The Marine Fauna of New Zealand: Isopoda, Aegidae (Crustacea)

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with a distinct median point, pleonite 5 with a distinct median point or in the ovigerous female a short dorsally directed spine, slender dactylus on pereopods –3, slender distal articles on pereopods 5–7, all pereopods having few and small robust setae, the broadly rounded pleotelson posterior margin and the broadly rounded uropodal rami. No other species has an acute median point or dorsally directed spine on the posterior margin of pleonite 5. Nunomura ( 98 ), when describing Syscenus pacificus clearly believed that he was describing the second species of the genus, stating that ‘the genus Syscenus had hitherto been represented by the single species S. infelix’. Bruce ( 997a) questioned the validity of S. pacificus. Examination of the type material of Syscenus latus, also from Japan, and comparison with the description given by Nunomura ( 98 ) now confirm the synonymy. The large female is designated as lectotype. The smaller of the two syntypic specimens, both from the same locality, is in poor condition, with the posterior half appearing decomposed, and remains as paralectotype. While pleonite 5 has a short spine and the frons, antennule, pleotelson and uropods are similar to those of the larger specimen, the antennal flagellum is shorter in length, extending to pereonite 4 (rather than 6). prey: Not known. distribution: In New Zealand known only from the single specimen from the Challenger Plateau to the west of northern North Island; here also recorded from New Caledonia, Lord Howe Rise and the Banda Sea, Indonesia; previous records from Japan; at depths of 688– 056 metres (all records). Syscenus moana Bruce, 2005 (Fig. 35) Syscenus moana Bruce, 2005: 32, figs 1–4. diagnosis (from Bruce 2005): Body 2.7 times as long as greatest width. Rostrum anteriorly narrow, anteriorly truncate in dorsal view (apically bent ventrally). Eyes absent. Coxae 2 and 3 each with posteroventral angle with small distinct produced point; 5–7 without oblique carina. Pleonite 4 with posterolateral margins not extending to posterior margin of pleonite 5; pleonite 5 with posterolateral angles acute. Pleotelson 0.9 times as long as anterior width, anterior dorsal surface without 2 sub-median depressions; lateral margins convex, posterior margin evenly rounded, without RS. Antennule flagellum with 8 articles, extending to anterior of pereonite . Antenna flagellum with 32 articles, extending to middle of pereonite 6. Frontal lamina wider than long, anteriorly acute. 206 Pereopod 1 basis 2. times as long as greatest width; ischium 0.5 times as long as basis, inferior margin without RS, superior distal margin with 2 simple setae; merus inferior margin without RS, superior distal angle with simple setae; carpus .0 as long as merus, inferior margin without RS; propodus .3 times as long as proximal width, propodal palm simple, without blade or process, without setae, inferior margin without RS; dactylus .8 times as long as propodus. Pereopod 7 basis 2.7 times as long as greatest width, inferior margins with 2 palmate setae; ischium 0.9 as long as basis, inferior margin without RS, superior distal angle with RS, inferior distal angle with 5 RS; merus 0.6 times as long as ischium, 2.0 as long as wide, inferior margin with 8 RS (set as 2, 2, 2, and ), superior distal angle with 9 RS, inferior distal angle with 6 RS; carpus 0.8 times as long as ischium, 3.0 as long as wide, inferior margin with 8 RS (set as 2, , 2, , and ), superior distal angle with 20 RS, inferior distal angle with 5 RS; propodus .0 as long as ischium, 5.7 times as long as wide, inferior margin with 3 RS (very small, submarginal), superior distal angle with 3 slender setae (plumose), inferior distal angle with RS. Pereopods distal margins of ischium to carpus without abundant simple setae; without strong carina on basis. Penes opening flush with surface of sternite 7. Pleopod 1 exopod 2.0 as long as wide, lateral margin straight, mesial margin strongly convex, with PMS on distal one-third; endopod 2.5 times as long as wide, lateral margin weakly convex, with PMS on distal margin only, mesial margin with PMS on distal three-quarters. Pleopod 2 appendix masculina with straight margins, 0.5 times as long as endopod, distally bluntly rounded. Uropod peduncle ventrolateral margin with RS, posterior lobe absent. Uropod rami with endopod and exopod co-planar, rami extending beyond pleotelson. Endopod lateral margin weakly convex, distolateral margin with 3 RS, mesial margin straight, without RS. Exopod not extending to end of endopod, 3.9 times as long as greatest width; lateral margin convex, with 8 RS; mesial margin evenly concave, without RS; distal margin rounded. remarks: Syscenus moana can be recognised by the acute coxae, antennal flagellum extending to pereonite 6 (not pereonite 3 as stated incorrectly in the original description), rounded margin to the pleotelson and uropods with robust setae. distribution: Single record from northern Norfolk Ridge. Species of Syscenus are mesopelagic fish predators or parasites, and it is quite likely that this species will occur more widely in northern New Zealand waters.
