Revision of the genus Robbea (Stilbonematinae: Desmodoridae), worldwide abundant marine nematodes with chromophoric Fe-Br inclusions and the description of a new stilbonematine genus Author Scharhauser, Florian Department for Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria Author Saavedra, Daniel E. M. Department for Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria Author Pröts, Philipp Department for Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria Author Ot, Jörg A. Department for Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria Author Geier, Benedikt Max Planck Institute for Marine Microbiology, Bremen, Germany & Stanford University, School of Medicine, Department of Paediatrics and Infectious Diseases, CA, USA Author Gruber-Vodicka, Harald R. Max Planck Institute for Marine Microbiology, Bremen, Germany & Zoological Institute, Christian-Albrechts-University, Kiel, Germany Author Polikarpov, Maxim European Molecular Biology Laboratory, Hamburg unit c / o DESY, Hamburg, Germany Author Bourenkov, Gleb European Molecular Biology Laboratory, Hamburg unit c / o DESY, Hamburg, Germany Author Leisch, Nikolaus Max Planck Institute for Marine Microbiology, Bremen, Germany & European Molecular Biology Laboratory, Heidelberg, Germany nleisch@mpi-bremen.de text Zoological Journal of the Linnean Society 2025 2024-03-01 203 1 https://doi.org/10.1093/zoolinnean/zlae005 journal volume 10.1093/zoolinnean/zlae005 0024-4082 Robbea bernarditae sp.nov. ZooBank registration: htp://zoobank.org: urn:lsid:zoobank.org: act: 3585C810-E79D-4E8C-A534-B6FE6AB23F14 . Tope location: Punta , BayBay , Leyte , Philippines ; intertidal, fine sand next to mangrove stand. Coordinates : 10.642584 N , 124.774708 E . Figure 4. Robbea judithae sp. nov. female. A, total view of paratype. B, pharynx region of paratype. C, tail of paratype. Abbreviations: anus, an; bulbus, b; begin bacterial coat, bbac; corpus, c; cephalic capsule, cc; cephalic seta, cs; egg, e; enlarged glandular sense organs, egso; fovea amphidialis, fa; gut, g; gubernaculum, gb; glandular sensory organ, gso; isthmus, i; ovary, ov; subcephalic seta, scs; spiculum, sp; spinneret, spt; tail gland, tg; vulva, vu. Tope material: One holotype (NHMW-ZOO-EV-M-5873), one paratype male (NHMW-ZOO-EV-M-5874). Collection date: June 1996 . Collector: J.A. Ot. Etomologo: Te species is dedicated to Bernardita Germano- Pilapil, former student of J.A. Ot, native of Leyte , Philippines , who helped with collection of specimens. Description: With the characters of the genus. Measurements see Supporting Information, Table S2 (excel sheet). Very small (<< 6 mm long) and rather stout species ( Figures 12 and 13 ). Amphids more distinctly spiral than in other species. Males with prominent enlarged GSO in ventral post-pharyngeal region, protruding as 19 bumps. Te species is remarkable for small (2 µm long) setae situated close to the submedian subcephalic setae. Cephalic capsule very long, extending over>70% of corpus. Long corpus occupies up to a third of pharynx length, large bulbus and consequently a very short isthmus (48–55% of pharynx length). Sparse somatic setae. Tail conical with rounded tip. Male testis with conspicuous large, round cells (sperm?). Symbiotic bacteria coccobacilli, 1.3 × 1 µm.