Rohdella amazonica n. sp. (Aspidogastrea: Aspidogastridae) from the Amazoninan banded puffer fish Colomesus psittacus (Bloch & Schneider, 1801)

Abstract

Aspidogastreans are commonly found infecting freshwater and marine molluscs, teleosts fishes and freshwater turtles. The subclass comprises four families - Rugogastridae Schell 1973, Stichocotylidae Faust & Tang 1936, Multicalycidae Gibson & Chinabut 1984 and Aspidogastridae Poche 1907 - and it is characterized by the presence of a ventral adhesive disc divided into rows of alveoli. In the current work, using light and scanning electron microscopy and molecular approaches, a new species of Aspidogastridae of the genus Rohdella Gibson & Chinabut, 1984, is described as a parasite of Colomesus psittacus in Brazil. The new taxon is distinguishable by the presence of oesophageal glands, teguments covered by ciliated papillae, and the position and shape of the hermaphroditic duct. The present work describes the third species of the genus Rohdella, thereby adding new morphological and molecular data regarding Aspidogastridae.

Helminth parasites of South American fishes: current status and characterization as a model for studies of biodiversity

“…Currently, Brazil includes the majority of the research groups in South America; they are distributed mainly in the north, south-east and south of the country. In the State of Pará, two groups have contributed mainly to helminth taxonomy, one resident in the UFPA, focusing on monogeneans (Branches & Domingues, 2014; Santos et al ., 2015), and the other in the UFRA, working on some other taxa (Melo et al ., 2013a, b) including the poorly known Aspidogastrea (Giese et al ., 2014). In the south-east, some groups belonging to three different institutions have contributed to taxonomic knowledge, as follows.…”

A new species of Huffmanela (Nematoda: Trichosomoididae) parasitizing Colomesus psittacus (Tetraodontiformes) from Marajó Island, Pará State, Brazil

“…Some previous studies with helminths in C. psittacus have been carried out and have identified the presence of Rohdella sp. (Silva et al, 2013); Rohdella amazonica (Giese et al, 2015), Gnathostoma sp. and Cucullanus marajoara (Pinheiro et al, 2017(Pinheiro et al, , 2018.…”

Cotylophoron marajoensis n. sp. (Digenea: Paramphistomidae) a parasite of Bubalus bubalis on Marajó Island, Pará, Brazilian Amazon

“…The trematodes found were fixed and processed according to Giese et al (2015). Ten trematodes were used for morphologic and morphometric analysis.…”