2026-10-15T10:16:25Z https://data.mendeley.com/oai

oai:data.mendeley.com/wzzvy9jyth.1 2026-06-01T07:56:24Z

Guzman-Valdivieso, Ismael Uncoupled histories in the largest continental arc of North America: goodeid fishes and their gyrodactylid parasites influenced differently by the Trans-Mexican Volcanic Belt Mendeley Data We characterized monopisthocotylans infecting endemic goodeid fishes south of the Trans-Mexican Volcanic Belt (TMVB), a major North American barrier separating the Nearctic and Neotropical biogeographic provinces. Considering TMVB emergence powerfully influenced goodeid diversification and distribution, we assessed whether it also affected Gyrodactylus lineages associated with these nearctic hosts. Previously, six Gyrodactylus spp. were known to infect goodeids (Goodea atripinnis, Giradinichthys multiradiatus) within and north of the TMVB; we recorded six gyrodactylids (two known, four undescribed species) infecting Ilyodon and Allotoca spp. south of the TMVB (S-TMVB). Using phylogenetic (internal transcribed spacer, cytochrome oxidase subunit II) and species delimitation (ASAP, MSC models) analyses, we tested three hypotheses: 1) ancient parasite lineages whose association with goodeids probably predates TMVB emergence occur both sides of this barrier; 2) following TMVB emergence, some nearctic gyrodactylids will only be found S-TMVB; 3) gyrodactylids infecting goodeids S-TMVB switched hosts from other Cyprinodontiformes. Analyses showed that: 1) Gyrodactylus tomahuac occurs both sides of the TMVB; 2) no nearctic parasites were found S-TMVB, confirming TMVB is a biogeographical barrier; 3) four undescribed gyrodactylids infecting goodeids S-TMVB are morphologically and phylogenetically closely-related to parasites infecting profundulid fishes, suggesting host switches from these neotropical hosts whose northern distribution limit is the TMVB. Our data reveal a complex and profound evolutionary history of Gyrodactylus species parasitizing goodeids, uncoupled from that of their hosts. Phylogenetic analyses and Multispecies Coalescent models suggest three main parasite groups are associated with goodeid fishes, and that gyrodactylids have historically switched hosts between Cyprinodontiformes (Goodeidae, Profundulidae, Poeciliidae). Fish Parasitism García-Arguello, Guadalupe Pinacho-Pinacho, Carlos Daniel Rubio-Godoy, Miguel Dataset doi:10.17632/wzzvy9jyth.1 oai:data.mendeley.com/wzzvy9jyth.1 Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 https://data.mendeley.com/datasets/wzzvy9jyth 2026-06-01T07:56:24Z