Acta Parasitologica

, Volume 64, Issue 4, pp 797–806 | Cite as

Redescription and First Nucleotide Sequences of Rhinobatonchocotyle pacifica Oliva & Luque, 1995 (Monogenea: Hexabothriidae), a Parasite of Pseudobatos planiceps (Garman, 1880) (Rhinopristiformes: Rhinobatidae) from Peru

  • Jhon D. Chero
  • Celso L. Cruces
  • Gloria Sáez
  • Ana C. A. Camargo
  • Cláudia Portes Santos
  • José L. LuqueEmail author
Original Paper



Specimens of Rhinobatonchocotyle pacifica Oliva & Luque, 1995 (Hexabothriidae) were collected from the gill filaments of Pacific guitarfish, Pseudobatos planiceps (Garman, 1880) (Rhinopristiformes: Rhinobatidae), from off the coast of Chorrillos, Lima, Peru. Since the original description of R. pacifica was incomplete, we herein redescribe R. pacifica based on re-examination of the holotype, paratypes, and newly collected voucher specimens. Nucleotide sequences (18S, 28S) for R. pacifica are presented for the first time, and a phylogenetic analysis conducted.

Materials and Methods

Monogeneans were examined with light microscopy and partial sequences of 18S and 28S rDNA genes were obtained.


The following taxonomically important morphological features are described: presence of seminal receptacle, spiniform papillae within oral cavity, haptoral sucker sclerites and anchors, hook surface striations, muscular pad associated with each haptoral sucker sclerite (except sclerite 1), muscular bulbs in appendix suckers, and oötype lacking longitudinal rows of large cells (oötype not côtelé). The genital complex is detailed. The diagnosis of Rhinobatonchocotyle is emended to include species with or without seminal receptacle. Representative nucleotide sequences of partial 18S and 28S rDNA genes of R. pacifica were obtained for the first time and used for reconstructing the phylogeny of Hexabothriidae.


The phylogenetic reconstruction confirmed the species within the Hexabothriidae.


Chondrichthyans Ectoparasites Monogeneans Pacific Ocean Phylogeny Taxonomy 



To Anna Phillips (USNM) for allowing us access to specimens under her care. We also thank Griselda Pulido-Flores for providing us with valuable literature on hexabothriids. The authors are grateful to the following people who helped to the collection of fishes in Peru: Ivette Cuellar, Eva G. Huancachoque and Cynthia E. Rodríguez, all from the National University Federico Villarreal (UNFV). José L. Luque and Cláudia P. Santos were supported by a Researcher fellowship from the Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil (CNPq). Jhon D. Chero and Celso L. Cruces were supported by a student fellowship from the Coordenação de Aperfeiçoamento de Pessoal do Ensino Superior, Brazil (CAPES)—Finance Code 001.


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Copyright information

© Witold Stefański Institute of Parasitology, Polish Academy of Sciences 2019

Authors and Affiliations

  1. 1.Programa de Pós-Graduação em Biologia Animal da Universidade Federal Rural do Rio de JaneiroSeropédicaBrazil
  2. 2.Programa de Pós-Graduação em Ciências Veterinárias da Universidade Federal Rural do Rio de JaneiroSeropédicaBrazil
  3. 3.Laboratorio de Parasitología General y Especializada, Facultad de Ciencias Naturales y MatemáticaUniversidad Nacional Federico Villarreal (UNFV)LimaPeru
  4. 4.Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo CruzFundação Oswaldo CruzRio de JaneiroBrazil
  5. 5.Departamento de Parasitologia AnimalUniversidade Federal Rural do Rio de JaneiroSeropédicaBrazil

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