Normanion whoi Stoddart &amp; Lowry 2010, sp. nov.
Creators: name: Stoddart, H. E.
name: Lowry, J. K.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Opisidae
Normanion
Normanion whoi

description: <i>Normanion whoi</i> sp. nov. (Figs 3, 4) <b>Type material</b>. HOLOTYPE, female, 3.2 mm, MV J61508, south of Point Hicks, Victoria, Australia, 38°17.70'S 149°11.30'E, 400 m, coarse sand, gravel and mud with many sponges, WHOI epibenthic sled, 24 July 1986, M.F. Gomon <i>et al.</i>, RV <i>Franklin</i>, stn SLOPE 40. PARATYPES: 1 female, MV J14615 and 2 females, AM P.81162, same data as holotype; 1 female, MV J61509, off Freycinet Peninsula, Tasmania, Australia, 41°58.60'S 148°38.80'E, 500 m, coarse shell, WHOI epibenthic sled, 27 July 1986, M.F. Gomon <i>et al.</i>, RV <i>Franklin</i>, stn SLOPE 47. <b>Type locality</b>. South of Point Hicks, Victoria, Australia, 38°17.70'S 149°11.30'E, 400 m depth. <b>Etymology</b>. The species is named for the epibenthic sled, WHOI, developed at the Woods Hole Oceanographic Institute, Massachusetts, USA. <b>Diagnostic description</b>. <i>Antenna 1</i> callynophore present. <i>Eyes</i> present. <i>Mouthpart bundle</i> subconical. <i>Mandible</i> left incisor with strongly convex margin, smooth, right with slightly convex margin, smooth; lacinia mobilis absent; molar present, setose; palp attached midway, article 2 longer than article 3. <i>Maxilla 1</i> outer plate with 11 setal teeth in an 8/3 crown arrangement, outer row with cusps in 1 row; palp apical margin serrate, with apical robust setae. <i>Maxilliped</i> palp 4-articulate, article 4 vestigial. <i>Gnathopod 1</i> weakly chelate; ischium long; carpus posterior margin not produced, curved; propodus subovate, proximal margin produced into strong posteroproximal lobe, palm serrate, posterodistal corner produced into a short acute spine with 3 robust setae. <i>Gnathopod 2</i> minutely chelate; carpus longer than propodus (about 1.5x); palm obtuse. <i>Pereopod 4</i> coxa posteroproximal excavation large. <i>Pereopods 5–7</i> basis with smooth posterior margin; [dactylus not known]. <i>Epimeron 3</i> posterior margin smooth, posteroventral corner broadly rounded. [<i>Uropod 3</i> unknown.] <i>Telson</i> about as long as broad, entire, distally emarginate, without dorsal robust setae. <b>Male</b> not known. <b>Remarks</b>. Unfortunately all specimens lack the distal articles of pereopods 5–7 and uropod 3. <i>Normanion whoi</i> is similar to <i>N. amblyops, N. abyssi</i> and <i>N. hipposideros</i> in having a vestigial article 4 on the maxillipedal palp. It differs from <i>N. amblyops</i> and <i>N. abyssi</i> in its strongly serrate gnathopod 1 palm and from <i>N. hipposideros</i> in having 11 setal teeth on maxilla 1 outer plate, each with only one set of cusps, and a weakly chelate gnathopod 1. It is interesting to note that the female MV J14615 has the right gnathopod 1 extended and rotated between merus and carpus so that the propodus is inverted as in species of <i>Trischizostoma</i> which are parasitic on fishes. The left gnathopod 1 is tucked in under the coxae and is not inverted. <b>Distribution</b>. South-eastern Australia; 400–500 m depth.
description: Published as part of <i>Stoddart, H. E. &amp; Lowry, J. K., 2010, The family Opisidae (Crustacea: Amphipoda: Lysianassoidea) in Australasian waters, pp. 22-38 in Zootaxa 2479 (1)</i> on pages 27-28, DOI: 10.11646/zootaxa.2634.1.5