Mesozoic Paleobiogeographic Patterns




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Mesozoic Paleobiogeographic Patterns
In much of the Mesozoic there were two major continents with some partial on and off connections.

In the early Mesozoic the wide spread Lystrosaura fauna of the early Triassic was found in (modern) Karoo Africa, Panchet India Sinkiang China & Fremont Antarctica.

(Was China part of Gondwanaland)?

http://www.mathematical.com/dinolystrosaur.html

http://epsc.wustl.edu/pic_sirius.htm
On addition the slightly younger Cynognathus fauna occurred in South America, India, Africa & China

http://www.geocities.com/CapeCanaveral/Hall/1636/synapsida/therapsida.html



http://www.peabody.yale.edu/mural/triassic/Text.html
The Jurassic is relatively poorly known
In the Cretaceous Asia, Europe, North America were connected

Gondwana consisted of Africa, S. America, India, Australia & Antarctica


Maybe some connection between Africa and Eurasia

And perhaps some connection between N & S America but separating at this time


In the Cretaceous the major orders of reptiles were:

http://www.pressroom.com/~cromag/PALEOTERMS.htm


Crocodilia

http://www.embl-heidelberg.de/~uetz/families/Crocodylidae.html
Saurischia "Lizard-hipped"

 http://www.ucmp.berkeley.edu/diapsids/saurischia/saurischia.html


Ornithishia "Bird-hipped"

http://www.ucmp.berkeley.edu/diapsids/ornithischia/ornithischia.html


Cerotopsids

http://www.ngdc.noaa.gov/mgg/sepm/palaios/9804/brinkman.HTML


Stegosaurs

http://palaeo.gly.bris.ac.uk/dinobase/picturesJR/Kentrosaurus.gif

http://www.monsters4u2.com/dinosaurs/stego.shtml


Pterosaurs

Flying reptiles

http://www.ucmp.berkeley.edu/diapsids/pterosauria.html
Chelonia

Turtles


 http://mitglied.lycos.de/kordikova/origin_of_chelonians.htm

Squamata


Lizards & Snakes
Choristodera

Champosaurus

http://home.houston.rr.com/vnotes/notes/Champsosauridae.html


3 orders of Mesozoic reptiles probably originated in Gondwana

3 probably originated in Laurasia

http://www.kheper.auz.com/gaia/Mesozoic/Mesozoic.htm

HOME101
FW fishes



Gondwana Laurasia


Lepidosiren Polydontidae

Osteoglossans Amiidae http://www.cnr.vt.edu/efish/families/amiidae.html

Characidsa Acipenseridae

Cichlids Percids

Centracharids
The Cenozoic was about as long as the Mesozoic but higher diversity
http://search.netscape.com/search.psp?cp=nrpkwphoptop&search=Centracharids&x=28&y=13&pagecp=srp
http://gwis2.circ.gwu.edu/~atkins/newwebpages/Mammalia/extinct/extinctmammals.html
Laurasia Gondwana

Insectivora Edentata

Chiroptera Notoungulata

Primates Paucituberculata

Carnivora Pyrotheres

Perissodactyla Litopterna

Artyodactylidae Astrapotheria

Rodentia

Lagomorpha

Pholidota


Six orders of mammals originated in S America maybe 9in Laurasia


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