Figure 135. Syscenus moana Bruce, 2005. A, dorsal view; B, head, dorsal view; C, frons; D, pleotelson and uropods, dorsal view; E, antennule; pereopod ; F, pereopod ; G, uropod. 207
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NATIONAL INSTITUTE OF WATER AND ATM
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NATIONAL INSTITUTE OF WATER AND ATM
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cONtENts ABSTRACT .................
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The isopod fauna of New Zealand has
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mAtErIAl ExAmINEd Material examined
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end on preservation, rendering appa
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Figure 3. Terms used in description
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y the fact that while some species
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Figure 4. Clades in Aega: Strict co
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parallel lateral margins (Ch 28.2)
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CharaCter List for AegA body charac
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Traditionally the Aegidae have been
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subOrdEr cymOthOIdA wägElE, 1989 B
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3. Body dorsally compressed; fronta
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Figure 8. Aega falklandica Kussakin
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Figure 10. Aega falklandica Kussaki
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Figure 11. Aega falklandica Kussaki
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Figure 12. Aega komai Bruce, 996. N
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size: Female 26 mm, two males 6.5 a
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Figure 15. Aega monophthalma Johnst
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Figure 19. Aega semicarinata Miers,
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Figure 21. Aega semicarinata Miers,
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pod 2.2 times as long as wide, dist
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Figure 23. Aega stevelowei sp. nov.
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Figure 25. Aega stevelowei sp. nov.
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4 teeth), lateral margin straight,
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Figure 28. Aega urotoma Barnard, 9
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Figure 30. Aega urotoma Barnard, 9
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Aega whanui sp. nov. (Figs 3 -33) m
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Figure 32. Aega whanui sp. nov. Hol
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distribution: Lord Howe Rise to the
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Figure 34. Aegapheles alazon (Bruce
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Figure 35. Aegapheles birubi (Bruce
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Figure 36. Aegapheles copidis sp. n
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Variation: The left and right uropo
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endopod. Uropod rami with apices br
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Figure 40. Aegapheles mahana sp. no
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teral margin not digitate; endopods
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tenna peduncle article 2 inferior s
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as ischium, .8 times as long as wid
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Aegiochus beri (Bruce, 983), comb.
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Figure 45. Aegiochus beri (Bruce, 1
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Figure 46. Aegiochus bertrandi sp.
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Figure 48. Aegiochus bertrandi sp.
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Aegiochus coroo (Bruce, 983), comb.
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Figure 50. Aegiochus coroo (Bruce,
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size: Males 8.5- 3.0 mm (mean = .4,
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Figure 53. Aegiochus gordoni sp. no
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Figure 55. Aegiochus gordoni sp. no
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New figures of the holotypes of Aeg
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Figure 57. Aegiochus insomnis sp. n
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Figure 59. Aegiochus insomnis sp. n
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distribution: Known only from the P
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Figure 62. Aegiochus kakai sp. nov.
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Figure 64. Aegiochus kakai sp. nov.
