New species of Brucerolis (Crustacea: Isopoda: Serolidae) from seas around New Zealand and Australia Author Storey, Melissa J. Author Poore, Gary C. B. text Memoirs of Museum Victoria 2009 2009-12-31 66 1 147 173 https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-66-issue-1-2009/pages-147-173/ journal article 10.24199/j.mmv.2009.66.15 1447-2554 12211711 Brucerolis brandtae sp. nov. Figures 1a , 2 − 5 Material examined . Holotype : New Zealand , Bounty Plateau , 48°58'S , 178°02'E , 1060 m , 23 Jan 1965 ( NIWA stn F114), NIWA 27415 (adult male, 35 mm ). Paratypes : New Zealand , Bounty Plateau , 48°07'S , 174°02'E , 1155 m , 21 Jan 1965 ( NIWA stn F110), NIWA 27413 (adult female, 35 mm ) , NIWA 27410 ( 1 male , 1 juvenile ); 49°18.6 − 17.5'S, 177°54.7 − 55.5'E, 990 m , 15 Mar 1981 ( NIWA stn T48 ), NIWA 27414 (adult male, 36 mm ) , NMV J55313 ( 8 males , 3 females , 8 juveniles ); 48°58'S , 178°02'E , 1060 m , 23 Jan 1965 ( NIWA stn F114), NIWA 27411 ( 1 male , 1 female ); 48°32'S , 177°59'E , 1051 m , 27 Jan 1965 ( NIWA stn F125), NIWA 27409 ( 2 males , 2 females , 1 juvenile ); 48°30.5 − 32'S, 178°18 − 23.8'E, 915 m , 19 Mar 1979 ( NIWA stn I697), NIWA 27412 ( 8 males , 8 females , 10 juveniles ); 48°50.6'S , 178°41.5'E , 808 m , 17 Mar 1979 ( NIWA stn I689), NIWA 27417 ( 32 males , 14 females , 22 juveniles ) . Other material: numerous specimens from 37 NIWA stations. Description of male holotype . Body length 35 mm . Body 0.8 times as long as greatest width (at coxae 3). Middorsal line with short triangular middorsal processes on posterior margin of head, pereonites 2–4 and pleonites 1–3, evident in lateral view. Head, anterolateral margins straight-concave, lateral corners acute and projecting anteriorly; width between anterolateral corners 1.6 times as wide as maximum span between lateral margins of eyes; head with paired strongly projecting curving acute processes on transverse ridge at bases of antennae 1, with prominent paired tubercles between eyes, with small, blunt median posterior tubercle, with obscure lobes lateral to median posterior tubercle. Pereonite 1, lateral margin gently sinuous, lateral margin upturned over anterior half, sharply crested, with sinuous low rounded oblique ridge more or less parallel to margin, separated from it by a shallow concave trough occupying about one-third of width, dorsal surface with obsolete oblique-transverse ridge reaching sinuous ridge. Coxal dorsal plate 2 0.8 times as long as half pereonal tergite 2 width (following plates increasing in length); plate 4 1.9 times as long as half pereonal tergite 4 width; plate 6 extending beyond tip of pleotelson by 2.2 times middorsal length of pleotelson (minimum estimate), the pair diverging and then converging slightly apically, curving evenly; pleonal epimeron 2 2.2 times length of pleotelson; pleonal epimeron 3 1.2 times length of pleotelson; pleonal epimera 2 and 3 with acute apices. Ventral coxal plates 2–4 with transverse ridges on mesial, anterior and posterior margins outlining a transverse depression. Antenna 1 peduncle articles 3+4 2 times as long as article 2 (anterior margin); flagellum of about 42 articles. Antenna 2 peduncle article 5 1.4 times as long as article 4; flagellum of 18 articles. Pereopod 1 propodus 2.2 times as long as greatest width. Pereopod 2 palm dorsal length 1.8 times greatest width, straight, sharply angled at free proximal margin, with 20 robust setae in U-shaped row. Pereopod 7 carpus 5 times as long as greatest width; propodus 4.5 times as long as greatest width, propodus tapering from near base, lower margin straight; dactylus curved, 0.45 times as long as propodus. Pleopod 2 endopod with convex distal margin, sharply tapering to base of appendix masculina; appendix masculina 3.8 times as long as straight margin of endopod. Uropodal exopod 0.85 length of endopod. Figure 1. Head and pereonite 1 of species of Brucerolis . a, B. brandtae sp. nov. (NMV J55313). b, B. bromleyana (syntype, BMNH 1889.4.27.20, negative of drawing by Kate Thompson published by Poore & Brandt, 1997 ). c, B. cidaris (NMV J27642). d, B. howensis (NMV J55315). e, B. hurleyi (NMV J55314). f, B. nowra (NMV J19213). g, B. osheai (NMV J55316). h, B. victoriensis (NMV J19201). Scale bar in each case = 10 mm. Figure 2. Brucerolis brandtae sp. nov. Holotype male (NIWA 27415): dorsal and lateral views, sternites of pereonites 1–7, pleonites 1–3, medial ridge of pleonites 1–3. Paratype female (NIWA 27413): dorsal and lateral views, medial ridge of pleonites 1–3. Paratype male (NIWA 27414): uropod. Scale = 10 mm. Figure 3. Brucerolis brandtae sp. nov. Holotype male (NIWA 27415): antenna 1, mandibular incisors, palp, maxillae 1, 2, maxilliped. Paratype male (NIWA 27414): antenna 2. Figure 4. Brucerolis brandtae sp. nov. Holotype male (NIWA 27415): pereopods 1–5. Paratype female (NIWA 27413): pereopod 2. Figure 5. Brucerolis brandtae sp. nov. Holotype male (NIWA 27415): pereopods 6, 7, pleopods 1–5. Paratype male (NIWA 27414): pleopod 2 endopod and appendix masculina. Female . Pereonite 1, lateral margin of female convex anteriorly, with distinct step-like interruption and straight posteriorly. Coxal dorsal plate 2 of female 0.8 times as long as half pereonal tergite 2 width; plate 4 of female 1.4 times as long as half pereonal tergite 4 width (following plates increasing in length); plate 6 of female extending beyond tip of pleotelson by 2 times middorsal length of pleotelson (or more), the pair diverging over entire length, curving evenly. Size. Male length: 24 − 40 mm , female length: 27 − 35 mm . Distribution. New Zealand , eastern slope, Chatham Rise, Bounty Plateau, northern Campbell Plateau, 39°S − 51°S , 167°E − 179°W , 494 − 1500 m . One record NE of North Island, 2500 m , and one record W of South Island. Etymology. Brucerolis brandtae is named for Professor Angelika Brandt, who studied the phylogeny of serolids and described new serolid genera and species. Remarks. The large size of males and females (up to 40 and 35 mm respectively) of Brucerolis brandtae and the wide anterolateral head lobes with a straight or convex anterior margin are useful characters for identifying this species. Like B . hurleyi and B . osheai , the anterior transverse ridge on the head of B . brandtae has a strongly acute, posteriorly curved dorsal projection immediately adjacent to the insertion of antenna 1 on both sides.