Nascimento, Rodolfo Leandro; Bispo, André; Fukuda, Marcelo V.; Paresque, Karla & de Paiva, Paulo Cesar, 2024. (2024). Together till the end: endosymbiosis of the annelid Haplosyllides floridana in the giant barrel-shaped sponge Xestospongia muta throughout the Tropical Atlantic. Journal of the Marine Biological Association of the United Kingdom. 104; e100: 1-7.

498479

10.1017/s0025315424000870 [view]

Nascimento, Rodolfo Leandro; Bispo, André; Fukuda, Marcelo V.; Paresque, Karla & de Paiva, Paulo Cesar, 2024

2024

104; e100: 1-7

Publication

Annelidabase

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The symbiotic relationship between the syllid polychaete, Haplosyllides floridana Augener, 1922, and the barrel-shaped sponge Xestospongia muta (Schmidt, 1870), originally documented solely in the Caribbean, is presumed to be species-specific. Recently, the host sponge has been found as a single species distributed across approximately 8000 km (from 26°N to 22°S). Herein we addressed new spatial and bathymetric population records of H. floridana to question the persistence of the association with X. muta, and whether, in the case of an association, the polychaete remains as a single species throughout this extensive distribution. Our findings change the restricted distribution of H. floridana, revealing a remarkable association with X. muta from Tropical north-western to south-western Atlantic including records in the Fernando de Noronha Archipelago and the Almirante Saldanha Seamount, at 270 m deep. The populations analysed in this study are morphologically consistent. The study underscores the need for further investigations into the connectivity of Xestospongia species, the presence of Haplosyllides in other ocean basins, and the shared evolutionary history between Xestospongia and Haplosyllides. The observed life cycle completion of H. floridana within the host sponge suggests a potential co-evolutionary relationship, offering insights into the intricate dynamics of symbiotic associations in marine ecosystems.

Atlantic Ocean (without specification)
Caribbean region
East South America

Systematics, Taxonomy

Annelida
Polychaeta

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