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First occurrence of the genus Pandeopsis (Hydrozoa: Anthoathecata) in the South Atlantic Ocean

Published online by Cambridge University Press:  16 September 2025

José Victor Rodrigues Open the ORCID record for José Victor Rodrigues [Opens in a new window] ,
Ralf Schwamborn ,
Sigrid Neumann Leitão ,
Miodeli Nogueira Júnior ,
Arnaud Bertrand  and
Everton Giachini Tosetto
José Victor Rodrigues*
Affiliation:
Departamento de Oceanografia, Universidade Federal de Pernambuco, Recife, Brazil
Ralf Schwamborn
Affiliation:
Departamento de Oceanografia, Universidade Federal de Pernambuco, Recife, Brazil
Sigrid Neumann Leitão
Affiliation:
Departamento de Oceanografia, Universidade Federal de Pernambuco, Recife, Brazil
Miodeli Nogueira Júnior
Affiliation:
Departamento de Sistemática e Ecologia, Universidade Federal da Paraíba, João Pessoa, Brazil
Arnaud Bertrand
Affiliation:
Departamento de Oceanografia, Universidade Federal de Pernambuco, Recife, Brazil MARBEC, Université de Montpellier, CNRS, IFREMER, IRD, Sète, France Institut de Recherche pour le Développement, Sète, France Departamento de Pesca e Aquicultura, Universidade Federal Rural de Pernambuco, Recife, Brazil
Everton Giachini Tosetto
Affiliation:
Departamento de Oceanografia, Universidade Federal de Pernambuco, Recife, Brazil MARBEC, Université de Montpellier, CNRS, IFREMER, IRD, Sète, France Institut de Recherche pour le Développement, Sète, France
*
Corresponding author: José Victor Rodrigues; Email: victor.rodrigues2@ufpe.br
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Abstract

A specimen of the genus Pandeopsis Kramp, 1959 was found in surface waters off the northeast Brazilian coast at 10.93°S, 36.48°W. The specimen was assigned to the family Pandeidae on the basis of the presence of more than four hollow marginal tentacles and the absence of divided radial canals, marginal tentacles with terminal cnidocyst cluster, and oral tentacles. Among Pandeidae, the specimen was assigned to Pandeopsis due to the absence of lateral diverticula, centripetal canals, and marginal cirri as well as the presence of more than two marginal tentacles, mesenteries, smooth gonads, and manubrium with a quadrangular base. To the moment, the unique morphological trait that is likely to distinguish the two species of the genus is the presence of medusa buds in the gonads of Pandeopsis prolifera, which was not present in the specimen we found. However, as this is not a strong trait to distinguish species, we consider the present specimen to be Pandeopsis cf. ikarii. This study represents the first record of the genus in the South Atlantic Ocean.

Keywords

biodiversitycnidariansecologyhydromedusaejellyfish

Information

Type
Marine Record
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 105 , 2025 , e103
Copyright
© The Author(s), 2025. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom.

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