SE giants: the real titans (outdated)

I think that as a good way to finish the year and is to show a last and good amount of WIP, in this case about thee species that exist and that existed for the spec size chart, since, from the beginning, one of the original ideas for the first version was to expose several of the real giants of our world, but, because I was using silhouettes made by other people, I felt that they would contrast the art  styles too much, so I decided to take my time to create each animals too, and now at the end, here they are.

It has been somewhat complicated, since as many know, there is always one or another exaggeration, speculation or even misinformation about the maximum size reached by certain species, especially extinct species. So I have taken some precautions about it to avoid forming some kind of discussion about "this should be bigger". As, because this is still a WIP, there are still some missing species which I probably would add in the future.

Another thing, being honest, my skills to draw real animals as extinct are a bit rusty (or rather much) so sorry for some poor and deformed animal  

1) Giant clam (Tridacna gigas)

2) Coconut crab (Birgus latro)

3) Green anaconda (Eunectes murinus)

4) African bush elephant (Loxodonta africana)

5) Wandering albatross (Diomedea exulans)

6) Blue whale (Balaenoptera musculus)

7) Colossal squid (Mesonychoteuthis hamiltoni)

8) Japanese spider crab (Macrocheira kaempferi)

9) Whale shark (Rhincodon typus)

10) Polar bear (Ursus maritimus)

11) Ocean sunfish (Mola mola)

12) Chinese giant salamander (Andrias davidianus)

13) Common ostrich (Struthio camelus)

14) Leatherback sea turtle (Dermochelys coriacea)

15) Saltwater crocodile (Crocodylus porosus)

16) Giant barrel sponge (Xestospongia muta)

17) Komodo dragon (Varanus komodoensis)

18) Megalodon

19) Livyatan melvillei

20) Palaeoloxodon namadicus

21) Diprotodon

22) Arctotherium angustidens

23) Argentavis magnificens

24) Paraceratherium orgosensis

25) Dromornis stirtoni

26) Titanoboa cerrejonensis

27) Megalania

28) Sauropod

Okay, just to clarify, this is a representation without a specific genus or species, it is simply a sauropod because the reasons I said before.

29) Archelon ischyros

30) Tyrannosaurus rex

31) Triceratops

32) Ankylosaurus

33) Shantungosaurus

34) Stegosaurus

35) Quetzalcoatlus northropi

36) Shastasaurus sikanniensis

37) Platyceramus platinus

38) Leedsichthys problematicus

39) Mosasaurus

40) Sarcosuchus imperator

41) Spinosaurus aegyptiacus

42) Parapuzosia seppenradensis

43) Pliosaurus macromerus

44) Tapinocephalus

45) Anteosaurus

46) Prionosuchus

47) Cotylorhynchus

48) Dunkleosteus

49) Rhizodus

50) Arthropleura

51) Cameroceras

52) Aegirocassis

53) Jaekelopterus

54) Anomalocaris

__________________________________________________________________

Update: All species painted, in addition to slight changes and some new species added.
This is going to stay like this for now, so I will no longer accept suggestions about what other animals I should add, remember that these will only be a reference for the SE size chart so I will not delve into making the longest species of all animal groups.