Re: My Phylogeny: Now Accelerating Comes Science

["Jaime A. Headden" <qilongia@yahoo.com>]

David Marjanovic (david.marjanovic@gmx.at) wrote:

... edited ...

1. Pubic apron more than one-third the length of the pubis (0), shorter or 
absent (1)
2. Obturator process on ischium present (0), absent (1)
3. Ischial symphysis present (0), absent (1)
4. Extra exit for V1 nerve absent (0), present (1)
5. Arctometatarsus: absent (0), sub (1), normal (2) or hyper (3) (ord)
6. Tail : femur ratio over (0), under (1) 3.5
7. over 40 (0), 25 -- 39 (1), 24 or less (2) caudal vertebrae
8. Pygostyle absent (0), present (1)
9. Quadrate single-(0), double-headed (1)
10. Antitrochanter absent (0), present (1)
11. Trochanteric crest divided (0), undivided (1)
12. Ratio of height of neural canal in dorsal vertebrae to height of cranial 
articular face less
    (0), more (1) than 0.40
13. Leg length : tail length ratio under 0.45 (0), in between (1), above 0.8 (2)
14. Tail stiffened distally (0), distally and in the middle, but mobile at the 
base (1), mobile
    throughout its length (save a pygostyle) (2)
15. 5 or less (0), 6 or more (1) sacral vertebrae
16. Caudal pneumatization absent (0), occurring (1)
17. 2 or no ridges on the nasals and broad snout (0), 1 central ridge and 
narrow snout (1)
18. Small pointed interdental plates (0) absent, fused (1) present, (2) no 
interdental plates
19. Furcula V-shaped, rami relatively strait (0), U-shaped (1)
20. Inflated parasphenoid capsule absent (0), present (1)
21! Inflated basisphenoid, pneumatically excavated internally: absent (0); 
present (1)
22. Contact between jugals and postorbitals present (0), absent (1)
23. Ascending process of jugal present (0), absent (1)
24!. Sickle-claw on second pedal does, hyper extendable: absent (0); present (1)

  I personally feel you need to work on how your characters are phrased. I've 
added a character
that clarifies information on what the parasphenoid capsule is in 
ornithomimosaurs and
troodontids; they are not the same thing, exactly, and the inflated 
basisphenoid, shared by both,m
is a more broadly-expressed feature that is related. The addition of the 
sickle-claw character may
also be of use. Look at features that consider various relationships. This 
matrix appears to be
focused on finding bird outgroups, but one might want to get general in light 
of troodontids, etc.
To remove polymorphisms, split the taxa. You can probably use *Pelecanimimus*, 
*Garudimimus*, and
Ornithomimidae as separate otu's, and one might want to code *Beipiaosaurus* 
separately from
Therizinosauroidea. I also added a state to the interdental plate character, 
qualifying the
absence of these in some birds, *Avimimus*, oviraptorosaurs, ornithomimosaurs 
(unknown in
*Pelecanimimus*), and troodontids. The proper conditions for the plates are 
"present and separate
(0); fused to one another (1); absent entirely (2)" -- this should not be coded 
as ordered.
*Avimimus* and Alvarezsauria share the "hyper" arctometatarsus, where the third 
mt is completely
contained within the midshaft of the cannon, between mt's II and IV, as in 
*Parvicursor*;
*Patagonykus* is described as having a broad mtIII, but it has been my feeling 
based on the
proximal morphology of this element that this is not mtIII at all, but 
conjoined mt's II and III.
The coding was altered to affect this. You left out a coding for 
dromaeosaurids, I added it back
in. I also added and coded *Microraptor* for you. As of right now, I have over 
300 characters
coding for relationships among and outgroups to oviraptorosaurs. Your matrix is 
broader in
perspective, so you may wish to sit down and think abotu these a little. There 
is a lot of
micro-variation within fossils, and many of these features may be related. 
*Avimimus* is unknown
in regards to the temporal bones, as they are broken and have eroded tips, and 
the jugal is not
complete, so this was indicted with a "-" to indicate missing data. All 
worrisome and uncoded
characters (I need to check up on them) are "?".

------

Compsognathidae         000-0 000-0 00000 00--0 0000
*Bagaraatan*            1---- -1--0 1-00- 0---- ----
Tyrannosauroidea        00012 01001 00100 01000 1000
Ornithomimosauria       00012 01001 00101 01--1 1000
Troodontidae            00012 01000 10111 00201 1001
Segnosauria             00010 11-11 00221 10100 1000
Oviraptoridae           00110 11011 00221 10200 1000
Caenagnathidae          00112 110-1 00221 102-0 -000
*Caudipteryx*           00?11 12011 00220 00200 -000
*Nomingia*              000-- 121-1 00221 1---- ----
Dromaeosauridae         00100 01011 (01)0010 01000 0001
*Bambiraptor*           000-1 0100? 00-1- 00010 --01
*Sinornithosaurus*      000-1 01001 00110 00010 0-01
*Archaeopteryx*         00001 02000 00210 00-00 0-00
*Rahonavis*             101-0 0-0-1 11111 0---- ---1
*Microraptor*           1---2 01--- 00110 0020- ---1
*Avimimus*              100?3 ---?1 10--1 -02-0 0--0
Alvarezsauridae         111-3 11011 11220 101-0 0100
Yandangornis            ----1 12--- 1-2-- ----- ----
Pygostylia              11111 12111 11221 10(12)10 0(01)10

-----


=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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