Ceradocus oxyodus Berents 1983
Creators: name: Krapp-Schickel, Traudl
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Maeridae
Ceradocus
Ceradocus oxyodus

description: <i>Ceradocus oxyodus</i> Berents, 1983 (Figs 5, 6) <i>Ceradocus oxyodus</i> Berents, 1983: 104, figs 3, 4. — Lowry &amp; Stoddart, 2003: 175. <b>Material examined.</b> 1 male, 7.5 mm (2 slides), AM P70991 (QLD 1693); 3 adults, AM P70742 (QLD 1645); 3 adults, AM P70757 (QLD 1645); 1 adult, AM P71048 (QLD 1706); 1 male, 2 juveniles, AM P71154 (QLD 1732). <b>Type locality.</b> Casuarina Beach, Lizard Island, Queensland, Australia (14 o 40.5’S 145 o 26.6’E). <b>Description.</b> Based on male, 7.5 mm, AM P70991. <b>Head.</b> <i>Head</i> subocular notch present. <i>Antenna 1</i> peduncular article 2 longer article 1, accessory flagellum with up to 3 articles. <i>Antenna 2</i> article 4 longer than article 5. <i>Mandible</i> palp article 1 distal acute prolongation, article 3 half length of article 2. <b>Pereon.</b> <i>Gnathopod 1</i> carpus subequal in length to propodus. <i>Gnathopod 2</i> symmetrical; propodus length more than 1.8 x width, palm oblique, no excavation or incision except a shallow one near corner. <i>Pereopod 7</i> basis posterior margin smooth, length equal to or greater than 1.8 x width. <b>Pleon.</b> <i>Pleonite 1</i> dorsally with medial gap and some lateral spines. <i>Pleonite 2</i> with very small medial spine, and additional small lateral ones. <i>Epimeron 1</i> posterior margin dorsally serrated, posteroventral margin unevenly incised, ventral margin smooth. <i>Epimeron 2</i> posterior margin dorsally serrated, posteroventral margin uneven, with tiny incisions. <i>Epimeron 3</i> dorsally serrated, posteroventral and ventral margins serrated. <i>Uropod 3</i> with many robust setae, external ramus short, less than 4x width. <i>Telson</i> with lateral setae and with 2–3 subdistal long robust setae on each lobe. <b>Female</b> (sexually dimorphic characters). Unknown. <b>Habitat.</b> Coarse sand, sand with mixed brown algae, patchy seagrass or blue-green algae, coral rubble, silty coarse sediment or soft bottom, crinoids, <i>Halimeda macroloba, Halimeda cylindracea, Caulerpa taxifolia, Gracilaria</i> sp., <i>Lobophora</i> sp., 3.5– 23 m. <b>Remarks.</b> Symmetrical second gnathopods occur in the following seven species: <i>Ceradocus breweri</i> (Kunkel 1910), <i>C. cotonensis</i> Appadoo &amp; Myers 2006, <i>C. dooliba</i> J.L. Barnard, 1972, <i>C. orchestiipes</i> Costa 1853, <i>C. rubromaculatus</i> (Stimpson, 1856), <i>C. sellickensis</i> Sheard, 1939 and <i>C. sheardi</i> Shoemaker 1948, as well as in <i>C. oxyodus</i>. In <i>C. rubromaculatus</i> the telsonic setation is stronger than that of <i>C. oxyodus</i>. This nominal species, <i>C. rubromaculatus</i>, varies a lot in different descriptions while the characters in the original description are rather sparse. Several species may hide under this name. <i>Ceradocus dooliba</i> is a much larger species (up to 23 mm) with a different dorsal serration-pattern to that of <i>C. oxyodus</i>. <i>Ceradocus cotonensis</i> Appadoo &amp; Myers, 2006, described from Rodriguez in the Indian Ocean, matches <i>C. oxyodus</i> in many respects, but the dorsal armament of the urosome of <i>C. cotonensis</i> has not been described. <b>Distribution.</b> <i>Australia</i>. Queensland: Lizard Island (Berents 1983, current study).
description: Published as part of <i>Krapp-Schickel, Traudl, 2009, Maeridae, the Ceradocus group *, pp. 598-642 in Zootaxa 2260 (1)</i> on pages 604-607, DOI: 10.11646/zootaxa.2260.1.32, http://zenodo.org/record/5309853
description: {"references": ["Berents, P. B. (1983) The Melitidae of Lizard Island and adjacent reefs, The Great Barrier Reef, Australia (Crustacea: Amphipoda). Records of the Australian Museum, 35, 101 - 143.", "Lowry, J. K. &amp; Stoddart, H. E. (2003) Crustacea: Malacostraca: Peracarida: Amphipoda, Cumacea, Mysidacea. Beesley, P. L. and Houston, W. W. K. Zoological Catalogue of Australia. 19.2 B, i - xii, 1 - 531. Melbourne, Australia, CSIRO Publishing.", "Appadoo, C. &amp; Myers, A. A. (2006) Melitids (Crustacea: Amphipoda) of the genera Ceradocus and Mallacoota from Rodrigues Island (Indian Ocean). Zootaxa, 1370, 1 - 22.", "Barnard, J. L. (1972) Gammaridean Amphipoda of Australia, Part I. Smithsonian Contributions to Zoology, 103, 1 - 333.", "Stimpson, W. (1856) Descriptions of some new marine Invertebrata. Proceedings of the Academy of Natural Sciences of Philadelphia, 7, 385 - 394.", "Sheard, K. (1939) Studies in Australian Gammaridea (1) The genus Ceradocus. Records of the South Australian Museum, 6, 275 - 295."]}