• Print

Author Topic: [11/16/10] Oldest Dinosaur Embryos Show "Big Surprises"  (Read 1177 times)

Offline Loki

  • Fossil
  • *****
  • Posts: 1843
[11/16/10] Oldest Dinosaur Embryos Show "Big Surprises"
« on: November 16, 2010, 08:34:22 PM »
Oldest Dinosaur Embryos Show "Big Surprises"

Quote
The sharpest look yet at the oldest known dinosaur embryos (pictured, one of the eggs and its inhabitant) has revealed some "big surprises," a scientist says.

For one thing, the 190-million-year-old babies of Massospondylus—a two-legged dinosaur that preceded the well-known sauropods, such as Diplodocus—do not resemble their parents, according to study co-author Hans-Dieter Sues, a paleontologist at the National Museum of Natural History in Washington, D.C. (See more dinosaur-embryo pictures.)

The 8-inch-long (20-centimeter-long) youngster, for example, had long front legs for walking on all fours, and its overall body proportion—such as a short snout—made it "look like a dwarf version of a sauropod dinosaur," the largest animals to walk Earth. (See a sauropod picture.) The babies would have lost these traits as they matured.

The discovery suggests Massospondylus had characteristics that "foreshadowed" the later look of the sauropods, he said. (See "New Strong-Handed Dinosaur May Shatter Assumptions.")

http://news.nationalgeographic.com/news/2010/11/photogalleries/101116-oldest-dinosaur-embryos-eggs-science-photos-pictures/


Click on the image thumbnails at the top of the article to read more information!

Offline Ferahgo

  • Administrator
  • Fossil
  • *****
  • Posts: 1766
  • SCIENCE NEEDS ME!
    • Emily Willoughby Art
Re: [11/16/10] Oldest Dinosaur Embryos Show "Big Surprises"
« Reply #1 on: November 16, 2010, 10:08:12 PM »
Quote from: article
The discovery suggests Massospondylus had characteristics that "foreshadowed" the later look of the sauropods, he said.


This line irks me in that it's really getting the whole thing backwards. "Ontogeny recapitulates phylogeny," so this discovery should say more about the ancestors of Massospondylus (which, big surprise, walked on four legs) than its eventual descendants. How can ontogeny foreshadow anything?
"Hands are levers of influence on the world that make intelligence worth having." - Steven Pinker

Offline Anasikawin

  • Egg
  • *
  • Posts: 2
Re: [11/16/10] Oldest Dinosaur Embryos Show "Big Surprises"
« Reply #2 on: November 29, 2017, 04:03:42 AM »
I'm looking forward to it.

  • Print