New Amphipod Crustaceans From The Indo-West Pacific (Amathillopsidae: Eusiridae: Iphimediidae) Author Lowry, J. K. Author Myers, A. A. text Raffles Bulletin of Zoology 2003 51 2 219 256 journal article 10.5281/zenodo.4619401 2345-7600 FF91FFEEFF9DDF128D2BFFDF5B78F067 4619401 Oradarea dawa , new species ( Figs. 1 , 5-8 ) Material examined. – Holotype – female, 1.5 mm , AM P46998, off Ilôt Maitre , New Caledonia , 22 19.61’S 166 24.07’E , Padina - type alga, 10.5 m , ORSTOM divers, coll. Georges Bargibant , 14 Nov.1995 , stn NCL-98. Paratypes – sex unknown, 8 specimens , same station data; 4 specimens , AM P48370, Thio , New Caledonia , Halimeda from fringing reef, 1 m , coll. A. A. Myers , 20 Nov.1995 , stn NCL-215 ; 10 specimens AM P46997, off Ilôt Maitre , New Caledonia , 22 19.61’S 166 24.07’E , Amansia , 10.5 m , ORSTOM divers, coll. Georges Bargibant , 14 Nov.1995 , stn NCL-96 ; 3 specimens AM P46993, off Ilôt Maitre , New Caledonia , 22 19.61’S 166 24.07’E , coralline algal “reef”, 10.5 m , ORSTOM divers, coll. Georges Bargibant , 14 Nov.1995 , stn NCL-99 ; 1 specimen AM P46991, off Ilôt Maitre , New Caledonia , 22 19.35’S 166 25.85’E , large hard coral block and coarse sand, some algae, 21 m , coll. J. K. Lowry , 10 Nov.1995 , stn NCL-64 ; 1 specimen , AM P46999, Baie de St. Marie , New Caledonia , 22 18.05’S 166 28.13’E , thick coral rubble, 13 m , coll. J. K. Lowry , 29 Nov.1995 , stn NCL-209 ; 1 specimen AM P46975, off Ilôt Maitre , New Caledonia , 22 20.57’S 166 25.43’E , red alga, 20 m , coll. I. Takeuchi , 7 Nov.1995 , stn NCL-38 ; 10 specimens AM P46994, off Ilôt Maitre , New Caledonia , 22 19.61’S 166 24.07’E , Amansia glomerata , 10.5 m , coll. J. K. Lowry , 14 Nov.1995 , stn NCL-94 . Type locality. – Off Ilôt Maitre, New Caledonia . Description. – Head laterocephalic lobes truncated, ventrolateral margin without spine; eye of medium size. Body without robust setae, without spines, without carina, with single, pleonites 1-2 with mid-dorsal processes; integumental scales present. Antenna 1 peduncle about as long as head; peduncular article 2 without sharp spines; accessory flagellum present, with 1 article. Mandible incisor transverse, broad, toothed, laminate; accessory setal row present; molar well developed, triturating; palp inserted medially, article 3 not exceptionally elongate. Labium outer lobes entire; inner lobes absent; mandibular processes long, subround distally. Maxilla 1 inner plate triangular, with setae along medial margin; palp not flabellate, well developed, 2-articulate, article 1 long. Maxilla 2 inner plate with oblique setal row. Maxilliped palp of moderate length, not strongly raptorial; palp 4-articulate, article 4 reduced; article 2 not produced. Pereon . Gnathopod 1 dissimilar to gnathopod 2, shorter to gnathopod 2, subchelate, not flagellate; coxa directed ventrally, ventrally truncated; ischium elongate; carpus not lobate; propodus subrectangular. Gnathopod 2 subchelate; coxa similar in length to coxa 1, ventrally truncated; ischium elongate; carpus long; not lobate along posterior margin of propodus; propodus narrow, rectilinear. Pereopods 3–7 merus posteroventral lobe slightly projecting along carpus. Pereopod 3 coxa ventrally truncated. Pereopods 4–5 coxae not forming ventral crescentic curve. Pereopods 4-6 coxa without ventral points. Fig. 5. Oradarea dawa , new species , female, 1.5 mm, AM P46998; off Ilôt Maitre, South-east Lagoon, New Caledonia. Fig. 6. Oradarea dawa , new species , female, 1.5 mm, AM P46998; off Ilôt Maitre, South-east Lagoon, New Caledonia. Scale bar = 0.1mm. Fig. 7. Oradarea dawa , new species , female, 1.5 mm, AM P46998; off Ilôt Maitre, South-east Lagoon, New Caledonia. Scale bar = 0.1mm. Pleon . Epimeron 3 without spines along posterior margin; posteroventral corner subquadrate. Telson emarginate, truncated, longer than broad, margins tapering distally, without dorsal robust setae. Remarks. – Oradarea dawa does not appear to be very closely related to its nearest tropical congener, O. shoemakeri Pirlot from Sulawesi . That species has a very long article 1 of antenna 1, strong lateral carinae on pleonites 1-3 and epimeron three with two teeth. In having pleonites 1-2 with dorsal tooth and pereonite 7 non-dentate, O. dawa is most similar to O. bidentata and O. ocellata from the Antarctic. It differs from O. bidentata in its truncated head lobes, in the short article 1 of antenna 1, and in its distally truncated telson. It differs from O. ocellata in the much broader basis of pereopods 5-7, which also have a more serrated posterior margin. and in the strong acute posteroventral tooth on epimera 1-3. Both O. bidentata ( 11 mm ) and O. ocellata ( 17 mm ) are much larger than O. dawa . Distribution. – New Caledonia . Etymology . Named for the French research vessel Dawa , from which this species was collected.