Re: Geographic Distribution of Maniraptora

[ezequiel vera <ezequiel.vera@gmail.com>]

 Sorry... message truncated.... I was working with rich text....
Here is that I wanted to say...


  Maybe you can use Scotese's maps (www.scotese.com), as a source for drawing 
your own schematic maps using some vector drawing software (Open Office Draw, 
Corel Draw, Illustrator, etc.). Also, you can make combined works, using the 
image (maximized to the final size) and the vectorial drawing for the edges 
(you can smooth the image for hiding a little the pixels). Finally, you can 
search Scotese's site or Contact him for more info (he SURE has the hi-res maps)

About the distribution of Maniraptorans, you have a small discussions in:

Kim et al. (2005). The first non avian maniraptoran... Cretaceous Research 26: 
299-306 Case,  J.A., 

Martin, J.E. and Reguero, M. (2007) A dromaeosaur from the Maastrichtian of 
James Ross Island and the Late Cretaceous Antarctic dinosaur fauna. U.S. 
Geological Survey and The National Academies; USGS OF-2007-1047, Short Research 
Paper 083


Maybe you can also compare the distribution of Maniraptorans (Laurasian vs 
Gondwanic Unenlagiinae, as Unenlagia comahuensis and U.paynemilli, 
Neuquenraptor argentinus (U.paynemilli?), Buitreraptor, Unquillosaurus (?), 
Santanaraptor (some place it in Maniraptoriforms, altough others consider it an 
Abelisauroid Noasaurid, or even a Tyrannosauroid), Rahonavis, and the Brazilian 
Maniraptora) , considered by many authors as more primitive) taking into 
account the vicariance proposal, and compare with the distribution of 
Alvarezsaurid taxa (which also reveals that the South american taxa 
(Patagonykus, Alvarezsaurus, Achillesaurus, and a yet unpublished taxa) are 
more primitive than the Laurasian ones.

Hope this is useful for you!

Best wishes

Ezequiel
 
 
 
Lic. Ezequiel I. Vera 
 
Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" 
División Paleobotánica. Lab. 61. 
Av. Angel Gallardo 470. C1405DJR. 
Buenos Aires-Argentina 
E-mail: ezequiel.vera@gmail.com / evera@macn.gov.ar 
http://paleovera.googlepages.com (home page) 
http://www.flickr.com
ensaje original ---- 
De: Lonnie Allen Matson <lonniematson@paleobiologist.org> 
Para: dinosaur@usc.edu 
Enviado: viernes 15 de febrero de 2008, 4:11:36 
Asunto: Geographic Distribution of Maniraptora 
 
Greetings, 
 
This  is  my  very  first  post,  and  before  I  sent  it,  I  searched  the  
archives  extensively  to  make  certain  that  I  was  not  duplicating  a  
previous  thread  or  topic.  If  my  search  failed,  please  forgive  me.  
 
I  have  just  recently  been  approved  as  an  intern  in  the  Paleontology  
Lab  at  the  Dallas  Museum  of  Natural  History  (now  the  Nature  and  
Science  Museum).  As  well,  Dr.  David  Burnham  has  agreed  to  mentor  me, 
 and  assist  in  developing  a  project,  which  I  hope  will  become  my  
thesis,  for  Graduate  School. 
 
I  am  still  in  the  early  research  stages  as  of  yet,  but  what  I  
need  assistance  on  is  the  following.  Are  there  any  studies  available  
on  the  geographic  distribution  of  all  Maniraptorans,  not  just  the  
feathered  specimens?  I  just  recently  read  about  Buitreraptor,  and  the  
article  mentioned  the  possibility  of  two  very  distinct  groups,  one  
from  Gondwanaland,  the  other  from  Laurasia.  When  I  see  all  these  
proposed  phylogenetic  tree's  I  often  wonder  where  the  specimens  used  
for  the  study  are  from.  I  start  to  wonder  how  much  of  these  close  
relationships  are  attributable  to  convergence  between  the  two  different 
 groups. 
 
I  have  searched  long  and  hard,  and  as  of  yet,  had  no  luck  finding  
such  a  study.  Again,  I  may  have  overlooked  it. 
 
As  well,  are  there  any  good  maps  of  the  Triassic,  Jurassic  and  
Cretaceous  one  could  purchase?  I  want  to  pin  these  "raptors"  on  the  
map,  to  get  a  visual  sense  of  what  was  going  on  and  how  they  were 
 distributed.  I  would  need  them  large,  like  a  map  so  to  speak.  It  
would  be  used  for  a  presentation. 
 
I  truly  enjoy  reading  the  site,
chives,  and  I  hope  once  I  get  more  experience  in  the  field,  that  I 
 can  contribute  more  knowledgeably  to  other  discussions.  Any  assistance 
 would  be  appreciated,  and  I  thank  you  beforehand. 
 
sincerely, 
 
Lonnie  Allen  Matson 
University  of  North  Texas 
 
"Trilobites  and  dinosaurs,  who  were  each  around  for  more  than  a  
hundred  million  years,  might  be  amused  at  a  species  here  only  a  
thousandth  as  long  deciding  to  appoint  itself  the  guardian  of  life  
on  Earth.  That  species  is  itself  the  danger". 
 
----  Carl  Sagan 
 
 
 





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