Laonice weddellia Hartman 1978

• Main Authors: Greaves, Elizabeth, Wilson, Robin
• Format: Other/Unknown Material
• Language: unknown
• Published: 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Spionida; Spionidae; Laonice; Laonice weddellia; Scotia Sea; Indian; Antarc*; Antarctica
• Online Access: https://zenodo.org/record/6183525; https://doi.org/10.5281/zenodo.6183525

Laonice cf. weddellia Hartman, 1978 Figures 10–11 Material examined. Australia: Indian Ocean, Point Hiller region, L 16 400, Stn SS07/ 2005 166, 35º 22.85 ʹ S, 117 º 13.267 ʹ E, 8 Jan 2005, 436 m, 1 specimen, MV F 167421; Indian Ocean, Bald Island region, T 7 400, Stn SS07/ 2005 199, 35º 12.55 ʹ S, 118 º 39.533 ʹ E, 10 Jan 2005, 414 m, 1 specimen, MV F 158703. Additional material examined. Laonice weddellia Hartman, 1978: Antarctica: Scotia Sea, cruise ANT 68 / 1 Walther Herwig, Stn 149, 61°09.0ʹ S, 56 °07.2ʹ W, 24 Feb 1985, 208 m, box corer, 9 specimens, ZMH P- 20854; Stn 149, 60° 57.1 ʹ S, 55 ° 55.2 ʹ W, 25 Feb 1985, 246 m, box corer, 20 specimens, ZMH P- 20856; Stn 137, 61° 18.5 ʹ S, 54 ° 40.3 ʹ W, 21 Jan 1985, 370 m, box corer, 10 specimens, ZMH P- 20850. Description. (based on Western Australian specimens of Laonice cf. weddellia). Two anterior fragments, 36 and 25 chaetigers respectively, 4.3–12 mm long, 1–1.5 mm wide. Prostomium bell-shaped, anteriorly rounded, extending posteriorly to between chaetiger 1–2. Occipital antenna present, short; arising from posterior part of prostomium, well behind eyes. Eyes present, one or three pairs; specimen with three has one anterior pair, close to edge of prostomium and relatively deeply set, second and third pairs more posterior and close together, such that on one side two eyes appear almost as one; specimen with only one pair, eyes at posterior end of prostomium and potentially composed of two closely set pairs. Peristomium separate from prostomium, well developed. Palps lost from both specimens. Nuchal organ present, extending posteriorly until approximately chaetiger 13 (difficult to determine as specimen somewhat damaged) (Fig. 10 A). Branchiae from chaetiger 2, continuing until end of fragments; initially short, similar length to notopodial lobe, approximately twice lobe length by about chaetiger 12, by end of longest fragment only just reaching beyond the lobe. Chaetiger 1 notopodial lobes significantly smaller than those of chaetiger 2. Notopodial lobes ...