Ilybiosoma is a genus of beetles in the family Dytiscidae, containing the following species:
Ilybiosoma amaroides (Sharp, 1882)Ilybiosoma bjorkmanae (Hatch, 1939)Ilybiosoma brevicolle (LeConte, 1857)Ilybiosoma cordatum (LeConte, 1853)Ilybiosoma discicolle (Ancey, 1882)Ilybiosoma flohrianum (Sharp, 1887)Ilybiosoma ilybiiforme (Zimmermann, 1928)Ilybiosoma kermanense (J.Balfour-Browne, 1939)Ilybiosoma lugens (LeConte, 1852)Ilybiosoma minnesotense (Wallis, 1933)Ilybiosoma oaxacaense (Larson, 2000)Ilybiosoma pandurum (Leech, 1942)Ilybiosoma perplexum (Sharp, 1882)Ilybiosoma regulare (LeConte, 1852)Ilybiosoma roguum (Larson, 1997)Ilybiosoma seriatum (Say, 1823)Ilybiosoma yeti Brancucci & Hendrich, 2006