Taxonomy of Serpulidae (Annelida, Polychaeta): The state of affairs Author Ten Hove, Harry A. Author Kupriyanova, Elena K. text Zootaxa 2009 2009-03-16 2036 1 126 journal article 1175­5334 15888B41-A000-4611-BEC8-F9359D1149CD 46. Vitreotubus Zibrowius, 1979b ( Fig. 50 ) Type-species : Vitreotubus digeronimoi Zibrowius, 1979b Number of species: 1 FIGURE 50. SEM micrographs of chaetae in Vitreotubus digeronimoi . Indian Ocean, East Amsterdam Island, 37°47.20' N, 77°38.98' E, 1680-940 m, R/V “ Marion Dufresne ” cruise MD 50, don. & det. Zibrowius, ZMA V.Pol. 3907. A—chaetae of 7 th thoracic bundle, two sizes, B— Spirobranchus collar chaeta, C—middle abdominal uncini, D—posterior abdominal uncini, E—abdominal chaeta with a hollow tip. Tube entirely vitreous, more or less quadrangular in cross-section by its two ample undulating lateral keels, and with a dorsal row of teeth. Granular overlay absent. Operculum inverse conical with chitinous diabololike endplate. Peduncle smooth, cylindrical, merging gradually into operculum, without wings, inserted as first radiole (at base of left branchial lobe, in line with first radiole). Pseudoperculum absent. Arrangement of radioles short pectinate, up to 11 per lobe. Inter-radiolar membrane and stylodes absent. Branchial eyes not observed. Mouth palps present. 7 thoracic chaetigerous segments. Collar trilobed. Medial lobe of collar with scalloped edge and lateral projections, separated from lateral lobes by deep incision (tonguelets absent), latter continuous with thoracic membranes extending all along the thorax, but narrow in the posterior segments, forming ventral apron. Collar chaetae Spirobranchus - type ( Fig. 50B ) and simple limbate. Apomatus chaetae absent. Thoracic uncini saw-shaped with 6–7 teeth above pointed fang. Triangular depression present. Abdominal chaetae true trumpet-shaped, with two rows of pointed teeth bordering hollow groove and extended into a long lateral spine ( Fig. 50E ). Abdominal uncini saw-shaped with about 6 teeth anteriorly ( Fig. 50C ), rasp-shaped with about 10 teeth in profile, 3–4 teeth in a row posteriorly ( Fig. 50D ). Achaetous anterior abdominal zone absent. Posterior capillary chaetae absent, but geniculate chaetae long at the end of abdomen. Posterior glandular pad absent. FIGURE 51. Drawings of serpulids redescribed herein. Chitinopomoides wilsoni, USNM 51505. A—tube, B–D—opercula, B–C—lateral and dorsal view of same specimen, D—lateral view of second specimen. Paumotella takemoana , holotype. E—lateral view of operculum, peduncle and its insertion. Remarks. The monotypic genus was originally described from fossil records and Recent material from the bathyal zone of the Azores and the Indian Ocean ( Zibrowius, 1979b ), more recent records are given by ten Hove (1994). It has a very characteristically shaped transparent tube. Vitreotubus digeromimoi Zibrowius, 1979b , Central Atlantic, Indian Ocean; bathyal.