Tanseimaruana boninensis Imajima, Reuscher & Fiege, 2013, sp. nov.

• Main Authors: Imajima, Minoru, Reuscher, Michael G., Fiege, Dieter
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2013
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Ampharetidae; Tanseimaruana; Tanseimaruana boninensis; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5698327; http://treatment.plazi.org/id/03C687A0FFEFFF97FF35F9F2FC48A7E6

Tanseimaruana boninensis sp. nov. (Figs. 13 A–I; 17D) Specimens examined. Holotype: NSMT-Pol. H 561: off Chichijima Island, 27°17.99'N, 142°44.00'E – 27°18.08'N, 142°43.96'E, 2840–2855 m, 3.2009, St. TE-02(2), R/V Tansei-Maru . Additional material examined. Amphicteis vestis Hartman, 1965 Holotype: LACM-AHF POLY 278: North Atlantic, USA, New England continental slope, east of upper end of Block Canyon, 39°58'24''N, 70°40'18''W, 300 m, Sta. Slope3: anchor dredge, R/V Atlantis, coll. Sanders, H., Woods Hole Oceanographic Institution, 28 August 1962 Paratype: LACM-AHF POLY 279: from the same station as holotype. Description. Holotype incomplete and broken between thorax and abdomen, length 7.5 mm, width 0.8 mm. Prostomium roughly pentagonal, with brown pigment spots and short paired nuchal slits, without incision, glandular ridges or eyespots (Fig. 13 A). Border of peristomium and segment I discernable (Fig. 13 A, B). Buccal tentacles smooth. Lower lip smooth. Four pairs of branchiae, all broken off, in a rhomb-like arrangement in segments II–IV (Figs. 13 A, 17D); branchial groups separated by wide median gap; segmental origin of branchiae indeterminable. Chaetae of segment II (paleae) longer and slightly thicker than following notochaetae (Fig. 13 A, B); paleae tapering evenly to hairlike tips (Fig. 13 C); 10 paleae on each side. Notopodia with capillary notochaetae from segment III, present in 17 chaetigers; notopodia of segments III and IV small, without ventral papilla, dorsally elevated, with fine capillary chaetae (Fig. 13 B); subsequent notopodia larger, with conical ventral cirrus (Fig. 13 D) and narrowly limbate capillary chaetae. Neuropodial tori with uncini from segment VI, present in 14 thoracic uncinigers, conspicuously erect from body, with conical dorsal cirrus (Fig. 13 D). Continuous ventral shields present to thoracic unciniger 8. Intermediate uncinigers absent. Holotype incomplete, with 2 abdominal uncinigers. First abdominal unciniger with dermal fold across dorsum, bearing 4 foliose lobes with ...