Gelastocoris is a genus of toad bugs in the family Gelastocoridae. There are more than 20 described species in Gelastocoris.

Species: These 23 species belong to the genus Gelastocoris:

• Gelastocoris amazonensis Melin, 1929
• Gelastocoris andinus Melin, 1929
• Gelastocoris apureensis Melin, 1929
• Gelastocoris barberi Torre-Bueno
• Gelastocoris bolivianus De Carlo, 1954
• Gelastocoris bufo (Herrich-Schäffer, 1840)
• Gelastocoris curiosus Poinar & Brown, 2016
• Gelastocoris decarloi Estévez & Schnack, 1977
• Gelastocoris flavus (Guérin-Méneville, 1835)
• Gelastocoris fuscus Martin, 1929
• Gelastocoris hungerfordi Melin, 1929
• Gelastocoris major Montandon, 1910
• Gelastocoris martinezi De Carlo, 1954
• Gelastocoris monrosi De Carlo, 1959
• Gelastocoris nebulosus (Guérin-Méneville, 1844)
• Gelastocoris oculatus (Fabricius, 1798) (big-eyed toad bug)
• Gelastocoris paraguayensis De Carlo, 1954
• Gelastocoris peruensis Melin, 1929
• Gelastocoris quadrimaculatus (Guérin-Méneville, 1844)
• Gelastocoris rotundatus Champion, 1901
• Gelastocoris vandamepompanoni Boulard & Jauffret, 1984
• Gelastocoris vicinus Champion, 1901
• Gelastocoris viridis Todd, 1955

Extinct species: 

• †Gelastocoris curiosus Poinar and Brown 2016 Burmese amber, Myanmar, Cenomanian