Kirkegaardia carolina Blake, 2016, new species

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Terebellida; Ctenodrilidae; Kirkegaardia; Kirkegaardia carolina; North Atlantic
• Online Access: https://doi.org/10.5281/zenodo.5612212; http://treatment.plazi.org/id/277D879E2E64895905E12A36FC402E19

Kirkegaardia carolina new species Figures 9, 10 A–C Tharyx sp. 3: Blake et al. 1987: Appendix C-2; Hilbig 1994: 941. Material examined. Western North Atlantic, off Cape Lookout, North Carolina , U.S. South Atlantic ACSAR Program Cruise 1, R/ V Columbus Iselin Sta. 2, Rep. 1, 12 November 1983, 34°14.87′N, 75°43.79′W, 1013 m, coll. J.A. Blake, Chief Scientist, holotype (USNM 1407162); Sta. 1, Rep. 2, 11 November 1983, 34°16.36′N, 75°45.50′W, 640 m, coll. J.A. Blake, Chief Scientist, 3 paratypes (USNM 1407163). Description. An elongate, threadlike, fragile species; holotype from Sta. 2 complete, broken into two parts, 9.4 mm long, 0.2 mm wide across thorax and 0.23 mm wide across middle abdominal segments for about 75 setigers; complete paratype (very fragile) from Sta. 1 complete, 7.3 mm long, 0.3 mm wide with about 65 setigers (Fig. 10 A). Bodies of some paratypes partially covered by remnants of thin, transparent tattered tube (Fig. 10 A–C). Color in alcohol, light tan with no pigment. Pre-setigerous region about 1.7x as long as wide. Prostomium triangular, narrowing to rounded tip (Fig. 9 A); eyes absent; nuchal organs not observed. Peristomium elongate, slightly wider than anterior setigers, about 1.3x as long as wide, extending posteriorly to between setiger 1; lateral grooves producing three annular rings; dorsal surface elevated with broad dorsal ridge (Fig. 9 A). Dorsal tentacles arising on posterior part of peristomium; first pair of branchiae posterior to tentacles on setiger 1 at posterior margin of setiger 1, dorsal to notosetae (Fig. 9 A). Subsequent branchiae in same position on following thoracic setigers. Thoracic region with 8–10 setigerous segments, each about 3x as wide as long (Fig. 9 A); thoracic parapodia not elevated, dorsal surface between parapodia continuous over dorsum; body without ventral groove or ridge. Abdominal segments weakly moniliform, increasing in length to about 2.5x as long as wide (Fig. 9 B); far posterior segments becoming narrow again, wider than long, forming elongated, ...