Revision of Chone Krøyer, 1856 (Polychaeta: Sabellidae) from North America and descriptions of four new species Author Tovar-Hernández, María Ana text Journal of Natural History 2007 2007-06-30 41 9 - 12 511 566 http://dx.doi.org/10.1080/00222930701250912 journal article 10.1080/00222930701250912 1464-5262 5233957 Chone ungavana Chamberlin, 1920 incertae sedis ( Figure 18H–N ) Chone ungavana Chamberlin 1920 , p 26 –27, Plate 4, Figures 1–4 . Material examined Type material. North West Territories [ CMN 1900-8369 ( holotype ) Hudson Strait , King George’s Sound , 62 ° N , 73 ° W , 64.3 m , coll. Low and Wakeham , Diana Expedition , September 1897 ] . Additional material. Chone infundibuliformis KrØyer, 1856 [ ZMUC POL-1749 , lectotype ; USNM-376, paralectotype ; BMNH 82.5 .12.33, paralectotype ] . Description Holotype dried out, complete but torn in thorax and abdomen. Branchial crown as long as half of the body length. Insertion of the branchial lobes exposed beyond collar, anterior peristomial ring lobe triangular, exposed beyond collar. Ventral margin of collar higher than dorsal. Dorsal margins forming two deep pockets. Radioles with broad flanges, radiolar tips short. Ventral shield of collar swollen. Thoracic uncini distributed as irregular double rows in tori, four rows of teeth above the main fang, hood present ( Figure 18I ). Bayonet chaetae ( Figure 18H ). Anterior abdominal uncini with four to five rows of teeth above the main fang, occupying half the length of main fang, main fang not extending beyond breast, breast rectangular ( Figure 18J, K ), posterior abdominal uncini similar to the anterior ones, but smaller ( Figure 18L, M ). Pygidium rounded ( Figure 18N ). Holotype female with oocytes in thorax. Figure 19. Thoracic transversal sections. (A) Chone ecaudata ; (B) Chone mollis ; (C) Chone quebecensis n. sp. (A) [LACM-AHF LH02-1205]; (B) [LACM-AHF, Han Lee]; (C) [CMN 1989-0385]. Remarks Holotype is dried out, no additional material is available, and there are no new records of this species since its description in 1920. From the holotype , only a few characters were recognized, two of them also being present in C. infundibuliformis . Chone ungavana and C. infundibuliformis have short radiolar tips, broad flanges and thoracic uncini distributed in two irregular rows in each torus. However, in C. ungavana the anterior peristomial ring lobe is exposed beyond the collar (not exposed in C. infundibuliformis ), and branchial lobes exposed beyond the collar (not exposed in C. infundibuliformis ). At this time it is not possible to recognize the validity of C. ungavana due to the dehydration of the only available material.