Photos of Urchin Spines
| Phylum: Echinodermata Echinoid Debris Location: Near Sonoita Az. Age: Permian Formation:Colina Limestone High Resolution Image |  |
| Phylum: Echinodermata Echinoid Debris Location: Near Sonoita Az. Age: Permian Formation:Colina Limestone High Resolution Image |  |
| Phylum: Echinodermata Echinoid Spine Location: Near Sonoita Az. Age: Permian Formation:Colina Limestone High Resolution Image |  |
| Phylum: Echinodermata Echinoid Spine Location: Near Sonoita Az. Age: Permian Formation:Colina Limestone High Resolution Image |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spine Location: Near Vail AZ. Age: Permian Formation: Concha Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spine Location: Near Vail AZ. Age: Permian Formation: Concha Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin SpineLocation: Near Vail AZ. Age: Permian Formation: Concha Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin SpineLocation: Near Vail AZ. Age: Permian Formation: Concha Limestone |  |
| Phylum: Echinodermata Sea Urchin Spine Location: Near Sonoita Az. Age: Permian Formation: Concha Limestone |  |
| Phylum: Echinodermata Sea Urchin Spines Location: Near Sonoita Az. Age: Pennsylvanian/Permian Formation: Horquilla Limestone |  |
| Phylum: Echinodermata Sea Urchin Plate and Spines Location: Near Sonoita Az. Age: Pennsylvanian/Permian Formation: Horquilla Limestone |  |
| Phylum: Echinodermata Echinoid Spine Outer Covering Preserved Magnified View Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Echinoid Spine Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Echinoid Spine Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Echinoid Spine through Plate Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Echinoid Spine Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spines Location: Near Sonoita Az. Age: Permian Formation: Colina limestone In places, this formation appears to made of Sea Urchin Spines |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spines Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spine Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Large Urchin Spine Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spine with numerous tubercles Location: Near Sonoita Az. Age: Pennsylvanian/Permian? Formation: Unknown |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spines Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spines Location: Near Sonoita Az. Age: Permian Formation: Colina Limestone |  |
| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Echinoid Plate Location: Tucson Mountains Age: Mid to late Permian Formation: Rain Valley |
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| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spines Location: Tucson Mountains Age: Mid to late Permian Formation: Rain Valley |
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| Phylum: Echinodermata Subphylum: Echinozoa Class: Echinoidea Sea Urchin Spines Location: Tucson Mountains Age: Mid to late Permian Formation: Rain Valley |
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