Dulichiella pacifica Lowry &amp; Springthorpe 2005
Creators: name: Lowry, J. K.
name: Springthorpe, R. T.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Melitidae
Dulichiella
Dulichiella pacifica

description: <i>Dulichiella pacifica</i> Lowry &amp; Springthorpe, 2005 (Figs 2, 3) <i>Dulichiella appendiculata</i>. –– Berents, 1983: 111, fig. 9. –– Ledoyer, 1984: 64. –– Ledoyer, 1986: 187, fig. 9 N Cal. <i>Dulichiella pacifica</i>. –– Lowry &amp; Springthorpe, 2005: 292, figs 54–57. –– Lowry &amp; Springthorpe, 2007: 40, figs 30–32. <b>Material examined.</b> 1 specimen, AM P30123 (75 LIZ D-1); 6 specimens, AM P30124 (QLD 2); 1 specimen, AM P77738 (QLD 21); 5 specimens, AM P30125 (QLD 27); 2 specimens, AM P30126 (QLD 28); 1 specimen, AM P77739 (QLD 57); 1 specimen, AM P70836 (QLD 1661); 1 specimen, AM P70920 (QLD 1682); 2 specimens, AM P70921 (QLD 1686); 1 specimen, AM P70916 (QLD 1691); 6 specimens, AM P70946 (QLD 1696); 1 specimen, AM P71005 (QLD 1707); 2 specimens, AM P71950 (QLD 1707); 1 female, 6.1 mm, AM P75510 (QLD 1707); 8 specimens, AM P71105 (QLD 1710); 3 specimens, AM P71051 (QLD 1718); 1 specimen, AM P71129 (QLD 1750); 1 specimen, AM P71214 (QLD 1760); 1 specimen, AM P71224 (QLD 1760); 7 specimens, AM P71231 (QLD 1760); 2 specimens, AM P71364 (QLD 1800); 1 male, 5.2 mm, AM P75509 (QLD 1800); 5 specimens, AM P71355 (QLD 1803); 4 specimens, AM P71543 (QLD 1823); 1 specimen, AM P71600 (QLD 1838); 3 specimens, AM P75618 (QLD 1940); 3 specimens, AM P75705 (QLD 1940); 1 specimen, AM P75619 (QLD 1970); 2 specimens, AM P75704 (QLD 1970); male, 3.9 mm, AM P77740 (QLD 1970). <b>Type locality.</b> Coral rubble between Tandai Point and Koilo Point, Guadalcanal, Solomon Islands (9°22.5'S 159°52.2'E). <b>Description.</b> Based on male, 5.2 mm, AM P75509 and male, 3.9 mm, AM P77740.. <b>Head and body.</b> <i>Body</i> small. <i>Head</i> eyes round; lateral cephalic lobe broad, truncated, anteroventral corner with slender seta. <i>Antenna 1</i> peduncular article 1 shorter than article 2, with 3 robust setae along posterior margin. <i>Antenna 2</i> peduncular article 2 cone gland reaching at least to end of peduncular article 3; article 4 subequal to article 5. <i>Mandible</i> palp article 1 about as long as broad, inner margin produced distally; article 2 subequal to article 3. <b>Pereon.</b> <i>Gnathopod 1</i> coxa anteroventral corner not produced, anterior margin straight, posteroventral corner notch present; carpus subequal in length to propodus; propodus small, linear, palm convex, without posterodistal corner, with posterodistal robust setae. <i>Gnathopod 2</i> asymmetrical (larger) chelate, coxa posteroventral corner notch present; propodus distolateral crown with 4 rounded or subacute spines, fourth spine well developed, palm straight, posterodistal corner produced, upturned, dactylus fitting into corner; dactylus apically blunt; (smaller) subchelate, merus with sharp posteroventral spine; palm convex, without robust setae, posterodistal corner with robust setae; dactylus with 1 or 2 setae on anterior margin. <i>Pereopod 5</i> dactylar unguis anterior margin with accessory spine. <i>Pereopods 6-7</i> carpus and propodus with bunches of long slender setae. <i>Pereopod 6</i> basis posterior margin slightly concave; dactylar unguis anterior margin with one accessory spine. <i>Pereopod 7</i> basis posterior margin straight. <b>Pleon.