Phylladiorhynchus nui,

Schnabel, Kareen E. & Ahyong, Shane T., 2019, The squat lobster genus Phylladiorhynchus Baba, 1969 in New Zealand and eastern Australia, with description of six new species, Zootaxa 4688 (3), pp. 301-347: 320-329

publication ID

https://doi.org/10.11646/zootaxa.4688.3.1

publication LSID

lsid:zoobank.org:pub:DC8D545C-9F75-4A4E-B6DD-22A547694B27

persistent identifier

http://treatment.plazi.org/id/03E48785-734B-FFD4-FF25-B3DAFBA4FC9C

treatment provided by

Plazi

scientific name

Phylladiorhynchus nui
status

n. sp.

Phylladiorhynchus nui  n. sp.

( Figs. 3View FIGURE 3, 8View FIGURE 8, 9View FIGURE 9, 15BView FIGURE 15)

Phylladiorhynchus pusillus  .— Haig, 1973: 282 (S of Cape Everard (Victoria), S and SW of Mt Cann (Victoria), and off St. Helens Point, Tasmania, 110–183 m).

Phylladiorhynchus cf. pusillus  .— Ahyong, 2007: 42 View Cited Treatment , fig. 20B, 22.

Phylladiorhynchus  sp. 1.— Rowden et al., 2010: tab. 3.

Type material. HOLOTYPE: NIWA 33657View Materials, male (6.9 mm), Stn. TAN0705 /10, 44.129–44.120°S, 174.845– 174.842°E, 513–517 m, 03 Apr 2007GoogleMaps  . PARATYPES: NIWA 33682View Materials, 2 males (5.9, 7.7mm), 1 female (7.4 mm), Stn. TAN0705 /166, 42.999 – 42.992°SGoogleMaps  , 177.600– 177.594°W, 520–525 m, 17 Apr 2007. NIWA 42691View Materials, 1 male (6.8 mm), 1 female (4.9 mm), Stn. TAN0705 /181, 44.068 – 44.064°SGoogleMaps  , 178.549– 178.540°W, 451–452 m, 18 Apr 2007. NIWA 42692View Materials, 3 males (5.0, 6.6, 7.0 mm), 1 female (7.4 mm), Stn. TAN0705 /185, 43.629 – 43.632°SGoogleMaps  , 178.611– 178.611°W, 420–426 m, 18 Apr 2007. NIWA 33658View Materials, 1 male (5.9 mm), Stn. TAN0705 /24, 44.121 – 44.124°SGoogleMaps  , 174.843– 174.845°E, 512–513 m, 04 Apr 2007.

Other material. Norfolk Ridge: NIWA 28065View Materials, 1 female (5.1 mm), NORFANZ Stn. TAN 0308/126, South Norfolk Ridge , 33.390 – 33.396°SGoogleMaps  , 170.193– 170.203°E, 490–526 m, 31 May 2003.

Northland Plateau: NIWA 10919View Materials, 1 female (4.9 mm)  , NZOI Stn. F925, 34.087°S, 172.800°E, 503 m, 14 Oct 1968GoogleMaps  . NIWA 3599View Materials, 1 male (5.5 mm), 1 female (4.7 mm), Stn. KAH 0204/40, West Cavalli Seamount , 34.164°S, 173.964°E, 820– 805 m, 18 Apr 2002GoogleMaps  . NIWA 10146View Materials, 1 male (4.7 mm)  , NZOI Stn. I 368, 34.213°S, 173.022°E, 452–460 m, 23 Nov 1977GoogleMaps  . NIWA 21231View Materials, 1 male (4.5 mm), 2 females ov. (3.5, 3.8 mm)  , NZOI Stn. I 348, 34.537°S, 173.633°E, 349 m, 17 Nov 1977GoogleMaps  . NIWA 21291View Materials, 1 male (3.7 mm), 1 female (4.0 mm)  , NZOI Stn. E875, 34.650°S, 172.117°E, 489 m, 21 Mar 1968GoogleMaps  . NIWA 10921View Materials, 1 female (7.1 mm)  , NZOI Stn. I 351, 34.677°S, 173.842°E, no depth information, 19 Nov 1977GoogleMaps  . NIWA 10116View Materials, 2 males (4.6, 5.0 mm), 3 females (4.1, 4.6, 6.0 mm)  , NZOI Stn. I 366, 34.705 S°, 174.293°E, 705 m, 20 Nov 1977GoogleMaps  . NIWA 10132View Materials, 1 female (7.7 mm)  , NZOI Stn. I 353, 34.757°S, 174.068°E, 530 m, 19 Nov 1977GoogleMaps  . NIWA 10148View Materials, 1 male (5.7 mm), 1 female (4.5 mm)  , NZOI Stn. I 364, 34.767°S, 174.097°E, 492 m, 20 Nov 1977GoogleMaps  . NIWA 21244View Materials, 2 males (3.3, 5.2 mm), 1 female ov. (5.7 mm)  , NZOI Stn. I 365, 34.797°S, 174.107°E, 436 m, 20 Nov 1977GoogleMaps  . NIWA 21167View Materials, 1 male (3.6 mm)  , NZOI Stn. I  34, 35°S, 175.217°E, 575 m, 07 May 1975. NIWA 21264View Materials, 1 female (5.6 mm)  , NZOI Stn. I36  , 35.003°S, 174.820°E, 625 m, 07 May 1975. NIWA 21194View Materials, 1 male (6.6 mm), 3 females (4.8, 5.7, 5.9 mm)  , NZOI Stn. I37  , 35.010°S, 174.668°E, 560 m, 8 May 1975. NIWA 10077View Materials, 10 males (3.6–5.0 mm), 1 female ov. (4.7 mm), 4 females (3.1–5.0 mm)  , NZOI Stn. P 66, 35.063°S, 172.377°E, 435 m, 07 Feb 1977GoogleMaps  . NIWA 21156View Materials, 2 males (6.1, 6.5 mm), 3 females (3.5, 4.5, 5.6 mm)  , NZOI Stn. P 65, 35.083°S, 172.443°E, 302 m, 07 Feb 1977GoogleMaps  . NIWA 21169View Materials, 3 males (5.2, 5.7, 8.6 mm), 2 females (4.9, 5.5 mm)  , NZOI Stn. I25  , 35.185°S, 175.102°E, 675 m, 06 May 1975. NIWA 21288View Materials, 1 male (5.1 mm), 3 females (2.5, 5.2, 5.8 mm)  , NZOI Stn. E879, 35.317°S, 172.417°E, 768 m, 22 Mar 1968GoogleMaps  . NIWA 21262View Materials, 1 female (4.5 mm)  , NZOI Stn. I11  , 35.598°S, 175.213°E, 308 m, 04 May 1975. NIWA 21249View Materials, 1 female (4.2 mm)  , NZOI Stn. I6  , 35.797°S, 175.610°E, 257 m, 03 May 1975. NIWA 21225View Materials, 1 male (5.6 mm)  , NZOI Stn. I7  , 35.797°S, 175.835°E, 367 m, 03 May 1975. NIWA 9794View Materials, 1 female (8.5 mm), Stn. KAH9801 /33, 36.776°S, 176.276°E, 465 m, 23 Jan 1998GoogleMaps  . NIWA 21216View Materials, 1 female (4.5 mm)  , NZOI Stn. E889, 36.80°S, 173.667°E, 727 m, 23 Mar 1968GoogleMaps  . NIWA 9795View Materials, 1 male (4.7 mm), 1 female ov. (4.9 mm), Stn. Z9230, 36.885°S, 177.367°E, 787 m, 15 Aug 1998GoogleMaps  .

