Remarks on spp. (Apicomplexa: Eimeriidae) from spp. (Bovidae: Reduncini), with supplementary morphological data of Ricci-Bitti et al., 1973 from a new host subspecies, the common waterbuck (Ogilbyi, 1833).

Reduncin bovids of spp. (Bovidae: Reduncini) are natively distributed in sub-Saharan Africa, although some populations have been introduced into parks and zoos around the world. The majority of the species has declining populations, being categorized as threatened by the International Union for Conservation of Nature and Natural Resources; therefore, protective measures for the conservation of spp. are necessary, including the study of their parasites, such as the eimeriid coccidians (Apicomplexa: Eimeriidae). In this context, the aim of the current study was to brings together the taxonomic data from the descriptions and reports of spp. from reduncin bovids, based on the detailed morphological identification of Ricci-Bitti, Pampiglione & Kabala, 1973 from a new host subspecies, the common waterbuck (Ogilbyi, 1833), in a safari park of Portugal. Five spp. are recorded from reduncin bovids, in addition to six more reports identified generically as sp., which were compared and taxonomically rearranged. The oocysts identified as in the current study were compatible with the original description and were supplemented for some taxonomic characters not originally included, such as: Stieda body flattened to nipplelike, sub-Stieda body rounded to trapezoidal, sporocyst residuum granular and membrane-bound, in addition to greater details of the micropyle, among others. Finally, the current study highlights the importance of studying the coccidians of reduncin bovids for the conservation of spp. due to the possibility of these spp. are extra-intestinal parasites, which can potentially cause severe coccidiosis associated with increased morbidity and mortality in certain threatened populations of spp.