Dr. Éva Murai szerk.: Miscellanea Zoologica Hungarica 4. 1987 (Budapest, 1987)

Stifter, P.: Ilyocryptus verrucosus Daday, 1905: a junior synonym of I. spinifer Herrick, 1882 (Crustacea: Cladocera)

Figs 1-4. Ilyocryptus spinifer Herrick, 1882, sexual female, Paraguay, Daday's collection (D III50; II/P-404) (1= antennule, 2= postabdomen, 3= distal segments of antennái exopod, 4= defensive posterior spines of carapace) Fig. 5 Ilyocryptus spinifer Herrick, 1882, sexual female, Trinidad (South), Waterloo Road, 23. 2. 1979, leg. T. Gopee, distal segments of antenna! exopod