RT Journal Article T1 Ryuguderes casarrubiosi sp. nov., a new deep-sea representative of the enigmatic genus Ryuguderes (Kinorhyncha: Cyclorhagida: Campyloderidae) from the Indian Ocean A1 Cepeda Gómez, Diego A1 Sánchez Santos, Nuria A1 Olu, Karine A1 Zeppilli, Daniela AB A new species of the rare genus Ryuguderes is described from a deep-sea muddy seafloor part of a cold seep area at the Mozambique Channel (western Indian Ocean). The new species is easily distinguished from its only known congener by the arrangement of the middorsal (segments 2–9 in Ryuguderes iejimaensis vs. segments 1–10 in the new species) and the lateroventral acicular spines (segments 4 and 6–9 in R; iejimaensis vs. segments 3–4 and 6–9 in the new species) as well as the ventromedial female papillae (segments 6–7 in R. iejimaensis vs. segments 6–8 in the new species). Despite the ecological peculiarities of the habitat where the new species was found, all the examined specimens were recovered outside any active pockmark, which could point towards a lack of adaptation to the extreme environmental conditions associated with cold seeps. PB Elsevier SN 0044-5231 YR 2022 FD 2022-09 LK https://hdl.handle.net/20.500.14352/125249 UL https://hdl.handle.net/20.500.14352/125249 LA eng NO Cepeda, D., Sánchez, N., Olu, K., & Zeppilli, D. (2022). Ryuguderes casarrubiosi sp. nov., a new deep-sea representative of the enigmatic genus Ryuguderes (Kinorhyncha: Cyclorhagida: Campyloderidae) from the Indian Ocean. Zoologischer Anzeiger, 300, 92-101. https://doi.org/10.1016/J.JCZ.2022.08.001 NO This study was done within the framework of the PAssive Margin Exploration LAboratories (PAMELA) project, funded by TOTAL and IFREMER. NO Total NO Institut Français de Recherche pour l'Exploitation de la Mer DS Docta Complutense RD 21 mar 2026