong Formation, the first being the much larger and longer-snouted Qianzhousaurus. Indeed, Asiatyrannus was small for a tyrannosaurid, estimated as having been 3.5–4 m long in total body length.

Although other supposed "small" tyrannosaurids had previously been named, these turned out to have been based on immature specimens. Based on microscopic examination of its bone structure, the describers of Asiatyrannus suggest that the type specimen had not finished growing when it died, but its growth had slowed down such that it was close to reaching its full size. It is estimated to have been at least 13 years old at the time of its death.

Reference: Zheng, W., X. Jin, J. Xie, and T. Du. 2024. The first deep-snouted tyrannosaur from Upper Cretaceous Ganzhou City of southeastern China. Scientific Reports 14: 16276. doi: 10.1038/s41598-024-66278-5

[makairodonx]

Breaking News! Just when Hispanic Heritage Month is coming to an end, Mexico has just announced the discovery of Labocania aguillonae, a whole new species of Tyrannosaurid theropod hailing from the Campanian La Bocana Roja Formation of Baja California Norte, and the hype to doodle this fantastic beast that happens to be the country’s latest dinosaur is real.

So here is the first illustration of this new Tyrannosaur species ever made!

References:

https://www.mdpi.com/2813-6284/2/4/12

[ildarotyrannus]

Red sketch of Yutyrannus huali, a large basal tyrannosauroid from the Early Cretaceous of the Yixian Formation (northeast China). It is the largest described dinosaur with evidence of feathers. Individual filaments on the neck reached up to 20 cm in length (I tried to reflect this fact in the drawing).

Paint, 2024.

[paleoforest]

Yo, here's some old 🦖s from 2022-2023. They're crooked, but I don't care

[kaliido-s]

was in a paleoart mood yesterday

drew Qianzhousaurus since that species has always been tricky for me

[hasellia]

Movie Day by Itaru Kinoshita @Kurinosukeboy on Twitter

[sombertide-0]

making a fluffy dinosaur series, starting with the famous Tyrannosaurus rex!

[crocuta1]

More poptart 😋

[mineralsrocksandfossiltalks]

Wordplay Wednesday: Ending for taxonomic classifications

One Monday, you would have noticed I used several very large, very similar words. Today, I am going discuss and define a few: tyrannosauroidea, tyrannosauridae, tyrannosaurid, tyrannosaurinae, tyrannosaur, Tyrannosaurus. They all look pretty much the same, right? They do all have different meanings and references though.

First, tyrannosauroidea. This refers to the superfamily that encompasses several families including coelurians, proceratosaurids, megaraptorans, and eutyrannosaurs.

The suffix -oidea, means "like" or "resembling" so when combined with "tyrannosaur" it means "like or resembling tyrant lizards". This is tyrannosaurs and all their closest relatives. You may hear this in other contexts such as mineraloids (like minerals),

or metalloids (like metals).

Tyrannosauridae is a family within the superfamily tyrannosauroidea. Sometimes, we shorten it to tyrannosaurids. It also means "like or resembling" but in this case it is used to indicate a taxonomic family.

A British entomologist named William Kirby introduced the suffix as a way to standardize naming (which is extra important for someone who studies insects and other really small critters).

The suffix -inae is used to denote a subfamily. So, Tyrannosaurinae is a subfamily within the family Tyrannosauridae within the superfamily Tyrannosauroidea. Clear as mud, right?

Tyrannosaur is another short for so we don't have to right all these long words. Not that tyrannosaur is a short word but it is shorter than the other ones.

Finally, Tyrannosaurus is a genus within the subfamily tyrannosaurinae within the family tyrannosauridae within the superfamily tyrannosauroidea.

Oh, did I mention tyrannosaurini? Nope? Well, that is a tribe within the subfamily tyrannosaurinae. That tribe only includes Tarbosaurus (Tyrannosaurus) bataar, Tyrannosaurus rex and Tyrannosaurus mcraeensis.

So, in review:

Tune in tomorrow to learn about the man who named Tyrannosaurus rex. Fossilize you later!

[manusuchus]

"Eyelids of Morning"

Two young Daspletosaurus wilsoni patrol their newly acquired territory.

[korppipoika]

Just a yutyrannus enjoying sun light after a long and dark winter..! 

[new-dinosaurs]

Tyrannosaurus mcraeensis Dalman et al., 2024 (new species)

(Lower jaw bones of Tyrannosaurus mcraeensis [scale bar = 20 cm], from Dalman et al., 2024)

Meaning of name: mcraeensis = from the McRae Group

Age: Late Cretaceous (Campanian or Maastrichtian)

Where found: Hall Lake Formation, New Mexico, U.S.A.

How much is known: Partial skull and parts of the tail vertebrae of one individual.

Notes: In recent years, the genus Tyrannosaurus has generally been considered to consist of only one well-established species, T. rex. However, a new study argues that the type specimen of T. mcraeensis should be considered a new species based on various differences in the shape of its skull bones, as well as the fact that it may have been up to 7 million years older than T. rex. T. mcraeensis was about the same size as T. rex, so if this is accurate, it may suggest that the ancestors of Tyrannosaurus evolved their giant body size in the southern parts of North America. That being said, not all tyrannosaurid researchers are convinced of the distinctiveness and age of T. mcraeensis.

Reference: Dalman, S.G., M.A. Loewen, R.A. Pyron, S.E. Jasinski, D.E. Malinzak, S.G. Lucas, A.R. Fiorillo, P.J. Currie, and N.R. Longrich. 2024. A giant tyrannosaur from the Campanian–Maastrichtian of southern North America and the evolution of tyrannosaurid gigantism. Scientific Reports 13: 22124. doi: 10.1038/s41598-023-47011-0