Amazing Diversity of Nothria (Annelida, Onuphidae) in the Australian Deep Sea Paxton, Hannelore Budaeva, Nataliya Gunton, Laetitia M. Records of the Australian Museum 2023 Rec. Aust. Mus. 2023-05-17 75 3 215 247 84R3F Malmgren, 1867 Malmgren 1867 [368,681,1550,1577] Polychaeta Onuphidae Nothria Animalia Eunicida 6 221 Annelida genus   Diagnosis(adapted from Budaeva & Paxton, 2013). Body short, up to 100 segments. Prostomium anteriorly rounded to subtriangular, palps short, antennae moderately long; palpophores and antennophores with 2–5 rings. Peristomial cirri present; nuchal grooves straight. Anterior 2–3 pairs of parapodia modified, enlarged and directed anteroventrally, with large auricular prechaetal lobes. Dorsal cirri digitate to subulate, ventral cirri subulate on anterior 2–3 chaetigers. Branchiae present or absent, usually with single filaments. Uni- to bidentate (rarely tridentate) simple, pseudocompound or compound hooks on anterior modified parapodia, usually with hoods. Pectinate chaetae usually with rolled margins, so-called “scoop-shaped”, rarely flat, from chaetigers 2–3, rarely later. Subacicular hooks in median position from chaetigers 7–15, rarely later. Tubes dorsoventrally flattened with thin inner parchment-like layer covered with shell fragments, small stones and foraminiferans.