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Figure 65. Aegiochus kanohi sp. nov
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Figure 67. Aegiochus kanohi sp. nov
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of ischium-carpus with short RS. Pe
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Figure 69. Aegiochus laevis (Studer
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southwestern or western Pacific; re
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Figure 72. Aegiochus nohinohi sp. n
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Figure 74. Aegiochus nohinohi sp. n
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33°47-44’S, 5 °59’- 52°0 ’
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Figure 76. Aegiochus piihuka sp. no
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Figure 78. Aegiochus piihuka sp. no
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Figure 79. Aegiochus pushkini (Kuss
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Aegiochus riwha sp. nov. (Figs 84-8
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Figure 85. Aegiochus riwha sp. nov.
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Figure 87. Aegiochus riwha sp. nov.
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Figure 88. Aegiochus tara sp. nov.
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Figure 90. Aegiochus tara sp. nov.
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uropods, and the elongate and flat
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Figure 92. Epulaega derkoma sp. nov
Page 155 and 156: Figure 94. Epulaega derkoma sp. nov
Page 157 and 158: Figure 96. Epulaega fracta (Hale, 9
Page 159 and 160: Figure 98. Epulaega fracta (Hale, 9
Page 161 and 162: as long as wide, inferior margin wi
Page 163 and 164: Rocinela bonita sp. nov. (Figs 00-
Page 165 and 166: Figure 101. Rocinela bonita sp. nov
Page 167 and 168: Figure 103. Rocinela bonita sp. nov
Page 169 and 170: 3, more strongly produced uropod pe
Page 171 and 172: Figure 106. Rocinela garricki Hurle
Page 173 and 174: Figure 108. Rocinela garricki Hurle
Page 175 and 176: Figure 110. Rocinela leptopus sp. n
Page 177 and 178: Figure 112. Rocinela leptopus sp. n
Page 179 and 180: Figure 114. Rocinela pakari sp. nov
Page 185 and 186: Figure 119. Rocinela resima sp. nov
Page 187 and 188: Figure 121. Rocinela resima sp. nov
Page 189 and 190: Variation: Based on the four type s
Page 191 and 192: Figure 124. Rocinela runga sp. nov.
Page 193 and 194: 3, and uropodal rami that are relat
Page 195 and 196: Figure 127. Rocinela satagia sp. no
Page 197 and 198: Figure 129. Rocinela satagia sp. no
Page 199 and 200: genus Aega (e.g. A. falklandica, A.
Page 201 and 202: Figure 131. Syscenus kapoo sp. nov.
Page 203 and 204: Figure 132. Syscenus latus Richards
Page 205: Figure 134. Syscenus latus Richards
Page 209 and 210: Figure 136. Syscenus springthorpei
Page 211 and 212: evision of the species based on goo
Page 213 and 214: a nomen nudum in a footnote, by Kr
Page 215 and 216: Rocinela insularis Schioedte & Mein
Page 217 and 218: Figure 137. Aegiochus antarctica (H
Page 219 and 220: flattened antennule peduncle articl
Page 221 and 222: 0 acute RS (2 simple setae); carpus
Page 223 and 224: AMAR, R.; ROMAN, M.-L. 974: Invert
Page 225 and 226: DOLLFUS, A. 89 : Crustacés Isopode
Page 227 and 228: KUSSAKIN, O.G.; VASINA, G.S. 982: A
Page 229 and 230: ROHDE, K. 2005: Marine Parasitology
Page 231 and 232: AppENdIx 1. INvAlId AEgId NAmEs Inc
Page 233 and 234: Figure 139. Aega angustata Whiteleg
Page 235 and 236: of the uropodal exopod lacking serr
Page 237 and 238: present this record can only be con
Page 239 and 240: Figure 143. Aegiochus plebeia (Hans
Page 241 and 242: posterior margin (rather than conve
Page 243 and 244: H Figure 146. Syscenus intermedius
Page 245 and 246: Aegiochus aff. tara: ♀ (ovig. 27
Page 247 and 248: magnifica 1122112411 2213124211 131
Page 249 and 250: Aega, 7, 0, 2, 3, 4, 5, 27, 98 Aega
Page 251 and 252: Greenland, 2 2, 2 3, 2 5 Greenland
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The Marine Fauna of New Zealand: Isopoda, Aegidae (Crustacea)

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