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oai:docta.ucm.es:20.500.14352/1162642025-03-18T13:09:41Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Sánchez Santos, Nuria author García Cobo, Marta author Shimabukuro, Mauricio author Zeppilli, Daniela author Nomaki, Hidetaka author González Casarrubios, Alberto author 2024 The knowledge about the deep-sea Kinorhyncha community has increased considerably in recent years. However, the records of kinorhynchs inhabiting hadal depths are still extremely limited. In the present study, we describe a new species of Echinoderes discovered from the South Orkney Trench, Southern Ocean. Echinoderes australis sp. nov. is characterized by the presence of middorsal acicular spines on segments 4-8 and lateroventral ones on segments 6-9, and tubes in lateroventral position on segment 5, in lateral accessory position on segment 8, and in laterodorsal position on segment 10. Additionally, the new species has conspicuous papillary flaps on segments 8-9. Among its morphological characteristics, the increase in length of the middorsal spine of segment 8 and lateroventral spines of segment 9 in relation to those of the previous segments are striking features, showing a whip-like appearance. E. australis sp. nov. Becomes the third hadal species of the phylum. In addition, we provide morphological information on the two other species found in the trench. Finally, we study in detail the diversity and distribution patterns of the Kinorhyncha of the South Orkney Trench, addressing aspects such as species richness, abundance, number of adults versus juveniles and the effect of bathymetry on the community composition. Sánchez, N., García-Cobo, M., Shimabukuro, M., Zeppilli, D., Nomaki, H., & González-Casarrubios, A. (2024). Discovery of a new Kinorhyncha species from the uncharted South Orkney Trench (Southern ocean). Zoologischer Anzeiger, 313, 315-331. https://doi.org/10.1016/j.jcz.2024.10.016 0044-5231 10.1016/j.jcz.2024.10.016 https://hdl.handle.net/20.500.14352/116264 1873-2674 https://doi.org/10.1016/j.jcz.2024.10.016 https://www.sciencedirect.com/science/article/pii/S0044523124001074?via%3Dihub Discovery of a new Kinorhyncha species from the uncharted South Orkney Trench (Southern Ocean)