return to main index

  mobile - desktop
follow us on facebook follow us on twitter follow us on YouTube link to us on LinkedIn
 
click here for  Animal Specialties
Mealworms, Crickets, Dubia, More...
Available Now at New York Worms!
Locate a business by name: click to list your business
search the classifieds. buy an account
events by zip code list an event
Search the forums             Search in:
News & Events: Herp Photo of the Day: Frog . . . . . . . . . .  Herp Photo of the Day: Sand Boa . . . . . . . . . .  Reptilian Nation Expo Denver - Feb. 22-23, 2020 . . . . . . . . . .  ReptiCon Tampa - Feb. 22-23, 2020 . . . . . . . . . .  ReptiCon Jackson - Feb. 22-23, 2020 . . . . . . . . . .  ReptiCon Charlotte - Feb. 22-23, 2020 . . . . . . . . . .  ReptiCon Mobile - Feb. 29-Mar. 01, 202 . . . . . . . . . .  ReptiCon Houston - Feb. 29-Mar. 01, 202 . . . . . . . . . .  ReptiCon Greenville - Feb. 29-Mar. 01, 202 . . . . . . . . . .  Western Maryland Reptile Show - Mar. 07, 2020 . . . . . . . . . .  The Reptile Expo - Mar. 07, 2020 . . . . . . . . . .  Reptilian Nation Expo San Diego - Mar. 07-08, 2020 . . . . . . . . . . 

full banner - advertise here .50¢/1000 views
click here for Nature Zone
pool banner - $50 year

Origin of snakes

[ Login ] [ User Prefs ] [ Search Forums ] [ Back to Main Page ] [ Back to Taxonomy Discussion ] [ Reply To This Message ]
[ Register to Post ]

Posted by: CKing at Fri Oct 23 17:55:49 2009  [ Report Abuse ] [ Email Message ] [ Show All Posts by CKing ]  
   

Those who are interested in the origin of snakes may be interested in the following paper:

http://www.kingsnake.com/aho/pdf/menu3/rickshine/originofsnakes.pdf

This paper investigates eye anatomy and found that snake eyes share many characteristics with those of aquatic vertebrates, suggesting and corroborating earlier phyologenetic analyses and fossil data linking snakes with marine reptiles called mossasaurs. The oldest known snake fossils had legs, and they were marine animals. These snakes also had the macrostomatan condition. Therefore the microstomatan snakes likely evolved their fixed jaws and small gapes secondarily from a macrostomatan condition. Indeed, detailed investigations of different microstomatan snakes show that their jaws are highly speciliazed and differ markedly from those of lizards, and therefore supportively of derived, rather than primitive conditions. Snakes therefore appeared to have evolved in the marine environment and the blind and burrowing snakes evolved later from marine ancestors.


   

[ Reply To This Message ] [ Subscribe to this Thread ] [ Show Entire Thread ]


>> Next Message:  RE: Origin of snakes - bskinner88, Sat Nov 28 10:18:15 2009