part of part of anatomical cluster lower hypural set This class was sourced from an external ontology (teleost_anatomy). Its definitions, naming conventions and relationships may need to be checked for compatibility with uberon UBERON:2002068 Anatomical cluster including hypurals 1 and 2 that supports part of the ventral principal caudal lepidotrichia or rays and that separates from the dorsal hypural set through the hypural diastema. The lower hypural set articulates or fuses to ural centra 1 and 2 (polyural terminology) or ural centrum 1 (diural terminology) depending on the teleost subgroup. The lower hypural set is composed of unpaired median bones. lower hypurals caudal fin skeleton