
Male
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Large black eyes apart and reniform. Length, 4 1/2 mm Rostrum reaching end of antenna 1 peduncle.
Antennae. First: Peduncle longer than flagellum; 3rd segment 2/3 length 2nd; 2nd 1/2 length and width of 1st; inferior margin of 1st strongly convex, area of fine bristle-setae and tufted setae inferodistally; 2 or 3 long setae on distal angles of 2nd; 3rd almost naked; flagellum of 5 segments each with seta or 2 superodistally, inferodistally 1 or 2 long setae plus long flaccid sensory seta and on some a calceolus; an extremely long, blunt-ended spine terminally; accessory of 3 distally setose segments, reaching main flagellum 3rd segment. Second: Peduncle, 3rd segment almost as long as 4th, strongly convex superiorly with distal area of fine bristle-setae; 4th with a few setae, tract of fine bristle-setae on superior margin, several strong spine-setae distally, 2 spines medially on surface, about 6 tufted sensory setae obliquely between them and inferoproximal angle, about 9 bifurcate-tipped spine-setae on rest of margin. Flagellum of 29 successively

Text-fig. 5.—Phoxocephalus regium Barnard. ♂. 73—Antenna 1. 74—Antenna 2. 75—Maxilla 1. 76—Maxilla 2. 77—Maxilliped, right side. 78—Mandible, spine row, molar process and cutting edge. 79—Mandibular palp. 80—Gnathopod 1. 81—Gnathopod 2. 82—Peraeopod 1. 83—Peraeopod 2 sideplate. 84—Peraeopod 3. 85—Peraeopod 4. 86—Peraeopod 5. 87—Pleopod coupling spines and accessory seta. 88—Uropod 1. 89—Uropod 2. 90—Uropod 3. 91—Telson.

longer and more slender segments, inferiorly naked, superodistally 1 or 2 setae, calceolus on 1st 4 and then alternate segments to 12th; last segment has long terminal seta.
Mouthparts. First Maxillae: Palp has 4 strong setae at end. Second Maxillae: Inner plate much the wider, 6 or 7 small plumose spines on inner margin; outer plate has about 6 plumose setae on end. Mandible: Cutting edge of 2 barely-toothed plates; spine row of 2 or 4 spines, numerous bristles; molar process with rounded, distally toothed face. Palp segments narrow; 1st segment short; 2nd barely longer than 3rd, about 5 long setae on inner margin distally, small seta proximally, 3rd very obliquely truncate, about 12 short and long setae on truncate end, single seta proximally on mid-surface. Maxilliped: Inner plate subrectangular, width 1/2 length, single seta on mid-surface about 3/4 along, 3 stout teeth on end margin; plate reaching 1/2 along outer plate, 1/3 along merus. Outer plate as narrow, distally blunt, reaching 2/3 along merus (outer margin), 2 single spines on inner margin at 1/3 and 2/3, 3 strong inwardly curved teeth on distal 1/3. Basos and merus inner distal angles with single spine, outer margins naked as in ischium, carpus and propod. Ischium outer margin as long as merus inner and 1/2 merus outer; carpus outer margin nearly as long as merus outer, more than 2/3 carpus inner, which is slightly longer than propod; carpus as wide as outer margin is long, convex inner margin with 14–15 spine-setae; propod inner margin has median convexity, 6 or 7 long spine-setae, outer distal angle has 2 or 3 more. Dactylos almost propod length, slender and curved, not greatly narrowing but setae and strong short nail on end.
Gnathopods. First: Sideplate width 3/4 depth, angles rounded especially anterior, proximally greatly narrowed, 6 or so long setae ventroproximally. Basos greatly constricted proximally, as long as sideplate, width less than 1/3 length. Ischium subrectangular, width 1/2 length, as long as basos is wide, seta at 2/3 posterior margin. Merus subtriangular, free slightly convex posterior margin 1/3 basos length, seta 3/4 along, width 1/2 length. Carpus anterior margin slightly convex, 1/2 basos length, posterior scooped out especially distally to take propod, 2 or 3 setae proximally, length little more than 1/2 anterior margin, proximal width twice distal width so carpus becomes a narrow stalk. Propod subrectangular, width 2/3 length, barely shorter than basos, posterior 3/4 of proximal margin free, posteroproximal angle rounded, palm slightly convex and oblique, small spines each side, defined by strong spine on posterodistal angle, small pocket inside it for tip of curved dactylos which is almost as long as propod is wide; 2 setae on propod posterior margin distally. Second: Sideplate subrectangular, width less than 1/3 length, 5 or 6 spine-setae ventro-posteriorly. Basos as long, width nearly 1/3 length, about 3 very long setae posteriorly. Ischium 1/4 basos length, almost as wide, 2 long spine-setae posterodistally, merus somewhat subtriangular, width 1/2 length, length 1/3 basos, posterior margin convex, spine-seta on angle, distal margin oblique to anterior which is 1/2 length posterior, forms base of scooped spoon-shaped carpus. Carpus 2/5 basos length, propod as before, anterior margin as long as basos, palm more oblique and convex, pocket more defined, stout posterodistal spine set back 1/2 its length from small produced blunt angle-tooth.
Peraeopods. First: Like Gn. 2 in 1st 3 segments. Merus nearly 3/4 basos length, slightly constricted proximally, anterodistal angle produced slightly above carpus with 2 or 3 long setae, 2 a little previously also; posterior with several long setae irregularly. Carpus ovate, length 1/3 basos, width 1/2 length, about 9

