Vol. 63, 2024

(update: 2024.6.11)

A New Species of Parapleurocrypta Chopra, 1923 (Isopoda, Epicaridea, Bopyridae)
Parasitizing Shrimps of the Genus Synalpheus Spence Bate, 1888 (Decapoda, Caridea, Alpheidae) from the Fernando de Noronha Archipelago, Brazil

Amanda P. Horch^1,*, Jason D. Williams², and Mariana Terossi¹

¹Programa de Pós-Graduação em Biologia Animal, Departamento de Zoologia (Laboratório de Carcinologia), Instituto de Biociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil. *Correspondence: E-mail: amandahorch@gmail.com (Horch)
E-mail: mterossirm@gmail.com (Terossi)
²Department of Biology, Hofstra University, Hempstead, NY 11549, USA. E-mail: Jason.D.Williams@hofstra.edu (Williams)

(Received 16 August 2023 / Accepted 6 February 2024 / Published 11 June 2024
Communicated by Benny K.K. Chan

A new species of Parapleurocrypta Chopra, 1923, a parasitic isopod genus of the family Bopyridae found parasitizing two species of the snapping-shrimp genus Synalpheus Spence Bate, 1888, is described from Brazil. This is the first record of Parapleurocrypta in the Atlantic Ocean, and the first species of
bopyrid parasite recorded from the Fernando de Noronha archipelago in northeastern Brazil. Females of Parapleurocrypta duofratres sp. nov. can be distinguished from the other two species of the genus, P. alphei Chopra, 1923 and P. digitata Bourdon, 1976, by the structure of the barbula, the reduced
pleopods, the number of dorsolateral bosses, the absence of the frontal lamina (present in P. digitata), and pleomeres with lateral plates (vs. lateral plates absent in P. digitata). Males can be distinguished from those of P. alphei by the number of antennal articles. Variation in the specimens is discussed and
ecological and reproductive data are provided. To accommodate the new features of P. duofratres sp. nov., the diagnosis of the genus is expanded. A review of the branchial bopyrids of Synalpheus is included, as well as a discussion of parasitism by members of Parapleurocrypta.

Key words: Atlantic Ocean, Bopyrinae, Bopyroidea, Parasitism, Taxonomy

Citation: Horch AP, Williams JD, Terossi M. 2024. A new species of Parapleurocrypta Chopra, 1923 (Isopoda, Epicaridea, Bopyridae) parasitizing shrimps of the genus Synalpheus Spence Bate, 1888 (Decapoda, Caridea, Alpheidae) from the Fernando de Noronha archipelago, Brazil. Zool Stud 63:13. doi:10.6620/ZS.2024.63-13.