Bay of Plenty: NIWA 9796View Materials, 1 male (3.0 mm), 1 female ov. (4.5 mm), Stn. Z 9224, 37.134°S, 177.285°E, 648 m, 13 Aug 1998GoogleMaps  . NIWA 10203View Materials, 1 male (carapace broken), Stn. TAN0413 /138, Mahina Seamount, 37.316–37.312°S, 177.0748–177.0745°E, 495– 466 m, 14 Nov 2004GoogleMaps  . NIWA 82442View Materials, 1 female (8.6 mm), Stn. TAN1206 /53, 37.504– 37.501°S, 177.619–177.614°E, 696– 689 m, 20 Apr 2012GoogleMaps  .

Challenger Plateau and central western New Zealand: NIWA 33723View Materials, 1 male (3.6 mm), Stn. TAN0707/84, 38.208–38.200°S, 168.585–168.582°E, 512–526 m, 03 Jun 2007GoogleMaps  . NHMUK 1907.7.16.5–9, 9 males (3.7–6.0 mm), 3 females ov. (5.5, 7.5, 9.0 mm), 8 females (4.0– 7.3 mm), 38.217°S, 168.708°E, 380 fathoms (695 m), presented by F. Wood James EsqGoogleMaps  . NIWA 21279View Materials, 1 male (6.2 mm)  , NZOI Stn. E906, 38.650°S, 172.633°E, 691 m, 28 Mar 1968GoogleMaps  . NIWA 10906View Materials, 1 male (4.0 mm)  , NZOI Stn. J28, 38.833°S, 169.650°E, 548 m, 16 Apr 1970GoogleMaps  . NIWA 21242View Materials, 1 female ov. (4.0 mm)  , NZOI Stn. D226, 39.900°S, 168.667°E, 823 m, 27 Sep 1964GoogleMaps  . NIWA 21188View Materials, 2 females ov. (4.0, 5.7 mm)  , NZOI Stn. V426B, 41.667°S, 170.663°E, 327 m, 10 Sep 1992GoogleMaps  .

Hikurangi Margin: NIWA 21179View Materials, 1 female (6.8 mm)  , NZOI Stn. E719, 38.767°S, 178.800°E, 913 m, 23 Mar 1967GoogleMaps  . NIWA 29287View Materials, 1 male (6.5 mm), Stn  . TAN0616 /18, 39.541–39.547°S, 178.332–178.333°E, 775–810 m, 05 Nov 2006GoogleMaps  . NIWA 29289View Materials, 1 male (5.0 mm), 2 females ov. (4.0, 5.6 mm), Stn  . TAN0616 /21, 39.543–39.544°S, 178.336–178.328°E, 815– 812 m, 05 Nov 2006GoogleMaps  . NIWA 29291View Materials, 1 female ov. (6.0 mm), 1 female (5.6 mm), Stn  . TAN0616 /38, 39.543–39.544°S, 178.337–178.327°E, 815–819 m, 06 Nov 2006GoogleMaps  . NIWA 29292View Materials, 1 male (4.9 mm), Stn  . TAN0616 /38, 39.543–39.544°S, 178.337–178.327°E, 815–819 m, 06 Nov 2006GoogleMaps  . NIWA 29293View Materials, 1 female ov. (3.5 mm), Stn  . TAN0616 /38, 39.543–39.544°S, 178.337–178.327°E, 815–819 m, 06 Nov 2006GoogleMaps  . NIWA 29290View Materials, 1 male (5.6 mm), 1 female ov. (6.5 mm), 1 female (4.5 mm), Stn  . TAN0616 /30, 39.545–39.550°S, 178.331–178.332°E, 790–815 m, 06 Nov 2006GoogleMaps  . NIWA 29286View Materials, 1 male (5.5 mm), Stn  . TAN0616 /12, 40.040–40.044°S, 178.145–178.148°E, 749–787 m, 04 Nov 2006GoogleMaps  . NIWA 21274View Materials, 1 male (3.1 mm)  , NZOI Stn. F719, 40.233°S, 177.217°E, 604 m, 06 Dec 1965GoogleMaps  . NIWA 63021View Materials, 1 male (broken carapace), Stn  . TAN1004 /2, slope site, 41.671–41.665°S, 175.625–175.645°E, 640– 635 m, 15 Apr 2010GoogleMaps  . NIWA 21220View Materials, 4 males (3.9–5.2 mm), 1 female ov. (4.3 mm), 2 females (4.6, 5.9 mm)  , NZOI Stn. E752, 41.678°S, 175.257°E, 618 m, 30 Mar 1967GoogleMaps  . NIWA 64164View Materials, 1 female (6.4 mm), Stn  . TAN1004 /120, slope site, 41.985–41.982°S, 174.699–174.692°E, 730– 685 m, 26 Apr 2010GoogleMaps  . NIWA 63603View Materials, 2 females (5.5, 7.7 mm), Stn  . TAN1004 /57, canyon site, 41.410–41.414°S, 175.898–175.897°E, 614–670 m, 20 Apr 2010GoogleMaps  . NIWA 63876View Materials, 2 males (5.9, 6.6 mm), Stn  . TAN1004 /91, canyon site, 41.895–41.888°S, 174.633–174.634°E, 740– 620 m, 24 Apr 2010GoogleMaps  . NIWA 69777View Materials, 1 male (4.8 mm), Stn  . TAN1004 /66, seamount site, 41.319–41.321°S, 176.197–176.192°E, 495 m, 21 Apr 2010GoogleMaps  . NIWA 63980View Materials, 1 female (broken carapace), Stn  . TAN1004 /110, seamount site, 42.127–42.12°S, 174.579– 74.585°E, 1280– 1246 m, 25 Apr 2010GoogleMaps  .

