S is for...?

All of the S names in my Paleo Party - Mesozoic Edition! I have sooooooo many S names (Specifically in this group) I needed to make separate posts for the Eras lol

Are there any I'm missing?

Siamosaurus, only known from one fossil, that being just a fucking stupid useless little tooth. On top of that it's one of two asian spinosaurids, the other being ichthyovenator. So it's really hard to know what it looked like and I had to improvise quite a bit with it. Anyway another old sketch.

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.

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.

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 

My Mesozoic is Black, Grey, and White <3

Thalattoarchon - Dakosaurus - Tarbosaurus

Siamosaurus - Gargoyleosaurus - Moros intrepidus

Tsaagan - Atrociraptor - Female Passenger Pigeon