#Siamosaurus

[alex-fictus]

My favorite tiktok I’ve made in a while lol

[impulseimpact]

day 11 irritator

[mesozoicmarket]

A partial dinosaur tooth of an Ichthyovenator laosensis from the Grès supérieurs Formation in the Savannakhet Province of Laos. The tooth has around 44 ridges which distinguishes it from the tooth taxon, cf. Siamosaurus sp. The morphology described or assigned to Icthyovenator (from the similarly aged Khok Kruat Formation) have a ridge total (both sides combined) of 42-64, while 22-32 ridges are assigned to teeth similar to those of the tooth taxon Siamosaurus suteethorni from the older Sao Khua Formation. While this may be sample bias, the vast majority of teeth from the Grès supérieurs Formation appear to be cf. Siamosaurus rather than Ichthyovenator.

[fundinofactoftheday]

Dinofact #100

Siamosaurus was the first spinosaurid dinosaur reported in Asia. It is known confidently only from teeth, and it yet undetermined if two partial spinosaurid skeletons from Thailand and an isolated tooth from Japan also belong to the genus.

Source: Wikipedia

[raviotheraviolis]

I was feeling silly

[bunjywunjy]

ujst went through a lot of your wexter posts. anyway i have a siamosaurus (hher name is rapidz and hses trans) adn im considerign getting her a collar. how do oyu get tiny collars for a dinosaur is my question

nice! I got the smallest dog collar that petsmart had and resized it by hand. don't recommend using a regular sewing needle for that though, it sucked D:

[mangoark]

Massospondylus, gigantoraptor, fasolasuchus, brachiosaurus, siamosaurus, jiangjunosaurus

[dinotale]

Undyne and Alphys, the most unlikely of pairs!

A siamosaurus and stygimoloch respectively, they have the most unlikely of bonds! Being from different eras and separate food preferences, it makes their companionship all the more special.

[dinophotography]

Siamosaurus

[alex-fictus]

Spinosaurids!! It’s more than likely this is a post of several different Baryonyxes, Spinosauruses, and 1 (One) Suchomimus. But here’s the intended species

Spinosaurus - Irritator - Suchomimus

Ichthyovenator - Baryonyx - Siamosaurus

Oxalaia - Ceratosuchops - Iberospinus

Not pictured bc it won’t lemme upload 3 more:

Sigilmassasaurus - Riparovenator - Vaillabonaventrix

[i-draws-dinosaurs]

Spinosauridae Series part 2!

And this completes all the spinosaur species that are known from anything even approaching decent material, and even that’s a bit of a stretch! This clade is a bit of a trash pile sometimes.

Featuring from top to bottom:

A very hypothetical reconstruction of Irritator challengeri. All we know from this spinosaur is a skull, so whatever the body looked like is pretty much a total guess. I’ve modeled it after Spinosaurus since they’re closely related in the spinosaur phylogeny, but there’s really no way of knowing what the rest of the body looked like.

Ichthyovenator laosensis, a spinosaud with a weird notched sail and what could possibly be a paddle tail similar to that of Spinosaurus.

And finally, the Indeterminate Phuwiang Spinosaurid (IPS), based on a partial skeleton from Phuwiang, Thailand. It has been referred to Siamosaurus, but since that taxon is a complete garbage fire (see my previous post on the matter) this skeletal material cannot be confidently assigned to Siamosaurus. Honestly even with how fragmentary the IPS is, it was still easier than drawing Irritator, because at least we know roughly what body shape IPS had.

[mesozoicmarket]

A dinosaur tooth of the spinosaurid tooth taxon, cf. Siamosaurus sp. from the Grès supérieurs Formation in the Savannakhet Province of Laos. The 22-23 ridges suggest Siamosaurus, but could still be Ichthyovenator laosensis. In comparison, Ichthyovenator is described as having a total ridge count between 42 to 64. It should be noted that this is not referring to the original Siamosaurus suteethorni from the Sao Khua Formation, but a similar morphology referred to Siamosaurus sp. from the younger Khok Kruat Formation.

