New data on the acanthocephalan Neoechinorhynchus villoldoi Vizcaíno, 1992 (Neoechinorhynchidae: Acanthocephala), based on specimens found in Austrolebias bellottii (Steindachner, 1881) (Rivulidae: Cyprinodontiformes) from Punta Indio, Argentina

Abstract

In a survey of parasites on the killifish, Austrolebias bellottii from Punta Indio and Magdalena, Argentina, the acanthocephalan Neoechinorhynchus villoldoi was found. This parasite had not been recorded since 1992 when it was described for the first time parasitizing Corydoras paleatus (Jenyns, 1842). The type material of N. villoldoi was examined, and with addition of the new specimens, the measurements range was extended. This is the first record of an acanthocephalan in the annual fish, A. bellottii.

First report of Spirometra (Eucestoda; Diphyllobothriidae) naturally occurring in a fish host

“…These organisms are an attractive model for various topics in biology due to their particular life cycle and the ability of their drought-resistant eggs to survive dry periods through diapauses in their embryonic development (Costa 2002, 2006, Loureiro et al 2004, 2011, Arezo et al 2007, Berois et al 2015. However, a neglected aspect of the biology of this genus is its parasite fauna, with only seven published parasitological reports (Pereira and Vaz 1933, Taberner et al 2003, Luque et al 2011, Delgado and García 2015, Montes et al 2017, Marcotegui et al 2018, Vettorazzi et al 2020.…”