Nausithoe hagenbecki Jarms, 2001

(Fig. 7: E–H)

Nausithoe hagenbecki Jarms, 2001: 14–18, figs 1–5.

Holotype ZMH C11659.

Material examined: ZMH C11659.

Diagnosis: medusa—hypodome bell with short tentacles and gonads arranged in pairs; polyp—solitary with 16 cusps per whorl and collar surrounded by multiple club-like lips.

Description: Based on original description. Adult medusae 5 mm in diameter, 3.7 mm between rhopalia and 1.6 mm being the flat central disc (hypodome); rhopalia with statolith and a dark red pigmented ocellus; stout and short tentacles (shorter than the lappets); one gastric filament per quadrant (four in total); spherical gonads arranged in pairs situated beneath the coronal groove. Polyp solitary with at least two whorls of 16 cusps; 28.8 mm in total length; soft body with four lobes at the collar and mouth surrounded by four bigger (coming from the gastric septae) and 16 smaller (from the mouth margin) club-like lips; up to 8.2 mm-long slender tentacles.

Type locality: found in the tropical aquarium of the Hagenbeck Zoo in Hamburg, Germany.

Distribution: Unknown, not yet found in the wild.

Remarks: The polyp’s soft body morphology in this species is remarkably different from other animals of the genus, with four lobes at the collar and mouth surrounded by four bigger and 16 smaller club-like lips. The shape and positioning of the gonads, arranged in pairs, are the most distinctive characteristics of the medusae.