Alvinonemertes dagmarae, Sagorny & Döhren & Rouse & Tilic, 2022

Sagorny, Christina, Döhren, Jörn von, Rouse, Greg W. & Tilic, Ekin, 2022, Cutting the ribbon: bathyal Nemertea from seeps along the Costa Rica margin, with descriptions of 2 new genera and 9 new species, European Journal of Taxonomy 845 (1), pp. 132-174 : 155-156

Alvinonemertes dagmarae gen. et sp. nov.

urn:lsid:zoobank.org:act:09E39C02-B087-4A95-A753-5D3C2F930632

Fig. 8E

Diagnosis

Alvinonemertes dagmarae 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 Dagmar Wenzel, lab technician at the Institute of Evolutionary Biology, University of Bonn. Acknowledging her support in the molecular lab, which included DNA extractions and PCRs for some of the specimens used in this study.

Material examined

Holotype

COSTA RICA • spec. (ethanol); non-seep seamount Quepos Plateau Hills ; 8.5323° N, 84.79072° W; depth 1410 m; 27 Oct. 2018; Charlotte Seid and Juan José Alvarado leg.; collected by HOV Alvin, Dive 4981; associated with a colony of Antipatharia Milne Edwards, 1857 ( SIO-BIC Co3031 ); GenBank: ON186254 , ON036049 , ON021866 , ON182034 ; SIO-BIC N260 .

Description

Specimen 5 cm long and 1 mm in diameter. One pair of cephalic furrows. Head rounded, not demarcated from rest of body. Body coloration white to yellowish, translucent. Internal organs visible through body wall ( Fig. 8E ).

Ecology

This species seems to be closely associated with antipatharian corals as several specimens were collected wrapped around one colony ( Fig. 8E ).

Remarks

The new species is attributed to the genus Alvinonemertes gen. nov. based on the executed phylogenetic analyses. In the concatenated analysis, A. dagmarae gen. et sp. nov. is sister to a clade comprising the three species A. christianeae gen. et sp. nov., A. claudiae gen. et sp. nov., and A. tatjanae gen. et sp. nov. and belongs to the well supported clade representing the genus ( Fig. 7 ).

Figures

Fig. 8. Live images of eumonostiliferous hoplonemerteans collected along the Costa Rica margin and the NE Pacific. A. Chernyshevia escarpiaphila sp. nov., paratype (SIO-BIC N112). B. Chernyshevia escarpiaphila sp. nov., paratype (SIO-BIC N266). C. Octocoral Paragorgia sp. (SIO-BIC Co3054) with several specimens of Alvinonemertes dariae sp. nov., holotype (arrows; ex SIO-BIC N262). D. Alvinonemertesdariaesp.nov.,holotype(exSIO-BICN262).E.Antipathariancoral(SIO-BICCo3031) with specimens of Alvinonemertes dagmarae sp. nov., holotype (SIO-BIC N260). F. Alvinonemertes christianeae sp. nov., holotype (SIO-BIC N253). G. Alvinonemertes claudiae sp. nov., holotype (ex SIO-BIC N231). H. Alvinonemertes tatjanae sp. nov., holotype (SIO-BIC N119). I. Eumonostilifera (SIO-BIC N259). J–L. Tetrastemma sundbergi sp. nov., holotype (SIO-BIC N256) whole animal (J), dorsal view of head (K), and ventral view of head (L). M. Tetrastemma polyakovae sp. nov. (MZUCR Nemertea Collection MZUCR-101-01).N. Tetrastemma polyakovae sp. nov., holotype (SIO-BIC N258), with everted proboscis. O. Eumonostilifera (SIO-BIC N109).

Fig. 7. Maximum likelihood (ML) tree for the monostiliferan supermatrix based on the concatenated four gene dataset (16S, COI, 18S, H3). Black circles indicate nodal support of 100/100/1.0; asterisks indicate nodal support of either 100/ or /1.0. Alternative branches found in the BI analysis are given as blue dotted lines. Sonnenemertes cantelli Chernyshev, Abukawa & Kajihara, 2015 and Micrura callima Sundberg & Gibson, 1995 were used for outgroup rooting. Specimens belonging to new species are given in bold. Specimen-ID, sampling locality, and depth (for deep-sea species) are provided.