Cook Strait: NIWA 21192View Materials, 1 female (6.6 mm)  , NZOI Stn. E755, 42.008°S, 174.423°E, 247 m, 30 Mar 1967GoogleMaps  . NIWA 21183View Materials, 1 male (4.0 mm)  , NZOI Stn. E757, 42.053°S, 174.453°E, 1081 m, 30 Mar 1967GoogleMaps  .

Southwestern New Zealand (off Hokitika): NIWA21199View Materials, 1 male (4.8 mm)  , NZOI Stn. S 894, 42.517°S, 170.335°E, 530 m, 19 Jul 1991GoogleMaps  . NIWA 10913View Materials, 1 female ov. (4.1 mm), 1 female (3.9 mm)  , NZOI Stn. V423, 42.559°S, 170.430°E, 522 m, 09 Sep 1992GoogleMaps  . NIWA 21227View Materials, 1 male (6.2 mm), 1 female (5.2 mm)  , NZOI Stn. V423, 42.559°S, 170.430°E, 522 m, 09 Sep 1992GoogleMaps  . NIWA 10891View Materials, 1 female ov. (8.6 mm), 2 females (5.0, 5.1 mm)  , NZOI Stn. V424, 42.567°S, 170.332°E, 600 m, 09 Sep 1992GoogleMaps  . NIWA 10889View Materials, 1 female (4.2 mm)  , NZOI Stn. V417, 42.571°S, 170.422°E, 670 m, 06 Sep 1992GoogleMaps  .

