dinochecker
Welcome to our CRYPTOSAURUS entry...
Archived dinosaurs: 1221
fb twit g+ feed
Dinosaurs from A to Z
Click a letter to view...
A B C D E F G
H I J K L M N
O P Q R S T U
V W X Y Z ?

CRYPTOSAURUS

a questionable ankylosaurian dinosaur from the Late Jurassic of England.
Pronunciation: KRIP-to-SOR-us
Meaning: Hidden lizard
Author/s: Seeley (1869)
Synonyms: Cryptodraco (Lydekker, 1889)
First Discovery: Cambridgeshire, England
Discovery Chart Position: #28

Cryptosaurus eumerus

(Hidden Lizard with a Well-Formed Thigh)Etymology
Cryptosaurus is derived from the Greek "kryptos" (hidden) in reference to its rarity (Seeley: "the only example of a Dinosaurian genus from the Oxford Clay which has a general affinity with Iguanodon"), and the Greek "sauros" (lizard).
The species epithet, eumerus, means "well-formed thigh" in Greek, in reference to the stout build of the bone.
Discovery
The remains of Cryptosaurus were discovered in the Ampthill Clay Formation at Great Gransden brick pit, Cambridgeshire, England, by Lucas Ewbank.
The holotype (OUM J.46882) is a "one foot one inch femur".
Estimations
Timeline:
Era: Mesozoic
Epoch: Late Jurassic
Stage: Oxfordian
Age range: 163-158 mya
Stats:
Est. max. length: ?
Est. max. hip height: ?
Est. max. weight: ?
Diet: Herbivore
References
• Seeley HG (1869) "Index to the Fossil Remains of Aves, Ornithosauria, and Reptilia from the Secondary System of Strata, arranged in the Woodwardian Museum of the University of Cambridge". C.J. Clay, M.A. Cambridge University Press.
• Seeley HG (1875) "On the femur of Cryptosaurus eumerus, a dinosaur from the Oxford Clay of Great Gransden". Quarterly Journal of the Geological Society, 31: 149-151. DOI: 10.1144/GSL.JGS.1875.031.01-04.12.
• Lydekker R (1889) "On the Remains and Affinities of five Genera of Mesozoic Reptiles". Part III. Page 41-48—"Femur of an iguanodont dinosaur from the Oxford Clay near Peterborough". Quarterly Journal of the Geological Society. 45: 41-59. DOI: 10.1144/GSL.JGS.1889.045.01-04.04. [coins Cryptodraco.]
• Galton PM (1980) "Armored dinosaurs (Ornithischia: Ankylosauria)) from the Middle and Upper Jurassic of England". Geobios, 13(6): 825-837. DOI: 10.1016/S0016-6995(80)80038-6.
• Galton PM (1983) "Armored dinosaurs (Ornithischia: Ankylosauria) from the Middle and Upper Jurassic of Europe". Palaeontographica Abteilung A, 182(1-3): 1-25.
• Naish D and Martill DM (2008) "Dinosaurs of Great Britain and the role of the Geological Society of London in their discovery: Ornithischia". Journal of the Geological Society, 165 (3): 613-623.
Email    Facebook    Twitter    Reddit    Pinterest
Time stands still for no man, and research is ongoing. If you spot an error, or want to expand, edit or add a dinosaur, please use this form. Go here to contribute to our FAQ.
All dinos are GM free, and no herbivores were eaten during site construction!
To cite this page:
Atkinson, L. "CRYPTOSAURUS :: from DinoChecker's dinosaur archive".
›. Web access: 06th Mar 2026.
  top