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

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Figure 140. Aega angustata Whitelegge, 90 . Holotype. A–C, pereopods , 3 and 6, respectively; D, pleopod . distal lateral margin with RS, mesial margin straight (deeply serrate), with 4 RS. Exopod not extending to end of endopod, 3.8 times as long as greatest width, apically not bifid; lateral margin weakly sinuate, with 8 RS (prominent); mesial margin sinuate, proximally concave, with 2 RS. remarks: An abbreviated description of the holotype is given here to facilitate identification of this species. The specimen was not further dissected, consequently descriptive details were taken from pereopods 3 and 6 rather than the usual 2 and 7. Aega angustata is readily 234 identified by the elongate body, antennule peduncle articles and 2 being strongly compressed and expanded, antenna peduncle article 5 expanded, pereopod 3 with a large robust seta opposing the dactylus, the serrate pleotelson posterior margin, uropods with the rami not extending posterior to the pleotelson apex, the uropodal endopod with a truncate and irregularly serrate posterior margin and the lateral margin of the uropodal exopod with prominent robust setae. There are several similar species (see remarks for Aega komai, p. 37), and A. angustata is immediately separated from those species by the lateral margin
of the uropodal exopod lacking serrations and having prominent robust setae. Trilles and Justine (2004) figured a specimen from New Caledonia as having deeply serrate lateral margins to the uropodal endopod and exopod, those margins also lacking robust setae, indicating clearly that their material is not A. angustata (there are further differences in pleopod setation but the illustrations are not of a standard that permits confident interpretation). distribution: Known from southeastern Australia with records from off Sydney to the Bass Strait, Victoria. Aega punctulata Miers, 88 (Fig. 4 ) Aega edwardsii White, 847: 07 (nomen dubium; also nomen nudum, see Clark & Preswell 200 ). Æga punctulata Miers, 1881: 77, pl. 7, figs 10–12. Æga edwardsii Dollfus, 1891: F58, pl. VIII, fig. 3a–d (new synonymy). Aega punctulata.– Nierstrasz, 93 : 84. Aega (Aega) punctulata.– Brusca, 983: . ?Aega edwardsi.– Kussakin & Vasina, 1980: 359, fig. 1 [identity uncertain, see ‘remarks’]. Not Aega punctulata.– Hale, 1937: 17, fig. 5.– Bruce, Lew Ton & Poore, 2003: 161 [misidentification, see ‘remarks’]. Not Aega cf. punctulata.– Barnard, 1960, 95, fig. 2 [identity uncertain, see ‘remarks’]. materiaL examined: Holotype: ♂ (non-ovig. 29 mm), Wolsely Sound, Straits of Magellan, H.M.S. Alert (BMNH 79. 8). Non-type: ♀ (non-ovig. 33 mm), Port Stanley, Falkland Is., from mullet’s gills, coll. A.G. Bennett (BMNH 920.7.5.2). Aega edwardsii, ♂ (20 mm), ♀ (non-ovig. 26 mm), syntypes; label data: “type (Miss. Sc.du Cap Horn, 8:vi, Zool, Crust, p. 28, ’63)” (MNHN Is.2437). [Type locality is ‘Baie Orange, Cape Horn’ (Dollfus 89 ).] desCriptiVe notes: Eyes small, separated by 4 % width of head. Body dorsal surfaces coarsely punctate, with abundant stiff setae, these being most dense posteriorly. Frontal lamina anteriorly rounded, posterior margin abutting labrum. Pleotelson posterior margins angled, forming shallow median point, provided with 0– 2 (as 5+5 or 6+6) RS. Antenna peduncle article 5 slightly shorter than article 4. Pereopods –3 propodal palm with small distal lobe. Pereopod merus inferior margin with 2+3 and +3 RS; pereopod 2 merus inferior margin 4+5 RS, arranged as a single proximal row of 4 RS and distal double row; pereopod 3 similar to pereopod 4. Uropod rami extending slightly beyond posterior margin of pleotelson; dorsal surfaces with stiff setae; uropod endopod mesial margin with 7 or 8 RS, lateral with +2 RS; uropod exopod mesial with 3 or 4 RS lateral margin with 9 or 0 RS. 235 remarks: Aega punctulata can be immediately identified by the prominent, stiff setae over the dorsal body surfaces, these setae being longest on pereonites 6 and 7, pleon and pleotelson; other distinguishing characters include the relatively small and widely separated eyes (of almost cirolanid proportions), short antennule (extending only to posterior of head), short antenna (extends to posterior of pereonite ), pattern of robust setae of the merus of pereopods –3, and the shape of the posterior margin of the pleotelson, which is indistinctly angled. The holotype is in poor condition, having lost the distal articles to all the anterior pereopods. The Port Stanley specimen is largely intact, but the uropods and pleotelson posterior margin are heavily rubbed and the specimen is fragile. The descriptive details provided here were therefore obtained through direct examination. Menzies ( 962) placed Aega punctulata into synonymy with Aega semicarinata without explanation. Earlier, Hale ( 937) had clearly considered the species to be valid. There are substantial differences between A. punctulata and A. semicarinata and indeed all other species of Aega, most particularly the prominently setose dorsal body surfaces, but also the shape of the pleotelson which in A. semicarinata is medially excavate, differences in the setation of pereopods –3 and in A. semicarinata much larger eyes. Aega urotoma is similar, but again lacks the setose body surfaces, has a subtruncate posterior margin to the pleotelson, which also lacks robust setae, has more strongly expanded antennule peduncle and antenna peduncle articles 4 and 5, and has short robust setae on the merus of pereopods –3 in comparison to A. punctulata, these robust setae being arranged in a different pattern. Examination of the syntypes of Aega edwardsii Dollfus, 1891 allows confirmation that the species is a junior synonym of Aega punctulata. Although most dorsal setae are missing, enough setae remain and the presence of numerous setal sockets indicate that these specimens bear the unique setosity of A. punctulata. The synonymy is further confirmed by the eye size, frontal lamina shape, pleotelson, pereopod and uropod morphology and setation. Hale’s ( 937) record of this species from Maria Island, off Tasmania, is a misidentification. Hale specifically mentions that his specimens lack the setose body surfaces described by Miers ( 88 ) as well as having more strongly dilated antennule and antenna, and illustrated his material as having larger eyes, a clearly rounded and crenulated posterior margin to the pleotelson and a more elongate frontal lamina. In A. punctulata antenna peduncle article 5 is shorter than article 4 while in Hale’s figure it is longer. The identity of a Hale’s record remains uncertain at present, although
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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
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Figure 94. Epulaega derkoma sp. nov
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Figure 96. Epulaega fracta (Hale, 9
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Figure 98. Epulaega fracta (Hale, 9
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as long as wide, inferior margin wi
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Rocinela bonita sp. nov. (Figs 00-
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Figure 101. Rocinela bonita sp. nov
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Figure 103. Rocinela bonita sp. nov
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3, more strongly produced uropod pe
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Figure 106. Rocinela garricki Hurle
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Figure 108. Rocinela garricki Hurle
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Figure 110. Rocinela leptopus sp. n
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Figure 112. Rocinela leptopus sp. n
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Figure 114. Rocinela pakari sp. nov
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Figure 116. Rocinela pakari sp. nov
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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
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Page 207 and 208: Figure 135. Syscenus moana Bruce, 2
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: Figure 139. Aega angustata Whiteleg
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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