Terebellidae (Annelida, Terebelliformia) from Lizard Island, Great Barrier Reef, Australia Author Nogueira, João Miguel Matos Author Hutchings, Pat Author Carrerette, Orlemir text Zootaxa 2015 4019 1 484 576 journal article 10.11646/zootaxa.4019.1.18 17696c34-012b-4e06-bd03-8516d44a6814 1175-5326 289527 906BB67C-F137-4CDA-A26B-77A025725800 Lanice viridis n. sp. ( Figs 3 G–I, 55–59) Type material. Holotype : NTM W. 023148 , 14°44'37"S , 145°30'43"E , 5 m , incomplete, 12 mm long, ~ 1.5 mm wide. Paratype : AM W.44967, MI QLD 2436, mounted on SEM pin; AM W.47714, mounted on 2 SEM pins, AM W.44611, MI QLD 2400 (photographed alive); AM W.47791, MI QLD 2436; AM W.44281, MI QLD 2367 (2); AM W.47738, CReefs, LI–10–062, MacGillivray Reef, deep reef slope, 14°39'25"S , 145°28'22"E ; AM W.47739, CReefs, LI–10–009, MI QLD 2187, North Direction Island , 14°44'43"S , 145°30'18"E . Comparative material examined. Holotype of Lanice bidewa Hutchings & Glasby, 1988 , AM W. 200764 . Paratype of Lanice bidewa , AM W. 200687 . Holotype of Lanice sinata Hutchings & Glasby, 1990 , AM W.203513. Paratype of Lanice sinata , AM W.203514. Non-types of Lanice sinata , AM W.21846, AM W.21847, AM W.21851, AM W.21862, AM W.21866. Description. In life, bright green body, with buccal tentacles regularly striped with brown and white bands ( Fig. 3 G–I); brown spots on buccal tentacles frequently visible in preserved material. Transverse prostomium attached to dorsal surface of upper lip; basal part with few eyespots laterally; distal part shelf-like ( Figs 55 C, E–F, I–J, L; 56A, E, K). Buccal tentacles shorter than body, but longer than region with notopodia ( Fig. 3 G–I). Peristomium forming lips, hood-like upper lip, short, circular, densely ciliated; short and swollen lower lip, buttonlike ( Figs 55 A, G, K–L; 56A–B, E, G–I, K). Segment 1 dorsally narrow, with pair of large lobes directed anteriorly and reaching around 2/3 of upper lip length; lobes almost circular, with thinner membrane at tip ventrally, dorsal margins inserted at level of first pair of branchiae; lobes higher laterally to mouth, mid-ventrally indented to partially expose lower lip. Segment 2 reduced, dorsally conspicuous, covered by lobes of segment 3 laterally and fused to it ventrally. Segment 3 with pair of large, rectangular lobes, lateral and distal margins straight, rounded at corners, reaching around mid-length of lobes of segment 1 laterally; lobes with wide bases, ventral edges fused to upper corners of first mid-ventral shield, dorsal margins inserted at level between dorsal edges of neuropodia and line of notopodia; lobes absent from segment 4 ( Figs 3 I; 55A–G, I–L; 56A–B, D–E, G–H, J–K). Anterior segments slightly inflated dorsally. Paired dorso-lateral arborescent branchiae present on segments 2–4, dorsal to line of notopodia, with short branchial filaments branching dichotomously in several levels from secondary stems, and short basal stems; first pair slightly longer, about half body width at segment 2; branchiae inserted progressively more laterally ( Figs 3 G–I; 55B–C, E–G, I–J, L; 56A, C–F, J–L). Trapezoidal mid-ventral shields present from segments 2–14 or 15, those of segments 2–4 almost completely fused into single crenulated structure, following shields progressively smoother, slightly crenulate until last; blood red region on segments 12–15; first 2 shields, on segments 2–3 and 4, much wider than those of following segments, progressively narrowing until segment 10, then of uniform width, indented posteriorly by tori, last shield almost inconspicuous ( Figs 55 A–B, D, G, K; 56B, G–H). Notopodia beginning on segment 4, extending until segment 20; notopodia short, cylindrical to oblong, notopodia of segments 4–7 inserted progressively more laterally, then longitudinally aligned ( Figs 55 A–L; 56A–G, J–K, M; 57A–C). Narrowly-winged notochaetae in both rows throughout, under SEM wings with thin, smooth marginal blade, chaetae