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Re: Sauropod Phylogeny (was bird origins)



In a message dated 95-10-08 18:07:29 EDT, zooamy@zoo.latrobe.edu.au (Adam
Yates) writes:

>Could you please send some sort of summary of your view of their 
>phylogeny (particularly the Sauropoda)? To me it seems that convergence 
>is more rampant here than anywhere than anywhere else in the dinosaurs 
>(except perhaps modern aves), perhaps this due to having a limited number 
>of ways to build a truly gigantic body.Then again maybe its just that the 
>theropods have been grabbing the spotlight for too long!
>

Well, see how this prints (use a Courier font if possible):

PHYTODINOSAURIA (read chart down)
|
|    Melanorosauridae
|    |
|    |  Vulcanodontidae
|    |  |
|    |  |  Barapasauridae
|    |  |  |
|    |  |  |  Cetiosauridae
|    |  |  |  |
|    |  |  |  |  Andesauridae
|    |  |  |  |  |
|    |  |  |  +--+--Titanosauridae
|    |  |  |  |
|    |  |  |  |        Brachiosauridae
|    |  |  |  |        |
|    |  |  |  |        +--Chubutisauridae
|    |  |  |  |        |
|    |  |  |  |        |     Camarasauridae
|    |  |  |  |        |     |
|    |  |  |  |        |     |  Euhelopodidae
|    |  |  |  |        |     |  |
|    |  |  |  |        |     |  |  Diplodocidae
|    |  |  |  |        |     |  |  |
|    |  |  |  |        |     |  |  |  Dicraeosauridae
|    |  |  |  |        |     |  |  |  |
+----+--+--+--+--------+-----+--+--+--+--Nemegtosauridae
|    SAUROPODA
|
+-----Thecodontosauridae
|      
|         Anchisauridae
|         |
|         +---Massospondylidae
|         |    
|         |       Yunnanosauridae
|         |       |
|         |       |   Plateosauridae
|         |       |   |
+---------+-------+---+---Blikanasauridae
|         PROSAUROPODA
|
|     Alxasauridae
|     |
|     |   Segnosauridae
|     |   |
+-----+---+---Therizinosauridae
|     SEGNOSAURIA
|
|     Lesothosauridae
|     |LESOTHOSAURIA
+-----+---Nanosauridae
|ORNITHISCHIA
|
|     Scelidosauridae
|     |
|     |   Ankylosauridae
|     |   |
|     |   |   Polacanthidae
|     |   |   |
+-----+---+---+---Nodosauridae
|     ANKYLOSAURIA
|
|     Huayangosauridae
|     |
|     |   Dacentruridae
|     |   |
|     |   |   Kentrosauridae
|     |   |   |
+-----+---+---+---Stegosauridae
|     STEGOSAURIA
|
|     Heterodontosauridae
|     |
|     |   Homalocephalidae
|     |   |
|     |   +---Pachycephalosauridae
|     |   |
|     |   |
|     |   |-?-Stenopelicidae
|     |   |   |
|     |   |   |   Psittacosauridae
|     |   |   ?   |
|     |   |   |   |   Protoceratopidae
|     |   |   |   |   |
+-----+---+---+---+---+---Ceratopidae
|     ^       CERATOPIA
|     HETERODONTOSAURIA    
|
|     Thescelosauridae
|     |
|     +---Hypsilophodontidae (+ unnamed families)
|     |
|     |       Dryosauridae
|     |       |
|     |       |   Camptosauridae
|     |       |   |
|     |       |   |   Iguanodontidae
|     |       |   |   |
|     |       |   |   |   Hadrosauridae
|     |       |   |   |   |
+-----+-------+---+---+---+---Lambeosauridae
ORNITHOPODA

I am, of course, more than willing to discuss any aspects of this little
phylogeny as needed.

G.O.