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

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Figure 86. Aegiochus riwha sp. nov. C, male paratype, NIWA 7934; remainder holotype. A–C, pereopods , 2 and 7, respectively; D, pereopod , inferior margin of merus and carpus. Variation: There were only two intact specimens available at time of description, therefore the details here are of range only. Robust setae on the pleotelson ranged from 0 or . Uropod endopod mesial margin 8– 2 RS, lateral margin always 2 RS; uropod exopod mesial margin 5 or 6 RS, lateral margin 2 or 3 RS. In both specimens there were 3 minute RS set within the apical notch. remarks: Aegiochus riwha sp. nov. is most similar to A. beri, but has coxae that are more blunt, more robust pereopods with a shorter dactylus ( .0 times as long as propodus v. .4 times as long in A. beri), ventral surface of frontal lamina is flat (angled in A. beri), the uropod rami and pleotelson margins are weakly serrate (strongly serrate in A. beri), the appendix masculina is weakly spatulate and as long as the endopod (terminally acute and shorter than the endopod in A. beri) and the apices of the uropodal rami are more widely bifid that in A. beri (narrowly bifid). In addition A. riwha has all dorsal body surfaces covered by brown chro- 44 matophores (A. beri is without such both in holotype and Lord Howe material), although without access to fresh or freshly preserved material it is not possible to place much reliance on colour difference. Given the proximity of the locations for the two species and the possibility of their being sympatric in part, these differences are considered to be of species-specific value. The difference in coxal shape readily and easily distinguishes Aegiochus riwha from Aegiochus beri. The anteriorly truncate notch on the pleotelson posterior margin separates these two species from all other southwestern Pacific and Southern Ocean species. Aegiochus quadratisinus (Richardson, 903) (Bruce 983) is known only from Hawai’i but, while similar to A. riwha, has smaller eyes and the anterior margins of the frontal lamina are concave. The maxilla appears to have the mesial lobe fused to the larger lateral lobe, and I could not distinguish the point of join under stereomicroscopy nor compound microscopy using DIC light interference.
Figure 87. Aegiochus riwha sp. nov. C–E, male paratype, NIWA 7934; remainder holotype. A–D, pleopods –3, 5 respectively; E, uropod; F, uropod endopod, ventral view; G, exopod apex; H, endopod apex. prey: There are no records. distribution: Northwestern New Zealand, and the southern West Norfolk Ridge; also off New Caledonia, and in the northwestern Pacific from off Taiwan. Potentially at depths of 697– 480 metres. etymoLogy: Riwha is a Mäori word meaning cleft or notch, in reference to the excision in the pleotelson (noun in apposition). 45
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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.
Page 93 and 94: Aegiochus coroo (Bruce, 983), comb.
Page 95 and 96: Figure 50. Aegiochus coroo (Bruce,
Page 97 and 98: size: Males 8.5- 3.0 mm (mean = .4,
Page 99 and 100: Figure 53. Aegiochus gordoni sp. no
Page 101 and 102: Figure 55. Aegiochus gordoni sp. no
Page 103 and 104: New figures of the holotypes of Aeg
Page 105 and 106: Figure 57. Aegiochus insomnis sp. n
Page 107 and 108: Figure 59. Aegiochus insomnis sp. n
Page 109 and 110: distribution: Known only from the P
Page 111 and 112: Figure 62. Aegiochus kakai sp. nov.
Page 113 and 114: Figure 64. Aegiochus kakai sp. nov.
Page 115 and 116: Figure 65. Aegiochus kanohi sp. nov
Page 117 and 118: Figure 67. Aegiochus kanohi sp. nov
Page 119 and 120: of ischium-carpus with short RS. Pe
Page 121 and 122: Figure 69. Aegiochus laevis (Studer
Page 123 and 124: southwestern or western Pacific; re
Page 125 and 126: Figure 72. Aegiochus nohinohi sp. n
Page 127 and 128: Figure 74. Aegiochus nohinohi sp. n
Page 129 and 130: 33°47-44’S, 5 °59’- 52°0 ’
Page 131 and 132: Figure 76. Aegiochus piihuka sp. no
Page 133 and 134: Figure 78. Aegiochus piihuka sp. no
Page 135 and 136: Figure 79. Aegiochus pushkini (Kuss
Page 141 and 142: Aegiochus riwha sp. nov. (Figs 84-8
Page 143: Figure 85. Aegiochus riwha sp. nov.
Page 147 and 148: Figure 88. Aegiochus tara sp. nov.
Page 149 and 150: Figure 90. Aegiochus tara sp. nov.
Page 151 and 152: uropods, and the elongate and flat
Page 153 and 154: 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
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Figure 127. Rocinela satagia sp. no
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Figure 129. Rocinela satagia sp. no
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genus Aega (e.g. A. falklandica, A.
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Figure 131. Syscenus kapoo sp. nov.
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Figure 132. Syscenus latus Richards
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Figure 134. Syscenus latus Richards
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Figure 135. Syscenus moana Bruce, 2
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Figure 136. Syscenus springthorpei
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evision of the species based on goo
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a nomen nudum in a footnote, by Kr
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Rocinela insularis Schioedte & Mein
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Figure 137. Aegiochus antarctica (H
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flattened antennule peduncle articl
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0 acute RS (2 simple setae); carpus
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AMAR, R.; ROMAN, M.-L. 974: Invert
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DOLLFUS, A. 89 : Crustacés Isopode
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KUSSAKIN, O.G.; VASINA, G.S. 982: A
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ROHDE, K. 2005: Marine Parasitology
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AppENdIx 1. INvAlId AEgId NAmEs Inc
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Figure 139. Aega angustata Whiteleg
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of the uropodal exopod lacking serr
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present this record can only be con
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Figure 143. Aegiochus plebeia (Hans
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posterior margin (rather than conve
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H Figure 146. Syscenus intermedius
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Aegiochus aff. tara: ♀ (ovig. 27
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magnifica 1122112411 2213124211 131
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Aega, 7, 0, 2, 3, 4, 5, 27, 98 Aega
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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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