Prosauropods
Bipedal Prosauropods
Bipedal prosauropods have massive tails which account for roughly half their body length, barrel-like bodies supported on strong hind legs and short but sturdy forearms whose 5-fingered hands are equipped with sturdy claws, with an enlarged claw on their innermost digit (the "thumb"). Their heads are fairly small, on a quite long neck. They have small, serrated teeth that can give quite a nasty bite, but their claws and tails are their primary defence.
A bipedal prosauropods stats could be used to represent a fairly generic bipedal herbivorous dinosaur, such as a Hypsilophodon, although such animals were probably a little faster and did not have as large claws.
Small Prosauropod (Thecodontosaurus)
Late Triassic (225-200 MYA)
Small Animal
Hit Dice: 1d8+2 (6 hp)
Initiative: +0
Speed: 40 ft. (8 squares)
Armor Class: 16 (+1 size, +1 Dex, +4 natural), touch 12, flat-footed 15
Base Attack/Grapple: +0/+0
Attack: Tail-slap +0 melee (1d6) or claw +0 melee (1d4)
Full Attack: Tail-slap +0 melee (1d6); or claws +0 melee (1d4) and bite –5 melee (1d3)
Space/Reach: 5 ft./5 ft.
Special Attacks: —
Special Qualities: Low-light vision, scent
Saves: Fort +4, Ref +3, Will +1
Abilities: Str 11, Dex 12, Con 15, Int 1, Wis 12, Cha 4
Skills: Listen +5, Spot +5
Feats: Alertness
Environment: Temperate and warm plains or forests
Organization: Solitary, pair, family (3-12) or herd (10–60)
Challenge Rating: ¼
Treasure: None
Alignment: Always neutral
Advancement: 2 (Small); 3-6 (Medium); 7-13 HD (Large); 14-21 (Huge)
Level Adjustment: —
The smallest bipedal prosauropods include the oldest and most primitive examples of their kind, such as Panphagia.
A Small-sized bipedal prosauropod is roughly 5 feet long from nose to tail and weighs around 20-30 pounds.
Little Prosauropod (Unaysaurus)
Late Triassic (225-200 MYA)
Small Animal
Hit Dice: 2d8+4 (13 hp)
Initiative: +0
Speed: 40 ft. (8 squares)
Armor Class: 16 (+1 size, +1 Dex, +4 natural), touch 12, flat-footed 15
Base Attack/Grapple: +0/+0
Attack: Tail-slap +0 melee (1d6+1) or claws +0 melee (1d4+1)
Full Attack: Tail-slap +0 melee (1d6+1); or claws +0 melee (1d4+1) and bite –5 melee (1d3)
Space/Reach: 5 ft./5 ft.
Special Attacks: —
Special Qualities: Low-light vision, scent
Saves: Fort +5, Ref +4, Will +1
Abilities: Str 13, Dex 12, Con 15, Int 1, Wis 12, Cha 4
Skills: Listen +6, Spot +5
Feats: Alertness
Environment: Temperate and warm plains or forests
Organization: Solitary, pair, family (3-12) or herd (10–60)
Challenge Rating: ¼
Treasure: None
Alignment: Always neutral
Advancement: 3-6 (Medium); 7-13 HD (Large); 14-21 (Huge)
Level Adjustment: —
A little bipedal prosauropod roughly 7 feet long from nose to tail and weighing around 50-60 pounds.
Medium Prosauropod (Coloradisaurus?)
Late Triassic (220-210 MYA)
Medium Animal
Hit Dice: 3d8+9 (22 hp)
Initiative: +0
Speed: 40 ft. (8 squares)
Armor Class: 15 (+0 Dex, +5 natural), touch 10, flat-footed 15
Base Attack/Grapple: +2/+4
Attack: Tail-slap +4 melee (1d8+3) or claws +5 melee (1d6+2)
Full Attack: Tail-slap +4 melee (1d8+3); or claws +5 melee (1d6+2) and bite –1 melee (1d4+1)
Space/Reach: 5 ft./5 ft.
Special Attacks: —
Special Qualities: Low-light vision, scent
Saves: Fort +6, Ref +3, Will +2
Abilities: Str 15, Dex 10, Con 17, Int 1, Wis 12, Cha 4
Skills: Listen +6, Spot +6
Feats: Alertness, Weapon Focus (claw)
Environment: Temperate and warm plains or forests
Organization: Solitary, pair, family (3-12) or herd (10–60)
Challenge Rating: 1
Treasure: None
Alignment: Always neutral
Advancement: 4-6 (Medium); 7-13 HD (Large); 14-21 (Huge)
Level Adjustment: —
A Medium-sized bipedal prosauropod is roughly 10 feet long from nose to tail and weighs around 180-250 pounds.