North Canterbury region and Chatham Rise   : NIWA 10128View Materials, 1 female (5.6 mm)  , NZOI Stn. C 686, Kaikoura Canyon, 42.542°S, 173.752°E, 820 m, 17 Jun 1961GoogleMaps  . NIWA 21243View Materials, 1 female ov. (4.5 mm)  , NZOI Stn. V370, 42.712°S, 178.996°W, 1022 m, 12 Sep 1989GoogleMaps  . NIWA 21217View Materials, 1 male (4.9 mm), 1 female (4.5 mm)  , NZOI Stn. S 212, Kaikoura Canyon, 42.740°S, 173.615°E, 320 m, 04 Nov 1979GoogleMaps  . NIWA 43331View Materials, 1 male (6.2 mm), Stn. TAN 0104/399, Z10743View Materials, Morgue Seamount , 42.720–42.722°S, 179.960–179.961°W, 1012– 890 m, 21 Apr 2001GoogleMaps  . NIWA 43330View Materials, 1 male (3.5 mm), Stn. TAN 0104/43, Z10693View Materials, Graveyard Seamount , 42.763–42.764°S, 179.988–179.986°W, 1064– 750 m, 16 Apr 2001GoogleMaps  . NIWA 43336View Materials, 2 females (3.2, 5.7 mm), Stn. TAN 0104/43, Z10693View Materials, Graveyard Seamount , 42.763– 42.764°S, 179.988–179.986°W, 1064– 750 m, 16 Apr 2001GoogleMaps  . NIWA 43335View Materials, 3 males (3.2, 3.5, 5.0 mm), 2 females (3.0, 4.5 mm), Stn. TAN 0104/289, Graveyard Seamount , 42.765–42.768°S, 179.986–179.983°W, 800– 757 m, 19 Apr 2001GoogleMaps  . NIWA 29543View Materials, 29 May 2006  , 1 male (5.3 mm), Stn. TAN 0604/16, Graveyard Hill , 42.765–42.771°S, 179.988–179.985°W, 993–1090 mGoogleMaps  . NIWA 43333View Materials, 1 male (5.5 mm), Stn. TAN 0104/2, Z10690View Materials, Graveyard Seamount , 42.766–42.769°S, 179.99 °W, 875– 757 m, 15 Apr 2001GoogleMaps  . NIWA 43334View Materials, 1 male (6.7 mm), 2 females (6.5, 7.0 mm), Stn. TAN 0104/48, TAN 0104/48, Diabolical Seamount , 42.786°S, 179.985°W, 993– 900 m, 16 Apr 2001GoogleMaps  . NIWA 21272View Materials, 2 males (3.4, 4.0 mm), 1 female ov. (6.3 mm)  , NZOI Stn. V369, 42.831°S, 178.992°E, 1048 m, 11 Sep 1989GoogleMaps  . NIWA 53402View Materials, 1 male (4.5 mm), Stn. TAN 0905/66, Casket Seamount , 42.834–42.836°S, 179.987–179.986°W, 795– 850 m, 22 Jun 2009GoogleMaps  . NIWA 24566View Materials, 1 male (6.0 mm), Stn. TAN1208 /35, 42.911–42.916°S, 179.962–179.961°W, 758– 751 m, 19 Jun 2012GoogleMaps  . NIWA 19422View Materials, 2 males (5.0, 5.5 mm), 3 females ov. (5.5, 6.3, 6.3 mm), 1 female (6.7 mm)  , NZOI Stn. S 201, Canterbury shelf, 42.943°S, 173.650°E, 340 m, 01 Nov 1979GoogleMaps  . NIWA 33681View Materials, 1 female (2.2 mm), Stn. TAN0705 /166, 42.999–42.992°S, 177.60–177.594°W, 520–525 m, 17 Apr 2007GoogleMaps  . NIWA 21267View Materials, 2 males (5.0, 6.5 mm), 1 female (5.2 mm)  , NZOI Stn. V371, 43.002°S, 179.000°W, 546 m, 12 Sep 1989GoogleMaps  . NIWA 78081View Materials, 1 female ov. (6.5 mm), Stn. TAN1116 /1, 43.004–43.005°S, 175.048–175.045°E, 440–441 m, 03 Nov 2011GoogleMaps  . NIWA 21233View Materials, 1 female ov. (5.7 mm)  , NZOI Stn. A 910, 43.0667°S, 178.65°W, 549 m, 13 Sep 1963GoogleMaps  . NIWA 21281View Materials, 1 female ov. (3.0 mm)  , NZOI Stn. A 910, 43.067°S, 178.65°W, 549 m, 13 Sep 1963GoogleMaps  . NIWA 24567View Materials, 2 males (5.0, 5.7 mm), 2 females (4.2, 6.0 mm), Stn. TAN 1208/37, 43.154–43.152°S, 179.700–179.694°W, 524– 523 m, 19 Jun 2012GoogleMaps  . NIWA 24569View Materials, 3 males (5.3, 6.1, 6.7 mm), Stn. TAN1208 /38, 43.165–43.166°S, 179.468–179.461°W, 522–523 m, 19 Jun 2012GoogleMaps  . NIWA 24568View Materials, 1 female (6.8 mm), Stn. TAN1208 /36, 43.202–43.208°S, 179.841–179.840°W, 518– 516 m, 19 Jun 2012GoogleMaps  . NIWA 21222View Materials, 1 female ov. (3.4 mm)  , NZOI Stn. V367, 43.248°S, 179.000°W, 467 m, 08 Sep 1989GoogleMaps  . NIWA 11053View Materials, 1 male (7.3 mm)  , NZOI Stn. A 759B, 43.267°S, 176.183°E, 348 m, 21 Nov 1962GoogleMaps  . NIWA 19423View Materials, 1 male (6.8 mm), 3 female ov. (4.5, 4.8, 8.0 mm)  , NZOI Stn. S 186, Pegasus Canyon, 43.275°S, 173.593°E, 450 m, 31 Oct 1979GoogleMaps  . NIWA 127208View Materials, 1 male (7.3 mm)  , RV Sonne Stn. SO 254/77 ROV14, Pegasus Canyon slope, off Christchurch shelf, 43.29°S, 173.607°E, 851 m, 20 Feb 2017GoogleMaps  . NIWA 21246View Materials, 2 females ov. (4.5, 5.6 mm)  , NZOI Stn. V389, 43.334°S, 176.997°E, 237 m, 16 Sep 1989GoogleMaps  . NIWA 21266View Materials, 1 male (6.6 mm), 1 female ov. (4.4 mm), 3 females (3.5, 5.2, 7.2 mm)  , NZOI Stn. V372, 43.335°S, 178.981°E, 418 m, 13 Sep 1989GoogleMaps  . NIWA 10653View Materials, 4 males (5.8–8.0 mm)  , NZOI Stn. W257, 43.375°S, 179°E, 400– 390 m, 18 Sep 1993GoogleMaps  . NIWA 21283View Materials, 1 male (4.1 mm)  , NZOI Stn. A 908, 43.455°S, 179.050°W, 459 m, 13 Sep 1963GoogleMaps  . NIWA 21157View Materials, 22 specimens (not measured)  , NZOI Stn. V366, 43.498°S, 178.995°W, 499 m, 08 Sep 1989GoogleMaps  . NIWA 21185View Materials, 1 female ov. (8.0 mm), 1 female (6.9 mm)  , NZOI Stn. E434, 43.5°S, 174.5°E, 556 m, 18 Oct 1965GoogleMaps  . NIWA 21172View Materials, 3 females ov. (3.7, 4.0, 6.1 mm), 3 females (4.4, 4.7, 7.0 mm)  , NZOI Stn. V361, 43.506°S, 178.648°E, 340 m, 06 Sep 1989GoogleMaps  . NIWA 19424View Materials, 1 female ov. (8.0 mm), 1 female (5.8 mm)  , NZOI Stn. S 121, 43.510°S, 175.968°E, 335 m, 20 Oct 1979GoogleMaps  . NIWA 19421View Materials, 1 female ov. (8.1 mm), 1 female (8.0 mm)  , NZOI Stn. S 124, 43.512°S, 175.998°E, 363 m, 20 Oct 1979GoogleMaps  . NIWA 117997View Materials, 5 males (3.5–4.9 mm), 6 females (3.0– 4.2 mm), Stn. TAN 0705/179, 43.520–43.522°S, 178.619–178.622°W, 423–425 m, 18 Apr 2007GoogleMaps  . NIWA 26458View Materials, 1 male (5.4 mm), Stn. TAN 0604/110, Main Knoll, central Chatham Rise , 43.531–43.528°S, 179.629–179.633°E, 378–390 m, 07 Jun 2006GoogleMaps  . NIWA 26451View Materials, 1 male (6.0 mm), 2 females (5.6, 6.0 mm), Stn. TAN 0604/110, Main Knoll, central Chatham Rise , 43.531–43.528°S, 179.629–179.633°E, 378–390 m, 07 Jun 2006GoogleMaps  . NIWA 26450View Materials, 3 males (5.0, 6.8, 7.0 mm), Stn. TAN 0604/108, Main Knoll, central Chatham Rise , 43.533–43.535°S, 179.628–179.626°E, 375– 381 m, 06 Jun 2006GoogleMaps  . NIWA 21273View Materials, 1 male (3.0 mm)  , NZOI Stn. G 247, 43.533°S, 179.567°E, 399 m, 22 Jan 1968GoogleMaps  . NIWA 21221View Materials, 1 female (4.2 mm)  , NZOI Stn. G 365, 43.55°S, 178.533°W, 228 m, 03 Feb 1968GoogleMaps  . NIWA 21219View Materials, 1 female (6.0 mm)  , NZOI Stn. G 259A, 43.55°S, 179.367°E, 410 m, 23 Jan 1968GoogleMaps  . NIWA 21190View Materials, 1 male (4.3 mm)  , NZOI Stn. S 126, 43.557°S, 175.977°E, 322 m, 20 Oct 1979GoogleMaps  . NIWA 21189View Materials, 1 male (8.2 mm)  , NZOI Stn. S 130, 43.567°S, 175.962°E, 335 m, 21 Oct 1979GoogleMaps  . NIWA 21284View Materials, 1 female ov. (7.0 mm), 2 females (4.7, 5.3 mm)  , NZOI Stn. V388, 43.581°S, 176.999°E, 331 m, 16 Sep 1989GoogleMaps  . NIWA 11042View Materials, 1 male (6.2 mm), 1 female ov. (4.9 mm), 1 female (6.0 