The tapeworm genus Mariauxiella (Onchoproteocephalidea, Proteocephalidae) was recently revised and its species composition reappraised; however, its actual species diversity remains incompletely understood. In the present study, an integrative taxonomic approach combining morphological, ultrastructural, and molecular phylogenetic analyses was applied to proteocephalid tapeworms collected from the driftwood catfish Ageneiosus m...

Aglaiogyrodactylus Kritsky, Vianna & Boeger, 2007 comprises ectoparasitic metazoans recorded mainly on the body surface of loricariid fishes. Although the genus currently includes only eight species, its actual diversity remains largely underestimated. In this study, three new species of Aglaiogyrodactylus collected from specimens of Hisonotus spp. in Brazil are described, and a new locality record of Aglaiogyrodactylus pedunc...

Bokermannohyla frogs comprise species distributed across different Brazilian biomes, several of which are currently listed as endangered species. These anurans host a diversity of parasites that may negatively affect their survival. Several tick species of the family Argasidae and chigger mites of the family Leeuwenhoekiidae exhibit host specificity toward this group. Here, we report a case of co-parasitism by argasid ticks an...

Species of Micropleura Linstow, 1906 (Dracunculoidea: Nematoda) are common parasites of crocodilians worldwide. Studies related to this genus remain scarce, particularly regarding genetic characterizations, due to the difficulty in obtaining the parasite specimens. Although the morphology of M . vazi Travassos, 1933, a parasite of Caiman spp. in the Neotropics, has been previously evaluated, some morphological inconsistencies...

The sacred kingfisher Todiramphus sanctus is a widespread bird species that is non-migratory in New Zealand, in contrast to elsewhere in the world. We describe a new species of Skrjabinoclava , a genus of acuariid nematodes, recovered from the oropharynx of sacred kingfishers in New Zealand. This is the first record of Skrjabinoclava in Australasia and the first publicly available DNA sequence for the genus. Skrjabinoclava pha...

To date, only a single species of the digenean genus Macvicaria Gibson & Bray, 1982— Macvicaria obovata (Molin, 1859)—has been reported from southern African coastal waters, infecting three fish species (two sparids and one cheilodactylid). Given the general paucity of information on digeneans from marine fishes in this region, the present study aimed to explore the diversity of these parasites in the endemic sparids the Cape...

Cory’s Shearwater ( Calonectris borealis ), a migratory seabird from the Procellariidae family, is widely distributed across the Atlantic Ocean. It breeds on islands of Azores, Madeira, Canary, and Berlengas, and winters in coastal areas of South America and Africa. This species’ wide habitat range contributes to pathogen exchange across global regions. Plasmodium , a genus of apicomplexan parasites causing avian malaria, affe...

This study is an integrative taxonomic analysis of a new species of the genus Vancleaveus reported for the first time parasitizing the gills of Doras higuchii (Siluriformes, Doradidae) in the Xingú River Basin, Pará, Brazil. Vancleaveus perditus n. sp. differs from other congeneric species by having a sinistral vaginal aperture, ventral bar with an anteromedian projection, dorsal bar with a posteromedial projection, and a slig...