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Hexabothriidae and Monocotylidae (Monogenoidea) from the gills of neonate hammerhead sharks (Sphyrnidae) Sphyrna gilberti, Sphyrna lewini and their hybrids from the western North Atlantic Ocean

Published online by Cambridge University Press:  09 August 2022

Kaitlyn M. Dalrymple Open the ORCID record for Kaitlyn M. Dalrymple [Opens in a new window] ,
Isaure de Buron ,
Kristina M. Hill-Spanik ,
Ashley S. Galloway ,
Amanda Barker ,
David S. Portnoy ,
Bryan S. Frazier  and
Walter A. Boeger
Kaitlyn M. Dalrymple*
Affiliation:
Laboratory of Biological Interactions, Universidade Federal do Paraná, Curitiba, PR 81531-980, Brazil Department of Biology, College of Charleston, Charleston, SC 29424, USA
Isaure de Buron
Affiliation:
Department of Biology, College of Charleston, Charleston, SC 29424, USA
Kristina M. Hill-Spanik
Affiliation:
Department of Biology, College of Charleston, Charleston, SC 29424, USA
Ashley S. Galloway
Affiliation:
South Carolina Department of Natural Resources, Marine Resources Research Institute, 217 Fort Johnson Drive, Charleston, SC 29412, USA
Amanda Barker
Affiliation:
Marine Genomics Laboratory, Department of Life Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX 78412, USA
David S. Portnoy
Affiliation:
Marine Genomics Laboratory, Department of Life Sciences, Texas A&M University-Corpus Christi, 6300 Ocean Drive, Corpus Christi, TX 78412, USA
Bryan S. Frazier
Affiliation:
South Carolina Department of Natural Resources, Marine Resources Research Institute, 217 Fort Johnson Drive, Charleston, SC 29412, USA
Walter A. Boeger
Affiliation:
Laboratory of Biological Interactions, Universidade Federal do Paraná, Curitiba, PR 81531-980, Brazil
*
Author for correspondence: Kaitlyn M. Dalrymple, E-mail: kaitlyn.dalrymple@gmail.com
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Abstract

Neonates of hammerhead sharks (Sphyrnidae), Sphyrna lewini (Griffith and Smith, 1834), the sympatric cryptic species, Sphyrna gilberti Quattro et al., 2013, and their hybrids were captured in the western North Atlantic, along the coast of South Carolina, USA, between 2018 and 2019 and examined for gill monogenoids. Parasites were identified and redescribed from the gills of 79 neonates, and DNA sequences from partial fragments of the nuclear 28S ribosomal RNA (rDNA) and cytochrome c oxidase I mitochondrial DNA (COI) genes were generated to confirm species identifications. Three species of monogenoids from Hexabothriidae Price, 1942 and Monocotylidae Taschenberg, 1879 were determined and redescribed. Two species of Hexabothriidae, Erpocotyle microstoma (Brooks, 1934) and Erpocotyle sphyrnae (MacCallum, 1931), infecting both species of Sphyrna and hybrids; and 1 species of Monocotylidae, Loimosina wilsoni Manter, 1944, infecting only S. lewini and hybrids. Loimosina wilsoni 28S rDNA sequences matched those of Loimosina sp. from the southern coast of Brazil. Based on limited morphological analysis, Loimosina parawilsoni is likely a junior synonym of L. wilsoni. This is the first taxonomic study of monogenoids infecting S. gilberti and hybrids of S. gilberti and S. lewini.

Keywords

Carolina hammerheadHexabothriidaehost repertoirehybridsMonocotylidaescalloped hammerheadSphyrnidaetaxonomy
Type
Research Article
Information
Parasitology , Volume 149 , Special Issue 14: Fish Parasitology , December 2022 , pp. 1910 - 1927
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Copyright
Copyright © The Author(s), 2022. Published by Cambridge University Press

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