Bucranium (spider)Bucranium is a genus of spiders in the family Thomisidae.Species, the World Spider Catalog accepted the following four extant species:Bucranium affine – MexicoBucranium pulchrum – CubaBucranium spinigerum O. Pickard-Cambridge, 1891 – GuatemalaBucranium taurifrons O. Pickard-Cambridge, 1881 – Venezuela, Guyana, Peru, Brazil, Paraguay