Raricirrus Hartman 1961

Genus Raricirrus Hartman, 1961 Type species Raricirrus maculatus Hartman, 1961. Original designation. Diagnosis (after Magalhães et al. 2017) Prostomium rounded, eyes absent, nuchal organs shallow ciliary pits, postero-lateral, rounded or elongate. Peristomium not obviously delimited from prostomium and chaetiger 1 dorsally; ventral cilia may be present on peristomium and first few segments; first segment complete chaetiger. Tentacles absent. Branchiae present on several segments, filiform or club-like distally. Notochaetae short and long serrate capillaries anteriorly and modified chaetae posteriorly as acicular spines, coarsely serrate forms and short pectinate falcigers. Neurochaetae short serrate capillaries and/or modified chaetae such as acicular spines, falcate and finely pectinate, and coarsely serrate chaetae. Simple enlarged spines may be present in one or two posterior end segments. Heart body enlarged dorsal vessel present in variable number of anterior and middle segments. Pygidium simple lobe, anal aperture usually dorsal; posterior region distinct with few segments wider than preceding ones. Asexual reproduction via architomy. Sexual reproduction may occur; epitoke individuals, hermaphroditism, seminal vesicle and reproductive stylet may be present.