Concept: Buff-necked Ibis
The parasitic quill mites of the family Syringophilidae (Acariformes: Prostigmata) are recorded on ibises and spoonbills (Pelecaniformes: Threskiornithidae) for the first time. Four new species of the genus Stibarokris Kethley, 1970 are described: 1) S. theristicus Skoracki, Zmudzinski & Unsoeld sp. nov. ex Theristicus caudatus (Boddaert, 1783) from Brazil, 2) S. geronticus Skoracki, Zmudzinski & Unsoeld sp. nov. ex Geronticus calvus (Boddaert, 1783) from South Africa, 3) S. brevisetosus Skoracki & Zmudzinski sp. nov. ex Plegadis falcinellus (L., 1766) from Turkey, and 4) S. plataleus Skoracki & Zmudzinski sp. nov. ex Platalea leucorodia L., 1758 from Austria. Additionally, a key to all described species in the genus is presented, and hypothesis of the Gondwanan origin of syringophilids associated with ibises and spoonbills is briefly discussed.