Atlantis Online
March 28, 2024, 02:19:45 pm
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Underwater caves off Yucatan yield three old skeletons—remains date to 11,000 B.C.
http://www.edgarcayce.org/am/11,000b.c.yucata.html
 
  Home Help Arcade Gallery Links Staff List Calendar Login Register  

Dinosaurs: Their Rise & Fall

Pages: 1 [2] 3 4 5 6 7 8 ... 25   Go Down
  Print  
Author Topic: Dinosaurs: Their Rise & Fall  (Read 9952 times)
0 Members and 116 Guests are viewing this topic.
Melody Stacker
Superhero Member
******
Posts: 4550



« Reply #15 on: June 04, 2009, 01:20:26 pm »

Earliest dinosaurs

The first known dinosaurs were bipedal predators that were one to two metres long.

Spondylosoma may or may not be a dinosaur, the fossils (all postcranial) are tentatively dated at 230-232 Ma.[1]

The earliest confirmed dinosaur fossils include the Saurischia Saturnalia 225-232 Ma, Herrerasaurus 220-230 Ma, Staurikosaurus possibly 225-230 Ma, Eoraptor 220-230 Ma and Alwalkeria 220-230 Ma. Saturnalia may be a basal saurischian or a prosauropod. The others are basal Saurischians.

The earliest Ornithischia includes Pisanosaurus 220-230 Ma. Although Lesothosaurus comes from 195-206 Ma, skeletal features suggest that it branched from the main Ornithischia line at least as early as Pisanosaurus.

Report Spam   Logged
Pages: 1 [2] 3 4 5 6 7 8 ... 25   Go Up
  Print  
 
Jump to:  

Powered by EzPortal
Bookmark this site! | Upgrade This Forum
SMF For Free - Create your own Forum
Powered by SMF | SMF © 2016, Simple Machines
Privacy Policy