osric

osric
FrequencyCommon
Number appearing1d3
Armor class6
Move150-ft swimming
Hit dice20
% in lairNil
Damage per attack5d4
Special attacksNone
Special defensesNone
Magic resistanceStandard
IntelligenceNon-
AlignmentNeutral
SizeLarge

None of these creatures are technically dinosaurs, though all are found in "Lost World" areas. Archelon was a kind of gigantic turtle.

Cretaceous carnivore.

Source: OSRIC. Attribution: Stuart Marshall, with Matthew J. Finch / Black Blade Publishing. License: OGL-1.0a.