Link:INB Home|INB English| INB русский язык|INB العربية|INB Türkiye|INB فارسی|INB Español|INB Français|INB Português|INB Deutsch|INB 國語|INB 中文|INB 日本语|INB 한국어|INB ภาษาไทย|INB tiếng Việt||Dinosaurs Jurassic Fossils Reveal Headbutts May Have Been Used as a Dinosaur Courtship Behavior
INB English forum
Welcome to (Industry & Native boffin) The industrial age here is full of fighting spirit, you and I both through this network space with Native biological spirit boffin came to the mad labs. home INBforum.com, come and join us Permanent name: inb-english.forumotion.com
INB English forum

Welcome to (Industry & Native boffin) The industrial age here is full of fighting spirit, you and I both through this network space with Native biological spirit boffin came to the mad labs. home INBforum.com, Permanent name: inb-english.forumotion.com


You are not connected. Please login or register

《《《《《《《上一页INBforum   Go down

上一页INBforum》》》》》》》View previous topic View next topic Go down  Message [Page 1 of 1]

1 Dinosaurs Jurassic Fossils Reveal Headbutts May Have Been Used as a Dinosaur Courtship Behavior on Sat Oct 11, 2014 9:49 pm

Admin


Admin

Pachycephalosaurids could attack each other with their dome-shaped skulls in a variety of ways. Image: Ryan Steiskal
Pachycephalosaurids had domed heads with thick, bony protuberances, which paleontologists hypothesized the dinosaurs used in courtship behavior, perhaps to determine which male would be allowed to mate. A new study indicates that these dinosaurs might have been bashing themselves in a number of different ways.
The scientists presented their findings at the Society of Vertebrate Paleontology’s annual meeting in Raleigh, North Carolina. Initially, paleontologists were looking at the dome of a Pachycephalosaurus wyomingensisfossil, and noticed lesions that appeared to stem from injuries. They looked at 102 domes from fossil collections around the world. Of those, 23 had lesions. They produced a 3D model of  P. wyomingensis‘ skull and mapped the injuries.

Pachycephalosaurus wyomingensis skeleton, image by David Tana
The shape of the dome differed from fossil to fossil, and the placement of the injuries depended on the shape of the skull. Some skulls had injuries to the front, while others had injuries distributed between the front and back. This implied that P. wyomingensis with differently shaped skulls were bumping their heads in different ways.
These lesions were similar to those often seen in modern mammals. Bighorn sheep (Ovis canadensis) charge each other head on. Mountain goats (Oreamos americanus) bump each other in the flanks and bison (Bison bison) wrestle each other with their horns. Based upon these modern-day examples, the scientists speculated that the high-domed P. wyomingensis with parietal injuries were side-bumping like mountain goats, and the frontal injuries indicate bison-like wrestling.
This could be due to different species bashing in different ways, or a single species where juvenile and adults exhibit different behavior. There still is skepticism whether the lesions are impressions of head-butting. The skulls could have been chipped after death. A look at the skull bone microstructure will determine if the lesion sites suffered trauma.
[via Nature]]

View user profile http://eng.inbforum.com

上一页INBforum   Go down

上一页INBforumView previous topic View next topic Back to top  Message [Page 1 of 1]

Permissions in this forum:
You cannot reply to topics in this forum

Copyright ©2009-2016 LTD Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.

IT:SINGLESERVGoogle谷歌翻译TranslateFORUMSOFTLAYERGoogle谷歌广告联盟AdSenseAsia

 

Free forum | © PunBB | Free forum support | Contact | Report an abuse | Free forum