Vertebrate Taxonomy Ontology (VTO)

Ontology Info

Field	Value
Acronyme	VTO
Description	The Vertebrate Taxonomy Ontology includes both extinct and extant vertebrates, aiming to provide one comprehensive hierarchy. The hierarchy backbone for extant taxa is based on the NCBI taxonomy. Since the NCBI taxonomy only includes species associated with archived genetic data, to complement this, we also incorporate taxonomic information across the vertebrates from the Paleobiology Database (PaleoDB). The Teleost Taxonomy Ontology (TTO) and AmphibiaWeb (AWeb) are incorporated to provide a more authoritative hierarchy and a richer set of names for specific taxonomic groups.
Format	OWL
Categories	Taxonomic Classification
Groups	OBO Foundry

Metric	Value
Classes	107,254
Individuals	0
Properties	0
Max Depth	38
Max Child Count	451
Average Child Count	4
Classes With One Child	10,711
Classes With More Than 25 Children	661
Classes With No Definition	107,145