Fossils from the Rillito River
| Phylum: Arthropoda Subphylum: Trilobita Trilobite Pygidium High Resolution Image Location: Rillito River Age: Unknown Formation: Unknown |  |
| Phylum: Echinodermata Echinoid Debris Location: Rillito River. Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Bryozoa Class: Stenolaemata Order: Fenestrata Bryozoa Location: Rillito River Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Brachiopoda Class: Articulata Brachiopod with Echinoid DebrisLocation: Rillito River. Age: Pennsylvanian/Permian? Formation: Earp? High Resolution Image |  |
| Phylum: Brachiopoda Class: Articulata Spiriferid Brachiopod Location: Rillito River. Age: Pennsylvanian/Permian? Formation: Earp? High Resolution Image |  |
| Phylum: Brachiopoda Class: Articulata Brachiopod with Echinoid DebrisLocation: Rillito River. Age: Pennsylvanian/Permian? Formation: Earp? High Resolution Image |  |
| Phylum: Brachiopoda Class: Articulata BrachiopodLocation: Rillito River. Age: Pennsylvanian/Permian? Formation: Earp? High Resolution Image |  |
| Phylum: Echinodermata Crinoid Sections Location: Rillito River. Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Echinodermata Crinoid Sections Location: Rillito River. Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Echinodermata Crinoid Sections Location: Rillito River. Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Bryozoa Branching Bryozoa in Cross-Section Location: Rillito River Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Echinodermata Echinoid Debris Location: Rillito River. Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Echinodermata Crinoid Stem Location: Rillito River. Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Bryozoa Branching Bryozoa Location: Rillito River Age: Paleozoic Formation: Unknown High Resolution Image |  |
| Phylum: Protozoa Order: Foraminiferida Suborder: Fusulinina Family: Fusulinidae Fusulinids Location: Rillito River Age: Pennsylvanian? Formation: Horquilla Limestone High Resolution Image |  |