| Phylum: Mollusca Class: Gastropoda Location: Near Sonoita Az. Age: Pennsylvanian/Permian Formation: Concha Limestone | ![]() |
| Phylum: Bryozoa Class: Stenolaemata Order: Fenestrata Bryozoa Location: Near Sonoita Az. Age: Permian Formation: Concha Limestone | ![]() |
| Phylum: Echinodermata Sea Urchin Spines Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla Limestone | ![]() |