“Edmonton lizard”
Late Cretaceous, 73-66 million years ago

Edmontosaurus was a large, duck-billed hadrosaur. It grazed in herds, and could walk on two legs or four. Thanks to a very rare fossil of a mummified specimen, scientists know that it had scaly, reptilian skin, and that the digits on its forelimbs were enclosed in a “mitten” of flesh. This has helped inform reconstructions of other hadrosaurids, such as Corythosaurus and Parasaurolophus. The term “flesh-mitten” is now widely accepted in the scientific community to be “[…] really gross if you think about it long enough.” [citation needed]


Meet Joe the Baby Dinosaur
Probably the only baby dinosaur with its own website … including:

… and for even more detailed models, check out the original scientific paper, which has a full set of links to relevant files.

Skeleton of the baby Parasaurolophus nicknamed “Joe.”

Skeleton of Parasaurolophus sp. in left lateral view.
(A) interpretive drawing; (B) photograph. Bones are bounded by solid lines and colored orange; blue indicates areas of fragmented and powdered bone due to weathering, and green indicates bone impressions.

Comparison of the size of the baby Parasaurolophus (green) to adult Parasaurolophus, as well as an adult and baby human.

High school student discovers skeleton of baby dinosaur
PhysOrg Oct 22, 2013 

A chance find by a high school student led to the youngest, smallest and most complete fossil skeleton yet known from the iconic tube-crested dinosaur Parasaurolophus. The discovery, announced today by the Raymond M. Alf Museum of Paleontology at The Webb Schools, shows that the prehistoric plant-eater sprouted its strange headgear before it celebrated its first birthday. 

Continue reading at PhysOrg …

Read the journal article:  Andrew A. Farke et al:  Ontogeny in the tube-crested dinosaur Parasaurolophus (Hadrosauridae) and heterochrony in hadrosaurids

Animalia  >  Chordata  >  Sauropsida  >  Dinosauriformes  >  Dinosauria  >
Order: †Ornithischia
Family: †Hadrosauridae
Genus:  †Parasaurolophus

GRAPHICS: Scott Hartman, Matt Martyniuk, and Raymond M. Alf Museum of Paleontology  |  DOI: 10.7717/peerj.182/fig-3



Hasta el momento se cree que estos ejemplares de dinosaurios corresponderían al tipo de hadrosaurios, frecuentemente encontrados en el hemisferio norte,  y de iguanodóntia basales. Algo que explicaría también, por la lejanía de su hallazgo, la evolución de la flora y fauna entre el extremo de Sudamérica y la Antártica.

Sin embargo, este descubrimiento no llegó solo. El estudio sobre los dinosaurios más australes del mundo ocurrió gracias al desarrollo otra investigación chilena, basada en el hallazgo de 34 hojas de Nothofagus de la era de los dinosaurios, y que prueban el paso de esta especie desde la Antártica hasta Sudamérica.

Si bien estos fósiles, de 66 millones de años, pueden sonar extraños, comprenden varias especies que conocemos en Chile como robles, coihues, lengas, ñirres, raulíes, ruiles y hualos, pero presentes en un paisaje boscoso menos austral en la actualidad.