of posterior row with wings at distal half ( Figs 57 A–C, E–I; 59A–F). Neuropodia present from segment 5, as low, almost sessile ridges until termination of notopodia, as elongate and thin, rectangular pinnules from segment 21, inserted progressively more ventrally, lateral to mid-ventral groove on posterior segments ( Figs 55 A–E, G–K; 56A–B, D–E, G–H, J–K, M; 57D). Short-handled avicular uncini, arranged in partially intercalated to completely separate double rows, in back to back arrangement, from segment 11 until termination of notopodia, on segment 20; uncini with elongate base, almost inconspicuous dorsal button at mid-length of base, distally pointed prow curved downwards, and crest with 3 rows of secondary teeth, on segments of region with notopodia, 4 rows after notopodia terminate and 5 rows on posterior segments; stouter uncini on first 3 pairs of neuropodia, on segments 5–7, with more teeth per row, and typically 3 teeth on first row above main fang, middle tooth shorter, following segments with shorter and less teeth per row of secondary teeth ( Fig. 57 D); after notopodia terminate, uncini with more teeth per row of secondary teeth ( Figs 58 A–G; 59G–L). Nephridial papillae on segments 2 and 3, between dorsal margins of lobes and branchiae, on segment 3, minute genital papillae on segments 6–8, posterior to notopodia ( Figs 55 L; 56D–E, J–K, M). Pygidium unknown. Tube unknown. FIGURE 55. Lanice viridis n. sp. NTM W.023148: A–C. Incomplete worm, ventral, left ventro-lateral and right dorso-lateral views, respectively; D–G. Anterior end, ventral, right dorso-lateral (2) and left ventro-lateral views, respectively; H. Transition between anterior and posterior body; I–L. Close ups of the anterior end, right dorso-lateral (2), ventral and dorsal views, respectively; arrows point to nephridial papillae. Numbers refer to segments. Abbreviations: ll = lower lip, ul = upper lip, * = distal part of prostomium. Scale bars: A–C = 1 mm, D–H = 0.5 mm, I, K–L = 0.3 mm, J = 0.4 mm. FIGURE 56. Lanice viridis n. sp. AM W.44967: A–B. Incomplete worm, left lateral and ventral views, respectively; C–E. Anterior end, dorsal, right and left lateral views, respectively; F, J–K. Close ups of the anterior end, dorsal, right and left lateral views, respectively; G–I. Closer views of the anterior end, ventral view; L–M. Close ups of the branchiae and notopodia of segments 5–9, respectively. Numbers refer to segments. Abbreviations: ll = lower lip, P = prostomium, ul = upper lip. Scale bars: A–B = 0.5 mm, C–D = 0.4 mm, E = 0.15 mm, F–G, K = 0.2 mm, H, M = 0.1 mm, I = 70 µm, J = 0.3 mm, L = 20 µm. FIGURE 57. Lanice viridis n. sp. AM W.44967: A–C. Notochaetae, segments 6, 17, and 18, respectively; D. Close up of the neuropodia of segments 5–8; E–F. Notochaetae of segment 6, chaetae from anterior and posterior rows, respectively; G, I. Notochaetae of segment 18, chaetae from anterior and posterior rows, respectively; H. Notochaetae of posterior row, segment 17. Scale bars: A = 20 µm, B–C = 30 µm, D = 50 µm, E, G–H = 10 µm, F = 4 µm, I = 7 µm. Remarks. Lanice viridis n. sp. closely resembles L. bidewa Hutchings & Glasby, 1988 as both species lack lobes on segment 4, however members of L. bidewa have lobes of segment 3 with narrower bases, extending from the level of notopodia to mid-length of anterior neuropodial tori, while in L. viridis n. sp. the bases of lobes of segment 3 extend from near the level of notopodia to the mid-ventral shield. The tubes of the new species were not retained, so unknown if the opening to the tube is smooth as in L. bidewa , as often species in this genus have ornamented entrances to their tubes. Etymology. We name this species after the bright green colour of living specimens ( Fig. 3 G–I), from the Latin word “ viridis ” = green . Type locality. Off North Direction Island , near Lizard Island , GBR, Australia . Distribution. Known only from the Lizard Island region.