Kasibelinurus (meaning "sibling of dart tail" for its perceived relation to Belinurus at the time) is a genus of xiphosuran from the Devonian.

[5] The type species and only species of Kasibelinurus is K. amicorum (derived from Latin word amicus meaning 'friend').

[6] The genus Kasibelinurus was described by Pickett as having "Ophthalmic ridges effaced; precardiac field defined by anterior prolongations of the cardiac furrows; opisthosomal pleurae with distinct inner and outer zones."

The same source later states that Kasibelinurus had a telson with restricted movement based on the shape of the opisthosoma.

Patesia - genus of horseshoe crabs formerly thought to be of Kasibelinurus Houia - genus of dekatriatan formerly thought to be part of Kasibelinurus