A new Bambusoideae (Poaceae: Bambusoideae: Bambuseae: Guaduinae) from the Ituzaingó Formation (Pliocene-Pleistocene), Entre Ríos, Argentina

► New bamboo fossil wood from the Plio-Pleistocene of Argentina ► The culm or aerial vegetative axis fossil has one node and one incomplete internode. ► Guadua morronei sp. nov. is woody with node and internode solid. ► Fossil bamboo revealed a great affinity with the extant Guadua paraguayana. ► This new record provides new information about the past of the bamboo group.