Leitoscoloplos mawsoni Benham 1921

• Main Author: Blake, James A.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Annelida; Polychaeta; Orbiniidae; Leitoscoloplos; Leitoscoloplos mawsoni; Antarctic; Boat Harbor; Brown Bay; Casey Station; Commonwealth Bay; McIntosh; Vincennes Bay; Wilkes Land; Adelie Land; Antarc*; Antarctica; Australian Antarctic Division
• Online Access: https://zenodo.org/record/4901753; https://doi.org/10.5281/zenodo.4901753

Leitoscoloplos mawsoni (Benham, 1921) Figure 11 Scoloplos kerguelensis: Willey 1902: 275; Monro 1939: 124 (in part). Not McIntosh 1885. Scoloplos mawsoni Benham, 1921: 78 –81, pl. 9, figs. 91–94. Leitoscoloplos mawsoni: Mackie 1987: 5 –7, fig. 4. Material examined. Antarctica: Adelie Land, Commonwealth Bay, Boat Harbor, 67°00′S, 142°36′E, 8 m, coll. J. Haswell, 15 Oct 1912, 55 syntypes (AM W769).— Wilkes Land, Vincennes Bay, Casey Station, coll. Australian Antarctic Division, Brown Bay, middle, Sta. S1P1R1, 0 4 Dec 2005, 66.272°S, 110.567°E, diver cores, 15–25 m, (50, including 15 juveniles, AM); O’Brien Bay-1, T2P1R2, 14 Dec 2006, 66.312°S; 110.515°E, diver cores, 12–25 m, (24, AM); Wilkes Bay, Sta. S 2P1R3, 15 Dec 2005, 66.526°S; 110.526°E, diver cores, 10–20 m, (26, including 10 juveniles, AM); Sta. S1P2R3, 15 Dec 2005, 66.526°S; 110.526°E, diver cores, 10–20 m, (44, AM). Description. A moderate-sized species, syntypes up to 32 mm long, 1.5 mm wide for about 100 setigers; other specimens with similar maximal measurements. Color in alcohol: light tan; large specimens from Casey Station S1P1R1 with dusky dark pigment on prostomium, peristomium, and first 3–4 setigers, most intense on prostomium and anterior peristomium. Thoracic region inflated, not depressed, with 10 setigers, wider than abdominal segments. Prostomium short, conical, rounded or blunted on tip, not acute (Fig. 11A); two nuchal slits sometimes apparent in dorsolateral locations; without eyespots. Peristomium a single achaetous ring, tapering anteriorly, about one-fourth longer than first setiger (Fig. 11A). Thoracic parapodia similar, inconspicuous, with short postsetal lobes with rounded tips increasing in size along thorax (Fig. 11A); notopodial lobes elongated, oval-shaped; neuropodial lobes more triangular, but with rounded, not pointed tips (Fig. 11B). Abdominal notopodial postsetal lobes short, blunt slightly asymmetrical in anterior segments (Fig. 11C), becoming longer, more symmetrical, somewhat triangular posteriorly (Fig. 11D); ...