New xenophyophores (Foraminifera, Monothalamea) from the eastern Clarion-Clipperton Zone (equatorial Pacific) Author Holzmann, Maria 0000-0003-2460-6210 Department of Genetics and Evolution, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Geneva, Switzerland. olzmann@unige.ch Author Barrenechea-Angeles, Inés Department of Genetics and Evolution, University of Geneva, Quai Ernest Ansermet 30, 1211 Geneva 4, Geneva, Switzerland. & Department of Geosciences, The Arctic University of Norway, Dramsvegen 201, 9037 TromsØ, Norway. Author Lim, Swee-Cheng Tropical Marine Science Institute, National University of Singapore, 18 Kent Ridge Road, Singapore 119227, Singapore. & Lee Kong Chian Natural History Museum, National University of Singapore, 2 Conservatory Drive, Singapore 117377 Author Pawlowski, Jan Institute of Oceanology, Polish Academy of Sciences, 81 - 712 Sopot, Poland. & ID-Gene Ecodiagnostics, Chemin du Pont-du-Centenaire 109, 1228 Plan-les-Ouates, Switzerland. text Zootaxa 2024 2024-03-06 5419 2 151 188 http://dx.doi.org/10.11646/zootaxa.5419.2.1 journal article 290635 10.11646/zootaxa.5419.2.1 d4a40af2-a5bf-43ed-95e3-98c1fd6c2942 1175-5326 10792055 88353CBA-6C4D-40E3-8475-B1FCA2C48637 The genus Stannophyllum We obtained two sequences from a second species of Stannophyllum . This is the most species-rich xenophyophore genus and was placed by Haeckel (1889) , Schultze (1907) , Tendal (1972 , 1996 ), together with a related genus Stannoma, in a distinct family, the Stannomidae , characterised by the presence of fine proteinaceous fibres that ramify the test. The new species groups with 100% bootstrap support with sequences from Stannophyllum zonarium , confirming that these are genuine Stannophyllum sequences. They consistently form a strongly supported (99% BV) group with Xenophyophore sp. 1. This is surprising since the only available material of Xenophyophore sp. 1 comprises tubular fragments that are morphologically completely different from Stannophyllum (Supplementary Figure 9c, d in Gooday et al ., 2017a ). The two sequences of Xenophyophore sp. 1 were obtained from one specimen and we would need additional material to examine and confirm its close molecular relationship with Stannophyllum .