mm)  , NZOI Stn. S 127, 43.59°S, 175.955°E, 322 m, 20 Oct 1979GoogleMaps  . NIWA 21293View Materials, 1 female (6.0 mm)  , NZOI Stn. A 913, 43.617°S, 178.192°W, 402 m, 14 Sep 1963GoogleMaps  . NIWA 10986View Materials, 2 males (4.9, 7.7 mm), 2 females ov. (5.0, 6.0 mm)  , NZOI Stn. W252, 43.628°S, 178.997°E, 400–428 m, 15 Sep 1993GoogleMaps  . NIWA 117995View Materials, 1 male (5.9 mm), 3 females (5.0– 7.1 mm), Stn. TAN 0705/185, 43.629–43.632°S, 178.611–178.611°W, 420–426 m, 18 Apr 2007GoogleMaps  . NIWA 21196View Materials, 1 male (6.5 mm), 1 female ov. (6.8 mm)  , NZOI Stn. V373, 43.647°S, 179.001°E, 392 m, 13 Sep 1989GoogleMaps  . NIWA 21193View Materials, 1 female (2.9 mm)  , NZOI Stn. G 335A, 43.65°S, 178.933°W, 402 m, 02 Feb 1968GoogleMaps  . NIWA 19428View Materials, 49 specimens (not measured)  , NZOI Stn. G 293, 43.667°S, 179.467°E, 421 m, 25 Jan 1968GoogleMaps  . NIWA 21292View Materials, 2 males (5.4, 8.2 mm)  , NZOI Stn. G 292, 43.700°S, 179.800°E, 454 m, 25 Jan 1968GoogleMaps  . NIWA 21195View Materials, 1 female (6.6 mm)  , NZOI Stn. Q4A, 43.703°S, 179.912°W, 398 m, 12 Mar 1978GoogleMaps  . NIWA 21200View Materials, 1 female ov. (8.5 mm)  , NZOI Stn. E433, 43.717°S, 174.5°E, 571 m, 18 Oct 1965GoogleMaps  . NIWA 21218View Materials, 1 male (6.6 mm)  , NZOI Stn. Q10, 43.718°S, 179.335°W, 395 m, 15 Mar 1978GoogleMaps  . NIWA 24956View Materials, 1 male (5.3 mm), 1 female (5.5 mm)  , NZOI Stn. TAN0801 /66, 43.728°S, 176.577°E, 430–439 m, 11 Jan 2008GoogleMaps  . NIWA 10881View Materials, 1 male (6.5 mm)  , NZOI Stn. D 119, 43.75°S, 178.667°E, 492 m, 11 Oct 1963GoogleMaps  . NIWA 21226View Materials, 1 male (6.7 mm)  , NZOI Stn. G 353A, 43.783°S, 178.633°W, 468 m, 03 Feb 1968GoogleMaps  . NIWA 21191View Materials, 1 male (3.8 mm)  , NZOI Stn. V387, 43.827°S, 176.997°E 498 m, 16 Sep 1989GoogleMaps  . NIWA 21240View Materials, 1 female (5.0 mm)  , NZOI Stn. D 909, 43.833°S, 179.717°W, 400 m, 31 Mar 1969GoogleMaps  . NIWA 21277View Materials, 1 female (5.2 mm)  , NZOI Stn. D 90, 43.833°S, 179°W, 399 m, 17 May 1963GoogleMaps  . NIWA 35100View Materials, 1 male (9.0 mm), Stn. TAN0705 /42, 43.840–43.843°S, 176.707–176.705°E, 479– 479 m, 06 Apr 2007GoogleMaps  . NIWA 33692View Materials, 3 males (4.0, 4.5, 6.0 mm), 3 females (4.5–8.5 mm), Stn. TAN 0705/183, 43.841–43.844°S, 178.590–178.593°W, 460–462 m, 18 Apr 2007GoogleMaps  . NIWA 21224View Materials, 1 female (7.8 mm), Stn. TAN9901 /50, 43.849°S, 179.829°E, 439 m, 13 Jan 1999GoogleMaps  . NIWA 21152View Materials, 1 male (5.9 mm), 1 female (5.6 mm)  , NZOI Stn. J 59, 43.850°S, 179.417°E, 309 m, 20 May 1970GoogleMaps  . NIWA 21186View Materials, 1 female ov. (5.3 mm), 1 female (5.1 mm)  , NZOI Stn. V374, 43.861°S, 178.985°E 470 m, 13 Sep 1989GoogleMaps  . NIWA 21158View Materials, 1 male (4.8 mm)  , NZOI Stn. S 177, 43.890°S, 173.903°E, 400 m, 30 Oct 1979GoogleMaps  . NIWA 21287View Materials, 1 male (6.5 mm)  , NZOI Stn. G 200, 43.900°S, 179.733°W, 395 m, 19 Jan 1968GoogleMaps  . NIWA 19425View Materials, 1 male (6.5 mm), 1 female (5.5 mm)  , NZOI Stn. D 904, 43.975°S, 178.667°W, 459 m, 30 Mar 1969GoogleMaps  . NIWA 19420View Materials, 1 male (4.4 mm)  , NZOI Stn. S 173, 43.990°S, 174.033°E, 486 m, 30 Oct 1979GoogleMaps  . NIWA 21182View Materials, 1 male (7.5 mm)  , NZOI Stn. A 914, 44.067°S, 178.192°W, 455 m, 15 Sep 1963GoogleMaps  . NIWA 33687View Materials, 3 males (4.5, 4.6, 8.2 mm), 2 females (4.5, 6.8 mm), Stn. TAN 0705/181, 44.068–44.064°S, 178.549–178.540°W, 451–452 m, 18 Apr 2007GoogleMaps  . NIWA 21223View Materials, 1 female (7.6 mm)  , NZOI Stn. G 0239, 44.100°S, 179.000°W, 417 m, 01 Feb 1968GoogleMaps  . NIWA 21198View Materials, 1 male (7.3 mm)  , NZOI Stn. D 905, 44.133°S, 178.767°W, 607 m, 30 Mar 1969GoogleMaps  . NIWA 54020View Materials, 2 males (7.0, 7.4 mm), 1 female ov. (4.5 mm), Stn. TAN 0905/112, Diamondhead Peak A, Andes seamounts, 44.143– 44.147°S, 174.725–174.725°W, 760–821 m, 27 Jun 2009GoogleMaps  . NIWA 69775View Materials, 1 female (5.2 mm), Stn. TAN 0905/112, Diamondhead Peak A, Andes seamounts, 44.143–44.147°S, 174.725–174.725°W, 760–821 m, 27 Jun 2009GoogleMaps  . NIWA 53605View Materials, 15 specimens (not measured), Stn. TAN 0905/97, Diamond Head Seamount , 44.147–44.148°S, 174.69– 174.695°W, 440–600 m, 26 Jun 2009GoogleMaps  . NIWA 53956View Materials, 6 males (6.8–8.0 mm), 1 female ov. (6.7 mm), 6 females (4.0– 7.5 mm), Stn. TAN 0905/111, Diamondhead Peak C, Andes seamounts, 44.148–44.15°S, 174.691–174.694°W, 458–648 m, 27 Jun 2009GoogleMaps  . AWMM MA125790View Materials (ex NIWA 54082View Materials), 3 males (4.3, 5.2, 8.0 mm), 1 female (6.6 mm), Stn. TAN 0905/113, Diamondhead Peak B, Andes seamounts, 44.150–44.150°S, 174.757–174.761°W, 519–609 m, 27 Jun 2009GoogleMaps  . NIWA 69782View Materials, 1 male (8.5 mm), 1 female (7.8 mm), Stn. TAN 0905/105, Iceberg Seamount , 44.157– 44.159°S, 174.554–174.557°W, 485–533 m, 26 Jun 2009GoogleMaps  . NIWA 53773View Materials, 1 male (5.3 mm), 1 female ov. (7.6 mm), Stn. TAN 0905/103, Iceberg Seamount , 44.158–44.158°S, 174.555–174.559°W, 520–650 m, 26 Jun 2009GoogleMaps  . NIWA 54279View Materials, 11 males (5.0–9.0 mm), 18 females (4.1–8.2 mm), Stn. TAN 0905/119, Iceberg Seamount , 44.158–44.162°S, 174.555–174.552°W, 487–616 m, 28 Jun 2009GoogleMaps  . NIWA 117998View Materials, 1 male (4.4 mm), Stn. TAN 0905/119, Iceberg Seamount , 44.158–44.162°S, 174.555–174.552°W, 487–616 m, 28 Jun 2009GoogleMaps  . NIWA 21252View Materials, 1 female (2.9 mm)  , NZOI Stn. G 328, 44.167°S, 179.100°W, 439 m, 01 Feb 1968GoogleMaps  . NIWA 54199View Materials, 1 male (3.6 mm), 2 females (4.7, 6.9 mm), Stn. TAN 0905/116, Ritchie Hill summit, 44.175–44.173°S, 174.552–174.556°W, 716–745 m, 27 Jun 2009GoogleMaps  . NIWA 21290View Materials, 1 female ov. (8.8 mm)  , NZOI Stn. E422, 44.25°S, 175°E, 615 m, 15 Oct 1965GoogleMaps  . NIWA 21263View Materials, 1 female ov. (5.3 mm)  , NZOI Stn. V363, 44.250°S, 178.999°W, 540 m, 07 Sep 1989GoogleMaps  . NIWA 21187View Materials, 4 specimens (not measured)  , NZOI Stn. D 899, 44.383°S, 176.817°W, 370 m, 29 Mar 1969GoogleMaps  . NIWA 21275View Materials, 1 male (8.8 mm)  , NZOI Stn. Q25, 44.437°S, 176.640°W, 360 m, 22 Mar 1978GoogleMaps  . NIWA 21175View Materials, 1 female (7.3 mm)  , NZOI Stn. Q40, 44.492°S, 176.542°W, 345 m, 24 Mar 1978GoogleMaps  . NIWA 21164View Materials, 2 males (7.1, 7.5 mm)  , NZOI Stn. Q24, 44.495°S, 176.562°W, 320 m, 22 Mar 1978GoogleMaps  . NIWA 21171View Materials, 1 male (5.8 mm)  , NZOI Stn. E146, 44.5°S, 177°W, 664 m, 17 Oct 1964GoogleMaps  . NIWA 117996View Materials, 2 males (4.5, 4.7 mm), 1 female (4.5 mm), Stn. TAN 0705/111, 44.576–44.569°S, 176.079–176.086°W, 415– 265 m, 11 Apr 2007GoogleMaps  .

