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Plateosaurus (Dinosaur)

DataBase Center for Life Science (DBCLS), Plateosaurus
DataBase Center for Life Science (DBCLS)

Plateosaurus is a large, herbivorous dinosaur that roams the earth during the Late Triassic period. It measures up to 10 meters in length and weighs around 4,000 kilograms. It has a distinctive, long neck and tail, powerful hind legs, and a sturdy, robust body that can support its massive weight.

The Plateosaurus has a reptilian appearance, with rough, scaly skin that provides it with some protection against predators. Its legs are thick and muscular, with broad feet that can support its weight on both land and in water. Its long, narrow skull is filled with sharp teeth that it uses to tear through tough vegetation.

Despite its large size, the Plateosaurus is relatively agile and can move quickly when it needs to. It can walk on both two and four legs, depending on its needs, and can run at speeds of up to 20 kilometers per hour. It also has a good sense of balance, which allows it to navigate through rough terrain with ease.

The Plateosaurus is a herbivore, and its diet consists mainly of low-lying vegetation, such as ferns and horsetails. It has a long, prehensile tongue that it uses to grasp and pull vegetation into its mouth. It also has a unique digestive system that allows it to extract as much nutrition as possible from the tough plants it eats.

Despite its impressive size and strength, the Plateosaurus is not invincible. It has many natural predators, including large carnivorous dinosaurs like Allosaurus and Ceratosaurus. To protect itself, the Plateosaurus can use its powerful hind legs to kick or run away, or it can use its sharp teeth to bite and defend itself. It may also use its long tail as a whip to deter predators.

Overall, the Plateosaurus is an incredible creature that played a significant role in the ecosystem of the Late Triassic period. Its size, strength, and unique adaptations allowed it to thrive in a world filled with danger and competition.


Medium beast, unaligned

Armor Class: 14 (natural armor)

Hit Points: 76 (9d8+27)

Speed: 40 ft.

18 (+4)12 (+1)16 (+3)2 (-4)13 (+1)5 (-3)

Skills: Athletics +6, Perception +3

Senses: passive Perception 13


Challenge Rating: 3


Multiattack: The Plateosaurus can make two attacks: one with its bite and one with its tail.

  • Bite: Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 4) piercing damage.
  • Tail: Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 8 (1d8 + 4) bludgeoning damage.


Plateosaurus Roar: Once per day, the Plateosaurus can let out a deafening roar that can be heard up to a mile away. All creatures within a 30 ft. radius must make a DC 14 Wisdom saving throw or be frightened for 1 minute.

Physical Description

The Plateosaurus is a large, bipedal dinosaur with a long neck and a long, thick tail. Its body is covered in rough, scaly skin that is a dull greenish-brown color. It has sharp, serrated teeth and powerful jaws that it uses to crush vegetation and prey alike. Its legs are strong and sturdy, allowing it to move quickly over rough terrain. The Plateosaurus stands around 9 feet tall at the hips and can reach lengths of up to 33 feet. Despite its size, the Plateosaurus is surprisingly agile and can move quickly when necessary.

Dinosaur, Plateosaurus

A herbivore that generally moves about on all fours. They travel in herds that migrate from feeding ground to feeding ground and are common prey for larger carnivores.

Originally Posted by Shade of the En World forums.  
On this Thread

This creature has a powerful tail, a long neck, and broad claws on its front legs. Plateosaurs are one of the largest and most advanced forms of prosauropods, the primitive cousins of such giants as the seismosaurus. A plateosaurus is about 30 feet long, although specimens as long as 40 feet have been reported. They live in large herds, browsing on low-lying vegetation. They can and do rear up on their hind legs in order to reach tall branches, and in order to defend themselves.

Dinosaur, Plateosaurus
Huge animal
Hit Dice8d8+40 (76 hp)
Speed30 ft. (6 squares)
Armor Class14 (-2 size, +6 natural), touch 8, flat-footed 14
Base Attack/Grapple+6/+20
AttackClaw +10 melee (2d6+6)
Full Attack2 claws +10 melee (2d6+6) and tail slam +8 melee (2d8+3)
Space/Reach15 ft./10 ft.
Special AttacksTrample 2d12+9
Special QualitiesLow-Light Vision, Scent
SavesFort +12, Ref +6, Will +3
AbilitiesStrength 22, Dexterity 11, Constitution 18, Intelligence 1, Wisdom 13, Charisma 7
SkillsListen +8, Spot +9
FeatsAlertness, Great Fortitude, Multiattack
EnvironmentWarm deserts and forests
OrganizationSolitary, pair or herd (5-20)
Challenge Rating5
AlignmentAlways neutral
Advancement9-16 HD (Huge), 17-24 HD (Gargantuan)
Level Adjustment


A plateosaurus will usually try to trample its opponent before staying to fight, but if cornered or surrounded rears up on its hind legs and fights with its claws and powerful tail.

Trample (Ex): A plateosaurus can literally run over any creatures in its way that are of Large or smaller size. Creatures trampled must make a Reflex save (DC 20 half) or take 2d12+9 damage. The save DC is Strength-based.

Originally appeared in Monster Manual (1977).

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