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