Orbinia hartmanae Day 1977
Orbinia hartmanae Day, 1977 Figure 18 Orbinia hartmanae Day, 1977: 233–234, fig. 2j–n. Material examined. New South Wales : 2.5 km east of Little Bay, 33°58’55”S, 151°16’28”E, 16.05.1972, depth 51 m, coll. Australian Museum Shelf Benthic Survey, AM W.6474, Holotype; east of Malabar, 33°58’34”S, 151°...
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| Format: | Other/Unknown Material |
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Zenodo
2020
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| Online Access: | https://doi.org/10.5281/zenodo.4414230 http://treatment.plazi.org/id/03A787FE3B700852ABBFFCC8FECD46C1 |
| Summary: | Orbinia hartmanae Day, 1977 Figure 18 Orbinia hartmanae Day, 1977: 233–234, fig. 2j–n. Material examined. New South Wales : 2.5 km east of Little Bay, 33°58’55”S, 151°16’28”E, 16.05.1972, depth 51 m, coll. Australian Museum Shelf Benthic Survey, AM W.6474, Holotype; east of Malabar, 33°58’34”S, 151°16’52” E, 31.07.1989, depth 60 m, sand, coll. Fisheries Research Institute (NSW), AM W.24304, 6 specimens. Queensland : Middle Banks, Moreton Bay, 27°13’S, 153°19’E, March 1974, depth 10–37 m, coll. W. Stephenson, AM W.7357, Paratype, 1 specimen. Western Australia : Penguin Island, 32°18’S, 115°41’E, 25.01.2000, depth 1 m, sand, coll. M. Costello, AM W.27478, 2 specimens. Type locality. East of Little Bay, New South Wales. Description . Small worms, thoracic width up to 1.3 mm (0.9 mm in holotype). Thorax swollen in anterior part, flattened in posterior part, abdomen cylindrical (Fig. 18A). Prostomium sharply conical with long, thin tapering tip (Fig. 18B, C). Thoracic chaetigers numbering 15–21 (Fig. 18A). Branchiae from chaetiger 9–10, triangular with tapering tips, becoming asymmetrical in abdomen (Fig. 18B, C, E, G, I). Thoracic postchaetal notopodial lobes developed from first chaetiger, digitate, increasing in size along thorax; in abdomen becoming narrow foliaceous, shorter than branchiae (Fig. 18B, C, E, G, I, J). Thoracic neuropodia postchaetal lobes as ridges with one papillae (mammiform) on most thoracic chaetigers, in last 4–8 chaetiger becoming bilobed, with two podal papillae (Fig. 18A, B, D, E, H). Subpodal papillae present on posterior thoracic and anterior abdominal chaetigers; in total, about 10–11 chaetigers with subpodal papillae, with up to 10 papillae per segment; their number increasing with size of worm (Fig. 18D, E, F, I, J); 1–3 stomach papillae present on two anterior abdominal chaetigers, in larger worms also in last thoracic chaetiger (Fig. 18D, F). Interramal cirrus well developed in anterior abdominal chaetigers, reaching almost same length as notopodia, also present in posterior ... |
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