Bunaia is a genus of synziphosurine, a paraphyletic group of fossil cheliceratearthropods.[1][2]Bunaia was tentatively placed as part of the cladePlanaterga.[1][3][2] The genus contains at least one species: Bunaia woodwardi from the Silurianperiod in Svalbard, Norway.[4][3] Only a few morphological information of B. woodwardi had been confirmed, as the species known only from poorly preserved specimens compose of semicircular carapace, fragments of opisthosoma and disarticulated telson.[4][5] The placement of "Bunaia" heintzi (known only by a single carapace from the Silurian period in the United States) within this genus had been questioned and required further investigation.[5]