part of part of tissue pineal body epiphysial cluster ZFA:0007004 ec 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 Early-developing neuronal cluster of the epiphysis. By 24 hpf the pioneer axon of the dorsoventral diencephalic tract (DVDT) has arisen from the ec and grown ventrally. As this axon encounters axons of the TPOC, it makes a near-90 rostral turn and grows rostrally among axons of the TPOC growing in the opposite direction. Ross et al., 1992. UBERON:2007004