World Register of Marine Species (WoRMS)
Walter, T.C.; Boxshall, G. (2026). World of Copepods Database. Pachycyclops annulicornis (Koch, 1838). Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=365107 on 2026-08-30
Koch, C.L. (1838). Deutschlands Crustaceen, Myriapoden und Arachniden. [Germany's crustaceans, myriapods and arachnids.]. In: Herrick-Schäffer, G.A.W. (ed.). Ein Beitrag zur Deutschen Fauna, 1835-1844. Issued as loose leaves for each species with plates. Heft 21 & Heft 35. Regensburg. Heft 21:1-12. (ix.1838).