[the-tigrou]

And here's another colorful dino lmao That's so weird to draw dinos again, my style clearly changed 😂 This is a Siamosaurus (Siamosaurus Suteethorni) Adopted from ToonsAdopts

[a-dinosaur-a-day]

Siamosaurus suteethorni

By Michael B. H., CC BY-SA 3.0 

Etymology: Reptile from Siam

First Described By: Buffetaut & INgavat, 1986

Classification: Dinosauromorpha, Dinosauriformes, Dracohors, Dinosauria, Saurischia, Eusaurischia, Theropoda, Neotheropoda, Averostra, Tetanurae, Orionides, Megalosauroidea, Megalosauria, Spinosauridae, Spinosaurinae

Status: Extinct

Time and Place: About 129 million years ago, in the Barremian of the Early Cretaceous 

Siamosaurus is known from the Sao Khua Formation of Thailand 

Physical Description: Siamosaurus is not known from extensive fossil remains - indeed, it is known from only teeth that are very similar to those of Spinosaurus, leading to its classification as a close relative. So, if it is a dinosaur like Spinosaurus, it probably would have been a bipedal theropod, with long front limbs ending in extensive claws for grabbing fish. Siamosaurus would have probably had a long, crocodile-esque jaw,and some sort of sail or hump on its back. It would have most likely been primarily scaly. Beyond that, we can’t be entirely sure what Siamosaurus would have looked like.

Diet: Siamosaurus would have primarily eaten fish.

Behavior: Like Spinosaurus, Siamosaurus would have spent most of its time near or in the water, hunting for fish and swimming about in its ecosystem looking for more food. It probably would have been at least somewhat solitary, given the difficulty of fishing as a lifestyle for shoreline animals - crocodilians and bears, for example, tend to fish alone. But, Siamosaurus probably would have been fairly active in lifestyle, and probably would have taken care of its young. It may have been semiaquatic, but this has been disputed for other Spinosaurs. 

By Offy & PaleoGeekSquared, CC BY-SA 4.0 

Ecosystem: Siamosaurus lived in a muddy, tropical forest, filled with a variety of hot-weather plants right on the equator. This ecosystem featured a variety of fish and sharks, including such famous ones as Lepidotes and Hybodus. These fish would have been ideal prey for Siamosaurus. Turtles were frequent along the river ecosystem, and may have also been fed upon by Siamosaurus. There were competitors, too - pseudosuchians such as Theriosuchus, Khoratosuchus, Goniopholis, and Siamosuchus. Other dinosaurs also made up the ecosystem, though none are particularly well known - the titanosaur Phuwiangosaurus, the iguanodonts Siamodon and Sirindhorna, the carnosaur Siamotyrannus, and the ornithomimosaur Kinnareemimus. The titanosaur Phuwiangosaurus, in particular, was very common in this environment. 

By Ripley Cook

Other: Siamosaurus is difficult to place accurately in terms of phylogeny, given it is only known from teeth.

~ By Meig Dickson

Sources under the Cut 

Amiot, R.; Buffetaut, E.; Lécuyer, C.; Wang, X.; Boudad, L.; Ding, Z.; Fourel, F.; Hutt, S.; Martineau, F.; Medeiros, A.; Mo, J.; Simon, L.; Suteethorn, V.; Sweetman, S.; Tong, H.; Zhang, F.; Zhou, Z. (2010). "Oxygen isotope evidence for semi-aquatic habits among spinosaurid theropods". Geology. 38 (2): 139–142.

Arden, T.M.S.; Klein, C.G.; Zouhri, S.; Longrich, N.R. (2018). "Aquatic adaptation in the skull of carnivorous dinosaurs (Theropoda: Spinosauridae) and the evolution of aquatic habits in Spinosaurus". Cretaceous Research. In Press.

Buffetaut, E.; and Ingevat, R. (1986). Unusual theropod dinosaur teeth from the Upper Jurassic of Phu Wiang, northeastern Thailand. Rev. Paleobiol. 5: 217-220.

Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 563-570.

[spinosauridae]

At Walmart I saw a Siamosaurus Jurassic World toy

And I will never recover

[mangoark]

Siamosaurus, ambulocetus, alpha draconis glaucus, sunken dunkleosteos, edestus, sunken plesiosaurus, anomalocaris