Canterbury Bight : NIWA 127194View Materials, 3 males (7.8, 8.1, 8.5 mm), 10 females (3.4–7.0 mm), RV Sonne Stn. SO 254/76 ROV 13, 45.027°S, 171.904°E, 678.3 m, 19 Feb 2017GoogleMaps  .

Southland: NIWA 10112View Materials, 2 males (5.2, 5.8 mm), 2 females (4.9, 5.5 mm), H284, Milford Sound , 44.635°S, 167.895°E, 281 m, 04 Feb 1971GoogleMaps  . NIWA 46413View Materials, 1 female (broken carapace), Z15317View Materials, Kellard, Doubtful Sound , 45.347°S, 167.020°E, 400 m, 23 Feb 2008GoogleMaps  . NIWA 10882View Materials, 1 female (3.5 mm)  , NZOI Stn. E 806, Chalky Inlet , 46.037°S, 166.583°E, 238 m, 21 Oct 1967GoogleMaps  . NIWA 21161View Materials, 1 male (8.4 mm)  , NZOI Stn. E 827, off Solander Island , 46.592°S, 166.742°E, 530 m, 24 Oct 1967GoogleMaps  . NIWA 21159View Materials, 1 female ov. (9.1 mm)  , NZOI Stn. E 827, off Solander Island , 46.592°S, 166.742°E, 530 m, 24 Oct 1967GoogleMaps  .

Bounty Plateau: NIWA 21178View Materials, 1 male (broken carapace)  , NZOI Stn. I 705, 47.5°S, 178.75°E, 390 m, 21 Mar 1973GoogleMaps  . NIWA 21296View Materials, 1 female ov. (7.5 m)  , NZOI Stn. S 70, 47.76°S, 178.513°E, 353 m, 26 Sep 1978GoogleMaps  . NIWA 127150View Materials, 1 male (6.0 mm)  , RV Sonne Stn. SO 254/58 AGT 02, West of Bounty Islands , 47.800°S, 178.639°E, 335–337 m, 13 Feb 2017GoogleMaps  . NIWA 21229View Materials, 1 male (9.8 mm)  , NZOI Stn. I 704, 48°S, 178.483°E, 475 m, 21 Mar 1979  . NIWA 21280View Materials, 1 female ov. (9.7 mm)  , NZOI Stn. S 64, 48.146°S, 179.878°E, 424 m, 25 Sep 1978GoogleMaps  . NIWA 21177View Materials, 1 male (6.3 mm)  , NZOI Stn. I 678, 48.167°S, 179.75°W, 457 m, 14 Mar 1979GoogleMaps  . NIWA 11055View Materials, 2 males (8.5, 9.8 mm), 1 female (6.5 mm)  , NZOI Stn. I 679, 48.167°S, 180°, 327 m, 15 Mar 1979  . NIWA 10111View Materials, 2 males (5.5, 6.7 mm), 3 females (4.7, 5.0, 9.0 mm)  , NZOI Stn. I 699, 48.267°S, 179°E, 532 m, 19 Mar 1979GoogleMaps  . NIWA 21251View Materials, 1 male (3.8 mm)  , NZOI Stn. T30, 48.348°S, 179.588°W, 720 m, 12 Mar 1981GoogleMaps  .

