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 Introduction

LIST OF THE RICHARDS SPUR (FORT SILL)  TETRAPOD PALEOFAUNA

LEPOSPONDYLI

EUREPTILIA

SYNAPSIDA

PARAREPTILIA

DIADECTOMORPHA

ANTHRACOSAUROIDEA

TEMNOSPONDYLI

UNIDENTIFIED TETRAPODS

Stratigraphic chart of the lower Permian (partial)

Phylogenetic Relationships

 CAPTORHINUS AGUTI

Eureptilia- Captorhinidae

References

Captorhinus aguti is the more common fossils at Richards Spur site. The captorhinomorphs were once considered the most primitive amniotes and ancestors of synapsids and all the other reptiles. Now they are considered a group of amniotes closely related with diapsids

1) Captorhinus aguti: first skull (dorsal)

1/I) Captorhinus aguti: first skull (dorsal/anterior)

1/II) Captorhinus aguti: first skull (dorsal/posterior)

2) Captorhinus aguti:first skull (lateral)

2/I) Captorhinus aguti: first skull (lateral/anterior)

2/II) Captorhinus aguti: first skull (lateral/posterior)

3) Captorhinus aguti: first skull (ventral)

4) Captorhinus aguti: first skull (occiput)

5) Captorhinus aguti: second skull (occiput)

6) Captorhinus aguti: epipterygoid

6) Captorhinus aguti: snout

7) Captorhinus aguti: premaxilla

8) Captorhinus aguti: maxilla

9) Captorhinus aguti: lachrymal

10) Captorhinus aguti:  jugal

11) Captorhinus aguti: third skull: temporal region

12) Captorhinus aguti: isolate supraoccipital (posterior view)

13) Captorhinus aguti: isolate supraoccipital (anterior view)

14) Captorhinus aguti: isolate basioccipital (posterior view)

15) Captorhinus aguti: isolate basioccipital (ventral view)

16) Captorhinus aguti: isolate parasphenoid (ventral view)

17) Captorhinus aguti: isolate parasphenoid (dorsal view)

18) Captorhinus aguti: isolate stape

19) Captorhinus aguti: third skull: quadrate

20) Captorhinus aguti: pterygoid

21) Captorinus aguti: dentary

22) Captorhinus aguti: atlantal centrum (posterior view)

23) Captorhinus aguti: atlantal centrum ( anterior view)

24) Captorhinus aguti: atlantal centrum (lateral view)

25) Captorhinus aguti: dorsal vertebrae

26) Captorhinus aguti: first caudal vertebra

27) Captorhinus aguti: interclavicle

28) Captorhinus aguti: scapulocoracoid (lateral view)

29) Captorhinus aguti: scapulocoracoid (medial view)

30) Captorhinus aguti: pelvis (lateral view)

31) Captorhinus aguti: pelvis (medial view)

32) Captorhinus aguti: pelvis (ventral view)

33) Captorhinus aguti: limb

34) Captorhinus aguti: same limb (humerus proximal dorsal)

35) Captorhinus aguti: same limb (humerus distal dorsal)

36) Captorhinus aguti: humerus, radius, ulna

37) Captorhinus aguti: femur, tibia

38) Captorhinus aguti: articulate pes