topDefinedBy
P91715
predicate
Indicates that the highest or most general level of a structure, hierarchy, or classification is specified or determined by a particular defining source or element.
All labels observed (1)
| Label | Occurrences |
|---|---|
| topDefinedBy canonical | 2 |
Sample triples (2)
| Subject | Object |
|---|---|
| Toarcian | first appearance of ammonite Leioceras opalinum ⓘ |
| Middle Jurassic | first appearance of the ammonite genus Kepplerites ⓘ |