Campbell Plateau: NIWA 21151View Materials, 1 female ov. (8.5 mm)  , NZOI Stn. S14, 48.288°S, 168.702°E, 607 m, 13 Sep 1978GoogleMaps  . NIWA 127169View Materials, 1 male (5.0 mm)  , RV Sonne Stn. SO254/69 ROV 12, 49.098–49.098°S, 173.869–173.865°E, 539.7, 540 m, 17 Feb 2017GoogleMaps  . NIWA 21181View Materials, 1 female (5.8 mm)  , NZOI Stn. F105, 49.575°S, 170.950°E, 499 m, 20 Jan 1965GoogleMaps  . NIWA 21276View Materials, 1 female ov. (7.2 mm)  , NZOI Stn. S16, 49.833°S, 170.233°E, 593 m, 14 Sep 1978GoogleMaps  . NIWA 21270View Materials, 2 males (6.0, 8.3 mm), 2 females (6.8, 7.3 mm)  , NZOI Stn. S22, 50.650°S, 167.660°E, 400 m, 17 Sep 1978GoogleMaps  . NIWA 21162View Materials, 4 males (4.7–10.7 mm), 4 females (4.0– 8.5 mm)  , NZOI Stn. F136, 51.333°S, 172.700°E, 547 m, 30 Jan 1965GoogleMaps  . NIWA 21230View Materials, 1 female (6.9 mm)  , NZOI Stn. F148, 51.717°S, 173.533°E, 677 m, 02 Feb 1965GoogleMaps  . NIWA 21163View Materials, 1 male (8.4 mm), 2 females (8.0, 8.4 mm)  , NZOI Stn. F147, 52.350°S, 173.150°E, 611 m, 01 Feb 1965GoogleMaps  . NIWA 10883View Materials, 1 female (4.3 mm)  , NZOI Stn. F 146, 53°S, 172.75°E, 435 m, 01 Feb 1965  . NIWA 21228View Materials, 1 male (7.3 mm)  , NZOI Stn. S51, 53.265°S, 172.768°E, 501 m, 22 Sep 1978GoogleMaps  . NIWA 21268View Materials, 1 male (8.2 mm), 2 females ov. (8.5, 7.6 mm)  , NZOI Stn. S48, 53.510°S, 172.400°E, 625 m, 22 Sep 1978GoogleMaps  . NIWA 10115View Materials, 1 male (7.6 mm)  , NZOI Stn. G927, 53.547°S, 172.277°E, 580 m, 12 Jan 1971GoogleMaps  . AM P92564View Materials, 1 male (6.9 mm), 2 females (5.7, 8.7 mm)  , RV Dimitry Mendeleev Cruise 16 Stn 1277, E of Auckland Islands, 51.000°S, 169.983°E, 570 m, 15 Jan 1976GoogleMaps  .

New South Wales, Australia: AM P21124View Materials, 1 female (3.1 mm), K 75-06-04  , SE of Crowdy Head , 31.917–31.950°S, 153.133–153.117°E, 403–549 m, among sponges, 10 Sep 1975GoogleMaps  . AM P66665View Materials, 2 females (3.0, 3.1 mm), 4.8–6.4 km off Eden , 37.053°S, 150°E, 46–55 m, ST Goonambee, coll. A.A. Livingstone & H.O. Fletcher, May 1922GoogleMaps  . AM P66666View Materials, 1 female (7.0 mm), off Botany Bay , 34°S, 151.25°E, coll. J.C. Jones.GoogleMaps  AM G5669, 1 male (6.6 mm), 1 female ov. (5.9 mm), 2 females (6.1, 6.2 mm), off Botany Bay , 34.00°S, 151.25°E, coll. J.C. Jones, 18 Sep 1906GoogleMaps  .

Victoria, Australia: AM E6158, 1 male (4.0 mm)  , S of Cape Everard, FIS Endeavour , 37.8°S, 149.267°E, 273 m.GoogleMaps  AM P17563View Materials, 2 males (3.1, 3.2 mm)  , 1 female  2.9 mm), SW of Mount Cann , 38.25°S, 148.717°E, 128–183 m.GoogleMaps 

Tasmania, Australia: AM E6170, 1 female (6.4 mm), about 25 km SE of St Helens Point , 41.435°S, 148.571°E, 110 m.GoogleMaps  AM P15817View Materials, 5 males (4.7– 2.7 mm), 1 female ov. (2.9 mm), “off coast”, 182 m, coll. C. Hedley. 

Diagnosis. Rostrum lateral margins straight or very slightly convex (in small specimens); subapical spines present. Carapace with transverse row of 4 epigastric spines; anterior metagastric ridge continuous, not medially interrupted. Abdominal tergite 3 with anterior and posterior transverse ridges. Thoracic sternite 3 anterior margin biconcave, with obtuse median projection. Antennular article 1 with 4 well-developed spines and minute second lateral spine: distomesial spine long, approximately reaching level of lower distolateral spine, distinctly overreached by upper distolateral and first lateral spines; second (proximal) lateral spine minute. Antennal article 1 mesial process distally reaching at least to level of second lateral antennular spine; article 2 distolateral spine distinctly larger than minute distomesial spine (if present). Article 3 distolateral spine minute or absent. Maxilliped 3 merus with 1 prominent spine on flexor margin. P2–4 dactylus extensor margin without upright spines at bases of movable spines.

De s cription. Carapace: Length 0.9–1.0 × width; transverse ridges with dense short setae, and few scattered longer iridescent setae. Gastric region with 4 or 5 transverse ridges: 1 epigastric ridge of short scales, with 4 prominent spines in transverse row; 1 anterior protogastric ridge, uninterrupted and extending laterally to carapace margin; 1 medially uninterrupted mesogastric ridge, interrupted laterally by cervical groove; 1 anterior metagastric ridge, medially not usually interrupted, laterally interrupted by cervical groove; posterior gastric ridges short, scalelike. Mid-transverse ridge uninterrupted, preceded by shallow cervical groove, followed by 2 complete, uninterrupted ridges, intervened by 3 short lateral ridges and short, scale-like striae. Lateral margins medially convex, with 8 spines: 2 (anterolateral, hepatic) spines in front of and 6 spines (3 anterior branchial, 3 posterior branchial) behind distinct anterior cervical groove. Anterolateral spine largest of marginal spines, over-reaching lateral orbital spine. Hepatic spine small, set slightly mesially from lateral margin. Anterior branchial spines subequal in size. Posterior branchial spines with first spine subequal to anterior branchial spines, progressively smaller posteriorly. Rostrum 0.5–0.8 [0.7] × pcl, length-width ratio 2.3–[2.4], distance between basal rostral spines about 0.3 × carapace width; posterodorsal surface slightly concave, tip of rostrum upturned; lateral margin nearly always straight, only slightly convex even in smallest specimens ( Fig. 8LView FIGURE 8), with distinct pair of sub-apical spines. Pterygostomian flap with small anterior spine; surface unarmed, with series of short striae.

