Dawbinia

Prostomium with entire anterior margin. Maxillary ring of pharynx without papillae. Maxillary ring of pharynx without paragnaths. Oral ring papillae absent. Oral ring paragnaths absent. Transverse dorsal lamellae absent. Notopodial homogomph spinigers absent; sesquigomph spinigers absent. Notopodial homogomph falcigers absent. Neuropodial dorsal fascicle fused falcigers absent.

Unless stated otherwise in the below description, the following character states are implicit for all Nereididae species: Maxillary ring of pharynx without papillae. Maxillary ring divided into discrete Areas. Maxillary ring of pharynx with paragnaths; paragnaths arranged in discrete areas; Areas II, III and IV paragnaths not in regular comb-like rows (but may be arranged in irregular rows). Area I minute rod-like paragnaths in a compact cluster absent; II minute rod-like paragnaths in a compact cluster absent; pectinate paragnaths absent; minute rod-like paragnaths in a compact cluster absent; pectinate paragnaths absent; minute rod-like paragnaths in a compact cluster absent; smooth bar-like paragnaths absent; pectinate paragnaths absent. Oral ring papillae absent. Ring of oral ring paragnaths present as irregular rows, not crown-shaped. Smooth bars absent; pectinate rows absent; pectinate paragnaths absent; arranged in one or more irregular lines forming a continuous band; Area VII-VIII paragnaths similar in size, or irregular mix of large and small paragnaths in a single band. Transverse dorsal lamellae absent. Dorsal notopodial ligule not markedly elongate on posterior chaetigers. Not markedly broader on posterior chaetigers. Ventral cirri single.

Distinguished from other Nereididae genera by: Tentacular segments Separate; two distinct segments carry tentacular cirri; Achaetigerous anterior segments One apodous anterior segment