Robbea seahi, Scharhauser & Saavedra & Pröts & Ot & Geier & Gruber-Vodicka & Polikarpov & Bourenkov & Leisch, 2025

Robbea seahi sp.nov.

ZooBank registration: http://zoobank.org: urn:lsid:zoobank.org:act:5B3D9322-A4D5-44FB-8B55-B45FC258C271 .

Type location: Yakata   GoogleMaps , Okinawa, Japan; shallow subtidal sand. Coordinates: 26.4926 N, 127.842126 E.

Type material: One holotype ( NHMW-ZOO-EV-M-5871 ), GoogleMaps three paratypes male ( NHMW-ZOO-EV-M-5872/1-3 ). Collection date: Dec. 2017. Collector: B. Seah. GoogleMaps

Other material: Several specimens in J.A. Ott collection.

Etymology: The species is dedicated to Brandon Seah, marine scientist who collected the worms.

Description: With the characters of the genus. Measurements see Supporting Information, Table S2 View Table 2 .

Small (<6 mm long) and slender species ( Figures 10 View Figure 10 and 11 View Figure 11 ). Males with prominent, enlarged GSO in ventral post-pharyngeal region, protruding as 17–20 bumps. Subcephalic setae almost as long as cephalic setae. Cephalic capsule short, extending over about 50% of corpus. Corpus occupying about 25% of pharynx length, isthmus long (>60%), very small, round, glandular bulbus. Small somatic setae distributed over body. Tail conical with pointed tip. Symbiotic bacteria slender rods, 3,7 × 1.5 µm.