</b> <i>Pleonite/urosomite</i> dorsal spine formula (7-7-7-5-4/6-2). <i>Pleonites 1–3</i> with sparse dorsal setae. <i>Epimeron 1</i> posteroventral corner with small acute spine. <i>Epimeron 2</i> posteroventral corner acute. <i>Epimeron 3</i> posteroventral margin smooth. <i>Urosomite 1</i> with 5 dorsal spines. <i>Urosomite 2</i> with two groups of 1–3 small dorsolateral robust setae. <i>Urosomite 3</i> without dorsal setae, with 2 dorsal spines. <i>Uropod 3</i> outer ramus very long, about 2 x peduncle. <i>Telson</i> with dorsal robust setae. <b>Female</b> (sexually dimorphic characters). Based on female, 6.1 mm, AM P75510. <i>Gnathopod 2</i> symmetrical, subchelate, subequal in size, similar to smaller gnathopod 2 of male; palm concave; dactylus posterior margin smooth, with 5 setae on anterior margin. <i>Pereopod 7</i> basis expanded, posterior margin convex and tapering distally. <b>Habitat.</b> Marine epibenthic, living among coral rubble, sponges, sand and low algal turf in 10 to 20 m depth. <b>Remarks.</b> <i>Dulichiella pacifica</i> has four spines on the distolateral crown of male gnathopod 2 and a 7-7-7- 5-4/6-2 pleonite/urosomite formula. Four other species share these characters: <i>D. appendiculata</i>; <i>D. fresnelii</i>; <i>D. lecroyae</i>; and <i>D. cuvettensis</i>. <i>Dulichiella pacifica</i> is most similar to <i>D. cuvettensis</i> and <i>D. fresnelii</i>. It differs from <i>D. cuvettensis</i> in having one accessory spine on the dactyli of pereopods 5 to 7 (two accessory spines in <i>D. cuvettensis</i>) and in having bunches of long, slender setae on the carpus and propodus of male pereopods 6 and 7 which are absent in <i>D. cuvettensis</i>. <i>Dulichiella pacifica</i> differs from <i>D. fresnelii</i> in the posterior margin of the basis of pereopod 6 which is concave in <i>D. pacifica</i> and straight in <i>D. fresnelii</i> and in the posterior margin of the basis of pereopod 7 which is straight in <i>D. pacifica</i> and tapering distally in <i>D. fresnelii</i>. <i>Dulichiella pacifica</i> is a common shallow-water species in Singapore, New Guinea, New Caledonia, the Solomon Islands and north-eastern Australia. <i>Dulichiella</i> has not been reported from Micronesia (J.L. Barnard 1965) or Fiji (Myers 1985). On the Great Barrier Reef <i>D. pacifica</i> occurs from Yonge Reef in the north to One Tree Island near the southern end. <b>Distribution.</b> <i>Australia</i>. Queensland: Yonge Reef; Lizard Island; One Tree Island (current study, Lowry &amp; Springthorpe 2005). <i>Singapore</i> (Lowry &amp; Springthorpe 2005). <i>Papua New Guinea</i>. Madang Lagoon (Lowry &amp; Springthorpe 2005). <i>Solomon Islands</i>. Guadalcanal (Lowry &amp; Springthorpe 2005). <i>New Caledonia</i>: Poé Plage, West Lagoon; Thio, East Lagoon; Southwest Lagoon (Lowry &amp; Springthorpe 2005).
description: Published as part of <i>Lowry, J. K. &amp; Springthorpe, R. T., 2009, Melitidae, the Melita group *, pp. 718-735 in Zootaxa 2260 (1)</i> on pages 720-723, DOI: 10.11646/zootaxa.2260.1.37, http://zenodo.org/record/5304981
description: {"references": ["Lowry, J. K. &amp; R. T. Springthorpe (2005) New and little-known melitid amphipods from Australian waters (Crustacea: Amphipoda: Melitidae). Records of the Australian M useum, 57 (2), 237 - 302.", "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.", "Ledoyer, M. (1984) Les gammariens (Crustacea, Amphipoda) des herbiers de phanerogames marines de Nouvelle Caledonie (region de Noumea). Memoires du Museum National d'Histoire Naturelle, Series A, Zoology ,, 129, 1 - 113.", "Ledoyer, M. (1986) Crustaces Amphipodes Gammariens. Familles des Haustoriidae a Vitjazianidae. Faune de Madagascar, 59 (2), 599 - 1112.", "Lowry, J. K. &amp; Springthorpe, R. T. (2007) A revision of the tropical / temperate amphipod genus Dulichiella Stout, 1912, and the description of a new Atlantic genus Verdeia gen. nov. (Crustacea: Amphipoda: Melitidae). Zootaxa, 1424, 1 - 62.", "Barnard, J. L. (1965) Marine Amphipoda of atolls in Micronesia. Proceedings of the United States National Museum, 117, 459 - 551.", "Myers, A. A. (1985) Shallow-water, coral reef and mangrove Amphipoda (Gammaridea) of Fiji. Records of the Australian Museum, Supplement, 5, 1 - 143."]}