Brucerolis brandtae, Storey & Poore, 2009

Storey, Melissa J. & Poore, Gary C. B., 2009, New species of Brucerolis (Crustacea: Isopoda: Serolidae) from seas around New Zealand and Australia, Memoirs of Museum Victoria 66 (1), pp. 147-173 : 148-154

publication ID	https://doi.org/ 10.24199/j.mmv.2009.66.15
persistent identifier	https://treatment.plazi.org/id/038EC15C-FFD7-663B-FCFC-FA91FE07FC75
treatment provided by	Felipe
scientific name	Brucerolis brandtae
status	sp. nov.

Treatment

Brucerolis brandtae View in CoL sp. nov.

Figures 1a View Figure 1 , 2 − 5 View Figure 2 View Figure 3 View Figure 4 View Figure 5

Material examined. Holotype: New Zealand, Bounty Plateau , 48°58'S, 178°02'E, 1060 m, 23 Jan 1965 ( NIWA stn F114), NIWA 27415 View Materials (adult male, 35 mm). GoogleMaps

Paratypes: New Zealand, Bounty Plateau , 48°07'S, 174°02'E, 1155 m, 21 Jan 1965 ( NIWA stn F110), NIWA 27413 View Materials (adult female, 35 mm) GoogleMaps , NIWA 27410 View Materials (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 View Materials (adult male, 36 mm) , NMV J55313 About NMV (8 males, 3 females, 8 juveniles); 48°58'S, 178°02'E, 1060 m, 23 Jan 1965 ( NIWA stn F114), NIWA 27411 View Materials (1 male, 1 female); 48°32'S, 177°59'E, 1051 m, 27 Jan 1965 ( NIWA stn F125), NIWA 27409 View Materials (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 View Materials (8 males, 8 females, 10 juveniles); 48°50.6'S, 178°41.5'E, 808 m, 17 Mar 1979 ( NIWA stn I689), NIWA 27417 View Materials (32 males, 14 females, 22 juveniles) GoogleMaps .

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.

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.