Boxshall, G.A., K. Nagasawa & J.P. Bernot. (2025). The male of Dinemoleus indeprensus Cressey & Boyle, 1978 with a brief overview of sexual dimorphism in the family Pandaridae (Copepoda: Siphonostomatoida). Plankton & Benthos Research, 15th International Conference on Copepoda. 20(suppl): s165–s174. Sep 2025.

515133

10.3800/pbr.20.s165 [view]

Boxshall, G.A., K. Nagasawa & J.P. Bernot

2025

20(suppl): s165–s174. Sep 2025

Publication

Available for editors   [request]

The male of Dinemoleus indeprensus reported, to date, only on the megamouth shark, Megachasma pelagios, is described in detail. It has a 2-segmented abdomen, the outer margin of the distal endopodal segment of leg 3 is unmodified, and leg 4 has a 1-segmented exopod but the endopod is indistinctly 2-segmented. This combination of character states is unique in the family. Males are now known for 20 of the 22 genera currently accepted as valid within the Pandaridae, so a brief overview of sexual dimorphism within the family is presented and a key to genera, based on males, is provided to facilitate identification in the future. Key words: copepod, morphology, Pandaridae, parasites, sexual dimorphism

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