The pronephric duct collects the filtrate from the pronephric tubules and opens to the exterior of the pronephric kidney[GOC:mtg_kidney_jan10, PMID:15647339, XAO:0000063, ZFA:0000150]

The first-formed kidney duct, which drains the kidney of most anamniotes and becomes the ductus deferens of male amniotes. [Bemis_WE, Functional_Anatomy_of_the_Vertebrates:_An_Evolutionary_Perspective, Glossary_G-3, Grande_L, Liem_KF, Third_Edition_(2001)_Orlando_Fla.:_Harcourt_College_Publishers, Walker_WF][VHOG], Duct of the embryonic kidney, present bilaterally ventral to the somites and leading to the anal region where it empties separately from, and just posterior to the anus. Kimmel et al, 1995.[TAO]

uberon

ductus pronephricus, pronephric ducts, archinephric duct

(...) in all craniates, the archinephric duct develops in embryogeny.[well established][VHOG]

UBERON:0003060

• mesonephric duct