ELECTRONIC SUPPLEMENTARY MATERIAL
PHYLOGENETIC ANALYSIS
In order to access the phylogenetic position Guarinisuchus munizi described here,
we performed a phylogenetic analysis using PAUP 4.0b10 for Microsoft Windows
(Swofford, 2000). The data matrix was modified from Jouve et al. (2005). The heuristic
search option was used and characters were given equal weight and treated unordered
(ACCTRAN setting). The search conducted by PAUP including all taxa produced nine
equally parsimonious trees with a length of 54 steps. The consensus tree showed little
resolution with Chenanisuchus lateroculi as the sister group to all other dyrosaurids and
Sokotosuchus ianwilsoni + Phosphatosaurus gavialoides forming a monophyletic entity.
When Congosaurus bequaerti (that lacks the posterior portion of the skull from which
several characters were obtained) was removed from the matrix, PAUP found two most
parsimonious trees (with 54 setps; consistency index excluding uninformative characters =
0.6667; retention index = 0.8118; rescaled consistency index = 0.5712). Those tree differ in
the position of Guarinisuchus munizi and Arambourgisuchus khouribgaensis as a sister taxa
to Rhabdognathus keiniensis + Rhabdognathus aslerensis . The topology of the consensus
tree is shown in Fig. 3.
Swofford, D. L. PAUP: Phylogenetic Analysis Using Parsimony, Version 4.0B10 (for
Microsoft Windows) (Sinauer Associates, Inc. Sunderland, Massachusetts, 2000).
CHARACTER LIST
1. Supratemporal fenestra anteroposteriorly short (0) or strongly elongated with
width/length equal or greater (1) or smaller (2) than 0.4.
2. Posterior wall of supratemporal fenestra almost vertical, and almost not visible in dorsal
view (0) or dorsally inclined, largely exposed in dorsal view (1).
3. Lateral margin of the supratemporal fenestra well ornamented (0) or not (1).
4. Bony bar separating upper temporal fenestrae wide (0), narrow (1) or forming a sagittal
crest (2).
5. Bony bar separating upper temporal fenestrae ornamented (0) or not (1).
6. Premaxillae strongly differentiated from lateral margin of maxilla (0) or slightly or not
differentiated (1).
7. Lacrimal−nasal contact twice longer (0) or about equal (1) to the prefrontal−nasal
contact.
8. Anterolateral postorbital process absent or small (0) or contact the dorsal margin of jugal
(1).
9. Quadratojugal does not participate (0) or participates largely (1) to the cranial condyle
for articulation with the jaw.
10. Interorbital space wide (0) or narrow (1).
11. Parietal strongly dorsally ornamented with deep pits (0), or smooth (1), or slightly
ornamented (2).
12. Posterior margin of skull roof formed by the parietal straight (0), tapering posteriorly
(1), concave (2), "V" shaped (3) or displaying a strong concavity (4).
13. Posterior margin of squamosal lateral to occipital tuberosity straight (0) or anteriorly
concave (1).
14. Occipital tuberosities absent (0), small (1) or strongly developed (2).
15. Occipital processes (tuberosities) absent (0), rounded (1) or dorsoventrally flat (2).
16. Exoccipital participates slightly (0) or largely (1) to the occipital condyle.
17. Ventral part of basioccipital vertical, largely visible in occipital view (0) or strongly
inclined, weakly visible in occipital view (1).
18. Palatine participates to the anterior margin or not (0) or only to the anteromedial margin
(1) of the choanae.
19. Anteriormost point of the posterior margin of the pterygoid wing about at the level (0)
or far anterior (1) to the medial eustachian foramen.
20. Basisphenoid rostrum short (0) or extremely long anteriorly (1).
Lower Jaw
21. Symphysis wider than high (0) or about as wide as high (1).
22. External mandibular fenestra wide (0), absent or reduced to a thin slot (1).
23. Coronoid present (0) or absent (1).
24. Retroarticular process short (0) or extremely long and posterodorsally curved (1).
25. Posteromedial wing of the retroarticular process dorsally situated or at mid height (0) or
ventral (1) on the retroarticular process.
Teeth
26. Robust teeth with very wide alveoli (0) or thin and long teeth (1).
27. Variation in maxillary tooth size (0) or homodonty in size (1).
28. 5 (0) or 4 (1) premaxillary teeth.
29. Seventh mandibular tooth about as large as the other dentary teeth (0) or smaller (1).
30. Anterior carina of tooth dorsoventrally straight (0) or strongly medially “twisted” (1).
Data Matrix
Eutretauranosuchus
00000 ?1001 00000 0000? 00000 00?00
Elosuchus
00000 0?000 00000 00110 00?0? 00000
Sarcosuchus
00000 00000 00000 00000 01000 00000
Terminonaris robusta
00000 11000 00000 0001? 01??0 11000
Chenanisuchus lateroculi
10000 10010 00011 10??? 1??11 111?0
Sokotosuchus ianwilsoni
10011 0?0?1 00011 ?0??? ????? 001??
Phosphatosaurus gavialoides
1??11 0???1 000?? ?01?? ????? 001?0
Dyrosaurus phosphaticus
10010 10111 00021 10101 11?1? 11110
Hyposaurus rogersii
11011 1?111 24022 1110? 00111 11111
Arambourgisuchus khouribgaensis
11021 11111 11122 1011? 0???? 11110
Rhabdognathus aslerensis
21121 ?0111 20121 11111 1???? 1???0
Rhabdognathus keiniensis
21121 ??111 23121 11??? 1???? 11???
Guarinisuchus munizi
21021 11111 22121 111?? 0???? 11110
Congosaurus bequaerti
????? 11??1 ????? ????? 11111 11110