intercalar obsolete intercalar true UBERON:4000024 Small membrane bone homologous with a cartilage bone in more basal fishes (Patterson, 1977). Situated between the exoccipital and the pterotic at point of attachment of short ligament that originates on the ventral arm of the posttemporal. This class was sourced from an external ontology (vertebrate_skeletal_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon Term resides in TAO.