Alvinonemertes tatjanae Sagorny & Döhren & Rouse & Tilic 2022, gen. et sp. nov

Alvinonemertes tatjanae gen. et sp. nov. urn:lsid:zoobank.org:act: B3C2ABC6-34E6-497C-9A66-023A5751DC78 Fig. 8H Diagnosis Alvinonemertes tatjanae gen. et sp. nov. can be attributed to the genus Alvinonemertes gen. nov. based on the strong support for a sister group relationship between the five species of this genus. Etymology For Tatjana Bartz, lab technician at the Institute of Evolutionary Biology, University of Bonn. Acknowledging her support in the electron microscopy lab over many years. Tatjana has trained the last author in specimen preparation for transmission electron microscopy, for which he will ever be grateful. Material examined Holotype USA • spec. (ethanol); Hydrate Ridge, Oregon margin; 44.670° N, 125.098° W; depth ca 618 m; 3 Aug. 2010; Victoria Orphan and José Patterson leg.; collected by HOV Alvin, Dive 4631; GenBank: ON186256, ON036047, ON021864, ON182041; SIO-BIC N119. Description Specimens 7–9 mm long and 0.7 mm in diameter. Body rounded. One pair of cephalic furrows. Head not demarcated from rest of body, rounded. Body pale red to pinkish with several red pigment spots distributed over body surface. Gonads and gut well visible through body wall (Fig. 8H). Remarks Alvinonemertes tatjanae gen. et sp. nov. is attributed to the genus Alvinonemertes gen. nov. based on the executed phylogenetic analyses. In the concatenated analysis, it is sister to the clade comprising A. christianeae gen. et sp. nov. and A. claudiae gen. et sp. nov. (Fig. 7).