Large Prosauropod (Massospondylus)
Late Triassic to Early Jurassic (210-185 MYA)
Large Animal
Hit Dice: 7d8+28 (59 hp)
Initiative: +0
Speed: 40 ft. (8 squares)
Armor Class: 15 (-1 size, +0 Dex, +6 natural), touch 9, flat-footed 15
Base Attack/Grapple: +5/+13
Attack: Tail-slap +8 melee (2d6+6) or claws +9 melee (1d10+4)
Full Attack: Tail-slap +8 melee (2d6+6); or claws +9 melee (1d10+4) and bite +3 melee (1d6+2)
Space/Reach: 10 ft./5 ft. (10 ft. with tail)
Special Attacks: Trample 2d6+6 [DC17]
Special Qualities: Low-light vision, scent
Saves: Fort +9, Ref +5, Will +3
Abilities: Str 19, Dex 10, Con 19, Int 1, Wis 12, Cha 4
Skills: Listen +8, Spot +8
Feats: Alertness, Endurance, Weapon Focus (claws)
Environment: Temperate and warm plains or forests
Organization: Solitary, pair, family (3-12) or herd (10–60)
Challenge Rating: 3
Treasure: None
Alignment: Always neutral
Advancement: 8-13 HD (Large); 14-21 (Huge)
Level Adjustment: —
A Large-sized bipedal prosauropod is roughly 14 feet long from nose to tail and weighs around 500-700 pounds.
Big Prosauropod (Plateosaurus)
Late Triassic (215-200 MYA)
Large Animal
Hit Dice: 10d8+50 (95 hp)
Initiative: +0
Speed: 40 ft. (8 squares)
Armor Class: 16 (-1 size, +0 Dex, +7 natural), touch 9, flat-footed 16
Base Attack/Grapple: +7/+17
Attack: Tail-slap +12 melee (2d6+9) or claws +13 melee (1d10+6)
Full Attack: Tail-slap +12 melee (2d6+9); or claws +13 melee (1d10+6) and bite +7 melee (1d6+3)
Space/Reach: 10 ft./5 ft. (15 ft. with tail)
Special Attacks: Trample 2d6+9 [DC21]
Special Qualities: Low-light vision, scent
Saves: Fort +12, Ref +7, Will +4
Abilities: Str 23, Dex 10, Con 21, Int 1, Wis 12, Cha 4
Skills: Listen +10, Spot +9
Feats: Alertness, Diehard, Endurance, Weapon Focus (claws)
Environment: Temperate and warm plains or forests
Organization: Solitary, pair, family (3-12) or herd (10–60)
Challenge Rating: 4
Treasure: None
Alignment: Always neutral
Advancement: 11-13 HD (Large); 14-21 (Huge)
Level Adjustment: —
The above stats are the largest size bipedal prosauropods commonly reached.
A big bipedal prosauropod is a Large-sized animal roughly 20 feet long from nose to tail and weighs around 1500-2000 pounds.
Huge Prosauropod (Yunnanosaurus)
Early to Middle Jurassic (215-200 MYA)
Huge Animal
Hit Dice: 14d8+84 (147 hp)
Initiative: +0
Speed: 40 ft. (8 squares)
Armor Class: 17 (-2 size, +0 Dex, +9 natural), touch 8, flat-footed 17
Base Attack/Grapple: +10/+26
Attack: Tail-slap +16 melee (3d6+12) or claws +17 melee (2d8+8)
Full Attack: Tail-slap +16 melee (3d6+12); or claws +17 melee (2d8+8) and bite +11 melee (1d8+4)
Space/Reach: 15 ft./10 ft. (20 ft. with tail)
Special Attacks: Trample 3d6+12 [DC27]
Special Qualities: Low-light vision, scent
Saves: Fort +15, Ref +9, Will +5
Abilities: Str 27, Dex 10, Con 23, Int 1, Wis 12, Cha 4
Skills: Listen +12, Spot +11
Feats: Ability Focus (trample), Alertness, Diehard, Endurance, Weapon Focus (claws)
Environment: Temperate and warm plains or forests
Organization: Solitary, pair, family (3-12) or herd (10–60)
Challenge Rating: 6
Treasure: None
Alignment: Always neutral
Advancement: 15-21 (Huge)
Level Adjustment: —
This is an exceptional size for a bipedal prosauropod, such as a particularly big Plateosaurus or the largest species of Yunannosaurus. There's a distinct possibility some (or all) such animals were semi-quadrupedal, dropping on their front legs to graze but rearing up on their hind limbs to fight or run.
30 feet, 4000-7000 pounds, max about 40 feet and 6 tons?