| Entity | Brief Description |
|---|---|
| Article | Subtype of Literature Reference |
| Authority | A source for information found in the database |
| Book | Subtype of Literature Reference |
| Definition | Definition of Morphology |
| Geographic_Entity | Geographic Location |
| Geologic_Time_Unit | |
| Geometric_Locality | Set of 1 to 4 coordinates defining a geographic area |
| Higher_Taxon | Taxon of Rank SubGenus or Higher |
| Ilustration | Illustration of Morphology |
| Journal | |
| Literature_Reference | |
| Monograph | Subtype of Literature Reference |
| Morphology | Morphological Feature |
| Museum_Lot | |
| Named_Place | Geographic Location |
| Occ-St-A weak entity | Entity relating Occurances to Stratigraphy and Authority |
| Other | Subtype of Literature Reference |
| Person | |
| Publisher | |
| R-P weak entity | Entity Relating Literature References to Persons |
| Record_of_Occurance | Record of the occurance of a Species |
| Repository | A Museum |
| Sp-Occ-A weak entity | Entity Relating Species to Occurances and Authority |
| Species_Name | Name of Species or Subspecies |
| Stratigraphic_Entity | Stratigraphic Placement or Range |
| Time_Unit_Boundary | Upper or Lower bounds of Geologic Time Units |
| Type_Specimen | |
| Type_Taxon | Taxon designated as at Type of a Higher Taxon |
| Usage_of_Species_Name | Relationship between two Species Names |
24 May 1996