Higher classification of the Monostilifera (Nemertea: Hoplonemertea) Author Kajihara, Hiroshi text Zootaxa 2021 2021-01-28 4920 2 151 199 journal article 8401 10.11646/zootaxa.4920.2.1 ec1a3d33-651e-499c-b775-b42a131ec75a 1175-5326 4475126 C369AA2D-29D5-4DDF-BFE2-EA4FC4AD2703 Cinclidonemertes mooreae Crandall, 2010 Remarks Established based on four specimens, up to 3.7 mm in length, collected from 19–25 m depth near Wauwermans Islands, Antarctica . With four eyes. The rhynchocoel is “composed of single fibres spaced apart from one another in a partially woven lattice” ( Crandall 2010: 2412 ), a character state that cannot readily be interpreted as decisively homologous with that in Cratenemertea and/or Plectonemertidae . The cerebral organs are large, located behind the pre-cerebral septum, lying beside and beneath the brain, and thus conforming to those in Cratenemertea , but also in Proamphiporus Chernyshev & Polyakova, 2019 . The vascular plug is “broad and flat, lying tightly against ventral wall of rhynchocoel” ( Crandall 2010: 2421 ), but one of the original figures ( Crandall 2010 , fig. 12) depicts it as if there are two vascular plugs, reminiscent of the character state in Oerstediina . The taxonomic placement of the family Cinclidonemertidae Crandall, 2010 , the genus Cinclidonemertes Crandall, 2010 , and C. mooreae among Monostilifera thus requires further scrutiny.