succeedingly longer spine-setae posteriorly with one stout seta-tipped spine as long as propod and 1/3 its width Propod barely longer than carpus and dactylos, linear, width about 1/3 length, 3 spine-setae distally, and posterior to dactylos a strong spine, almost dactylos length and 1/2 its width; single seta 1/2 along posterior margin. Dactylos slender, barely curved. Second: Sideplate posteriorly excavate, anterior margin straight, ventral rounding to oblique posterior, as wide as long but narrowing distally, excavation not deep Third: Sideplate lobes ovate, posterior nearly twice depth anterior Basos anterior margin barely concave, 3 long setae on distal angle, posterior a broad convex flange, narrowing more distally, almost as wide as long and produced down posteriorly to merus. Ischium subrectangular, barely wider than long, 2 long setae anterodistally. Merus posterior margin a little constricted proximally, width 2/3 length, length 2/5 basos; spine, long spine-seta and a few fine setae posterodistally, the angle slightly produced downwards, small spine plus spine-setae in 3 groups anteriorly. Carpus length twice width, nearly 1/2 basos length, posterior margin straight and naked, angle as in merus; anterior margin strongly indented for each of 3 groups of 1–3 spine-setae and 0–2 stout spines, spine-setae on distal angle Propod 1/2 to 1/3 carpus width, 3 spines just past 1/2 along, 5 spine-setae, some as long as slender dactylos distally, dactylos nearly 2/3 propod length Fourth: Basos ovate, anterior margin convex, posterior almost straight but produced as flange to merus, median width 2/3 length; anterior margin with a few setae on proximal 1/2, 8 oblique ranks of plumose setae increasing in number regularly from 1 to 8. Ischium subsquare, nearly 1/4 basos length, 3 or 4 plumose setae anterodistally. Merus width 2/5 length, length 3/5 basos, 4 small single or paired spines on anterior margin, 4 longer spines with 1 or 2 setae on slightly convex posterior margin Carpus slightly shorter and narrower, linear, short spine and long spine-setae at 2/3 and on distal angle of posterior margin, 3 groups of 3 slightly longer spines on anterior. Propod linear, width 1/5 length, almost as long as carpus, long seta 2/3 along posterior margin, short spine and stout dactylos-length spine-seta on angle; anterior margin has 3 spines at 2/3, longer spine on angle. Dactylos as before. Fifth: Basos strongly convex, posterior margin produced in great flange, widest about ischium level and reaching almost to carpus, deeper than remaining segments combined, 6 or 7 distinct minutely spined serrations posteriorly, indistinctly crenulate ventrally, as wide as length of straight anterior margin plus ischium, single spine on anterodistal angle, 2 on ischium angle. Ischium subsquare, 1/2 length merus, which is 1/3 basos anterior margin, width 1/2 length, has 3 spine-setae distally on straight posterior margin, 5 groups of 1 or 2 long plumose spine-setae on distal 1/2 of slightly curved serrate anterior margin. Carpus slightly narrower, as long, linear, anterior margin with 3 groups of 2–4 spine-setae; posterior straight, naked but for 3 long plumose spine-setae on angle. Propod linear, 3/4 carpus length, 1/2 its width, widest a little distally, 2 long spine-setae on each angle; dactylos arising anteriorly, as long as propod and about 1/3 width.
Epimeral Plates. Basically subrectangular, 1st only deeper than wide (in female more subtriangular); anterior angles rounded, posterior margins slightly convex, 3rd with 3 minute spines and indistinct serrations, no other spines or setae; 2nd with slightly oblique rank of about 6 long plumose setae across surface near anterodistal angle.
Pleopods Peduncle shorter than rami, stout, 2 simple hooked coupling spines and small plumose seta.

Uropods. First and Second: Peduncle and rami subequal, rami slender, naked except 1st uropod outer ramus which has 2 spines; 2 spines on each dorsal margin of 1st, 2 on outer and 3 on inner of 2nd. Third: Peduncle 1/2 length outer ramus, 4 or so spines on outer distal angle; rami plumose especially inner margin; 2nd segment of outer ramus a very strong spine, 1/3 1st segment length. Telson: Stout spine and small seta and plumose sensory seta on end of each lobe; 2 sensory setae at about 1/3.