Thoracic sternum: Sternal plastron slightly wider than long (length-width ratio about 0.8), lateral margins divergent posteriorly. Sternite 3 width [2.0]–2.8 × length; anterior margin biconcave, with low, obtuse median projection, anterolaterally rounded or with small granule. Sternite 4 surface with short striae.

Abdomen: Tergites 2 and 3 with 2 well-defined, uninterrupted transverse ridges; tergite 4 with anterior ridge only; tergites 5 and 6 smooth, without elevated ridges.

Eye: Length about 1.4 × width, peduncle distally setose, not expanded proximally, with few short transverse striae on lateral surface; cornea not dilated.

Antennule: Article 1 with 4 well-developed distal spines, distomesial spine long, approximately reaching lower distolateral spine; paired distolateral spines present; proximal lateral spine small to obsolescent.

Antenna: Article 1 with prominent mesial process, distally distinctly overreaching peduncle and at least reaching level of lateral spine of antennule. Article 2 with distinct lateral spine, barely reaching midlength of article 3; mesial margin angular or with small spine distally. Article 3 with minute lateral spine or angular distally; mesial margin unarmed. Article 4 unarmed.

Maxilliped 3 (Mxp3): Ischium with pronounced distal spines on both flexor and extensor margins; crista dentata with regular row of spines along entire margin. Merus slightly shorter than ischium at midline, with strong distal spines on extensor margins, subequal in size to spine at midlength on flexor margin, otherwise unarmed.

Cheliped: Subcylindrical, spiny, usually sparsely covered with setae; length 3.0–6.4 [4.0, 4.1] × pcl (males), 2.9–4.3 (females), 3.4–3.8 (ovigerous females); larger specimens generally with longer chelipeds. Ischiomerus 1.0– 2.5 [1.8] × pcl, proportionally longer with increasing body size, 2.2–3.7 [2.7, 2.8] × carpus length; with rows of spines, lateral and distal spines strongest. Carpus with rows of spines except on ventral surface, 1 or 2 lateral spines most prominent. Propodus palm 1–2 [1.6] × carpus length, length-width ratio 2.0–4.0 [2.6, 2.7], with 4 parallel rows of spines (2 mesial, 1 near dorsal midline, 1 close to lateral margin, with 1 or 2 spines on proximal portion of pollex. Dactylus [0.8]–1.1 × palm length; with row of spines along lateral crest; distally with row of spines along curved margin; tip excavated.

Walking legs (P2–4): Relatively robust, subcylindrical, moderately setose and spinose. Merus successively shorter posteriorly (P2 merus 1.1 × P3 merus length, P3 merus 1.2 × P4 merus length). P2 merus 0.7–1.0 [0.9] × pcl; 1.2 × P2 propodus length; length about 5 × width. P3 merus 1.0–1.1 × P3 propodus length; length about 4.5 × width. P4 merus 0.8–1.0 [0.9] × P4 propodus length; length about 4 × width. Extensor margins of P2 and P3 with regular rows of spines, proximally diminishing, with prominent distal spines; P4 extensor margin irregular but unarmed; distally with distinct spine; ventral margins irregular and with strong distal spine on all legs; P4 lateral surface with median row of [3] or 4 small spines, absent on other legs. Carpus extensor margin with 3 or 4 spines on P2–3, less pronounced or just irregular on P4; distal spine prominent on all legs; lateral row of 2–4 spines below extensor margin of all legs; flexor margin unarmed. P2–4 propodus length about 6 × height; extensor margin with few proximal spines on P2–3, small or absent on P4; flexor margin with 4 or 5 movable spines in addition to distal pair, size ranging from [slender] to robust. Dactyli 0.6 × propodus length, ending in incurved, strong, sharp spine; flexor margin with 9–[11] movable spines, otherwise unarmed.

Eggs: Eggs at various developmental stages were noted, in all cases having a diameter of 0.4–0.6 mm. Clutch size is estimated at 100 to many hundreds.

Colour in life. Body pale to light peach base colour, legs nearly transparent, lateral margins of carapace, abdomen and rostrum distinctly orange; major spines on chelipeds and carapace same orange colour, tips white. Darker orange patches arranged along centre of abdomen ( Fig. 15BView FIGURE 15).

Parasites. Thirty-six specimens (~9% infestation rate) bore a single bopyrid in the lateral branchial cavity, and one specimen (NIWA 21194 male) had a bopyrid on both sides. Two specimens (0.5% infestation rate) had a kentrogonid rhizocephalan externa visible under the abdomen.

Association. Found on hydroids, in sponges and on rocks using the ROV KIEL6000 during the RV Sonne PoribacNewZ voyage (NIWA 127194).

Size range. Male pcl 3.0– 10.7 mm, female pcl 2.2–9.7 mm (smallest female, NIWA 33681, confirmed by DNA), ovigerous female pcl ≥ 2.9 mm.

Genetic data. COI sequences from 12 specimens of P. nui  n. sp. (holotype NIWA 33657 and paratypes and non-types from NIWA 24566, 33658, 33681, 33682, 33687, 33723 and 42691) were ≤ 1.5% divergent. Phylladiorhynchus nui  n. sp. is sister to a clade containing P. australis  n. sp., from which it is about 8% divergent. These two species are morphologically most similar, and they are both distributed across the entire New Zealand continental shelf, but it appears that they are bathymetrically largely separated (see below).

Etymology. Nui is the Polynesian (including Māori) term for large, referring to the comparably large body size of this species; used as a noun in apposition.

Di s tribution. Southeastern Australia from New South Wales, Victoria and Tasmania, and around the entire New Zealand continental shelf, from the Northland shelf to the Chatham and Campbell Rise on the eastern and the fjords and Challenger Plateau on the western side, 46–1246 m, typically deeper than 200 m ( Fig. 3View FIGURE 3 inset).

Remarks. Phylladiorhynchus nui  n. sp. is the most common species of the genus in New Zealand, with samples from more than 150 stations examined here, representing more than 450 specimens. Of these specimens, 376 have been sexed and measured, the overall sex ratio is nearly 1:1 (47% male, 53% female) with 62 of the 199 examined females ovigerous. Nineteen specimens from Australia are reported here, some of which were studied by Haig (1973) and Ahyong & Poore (2004) from Victoria, New South Wales and Tasmania, but these also include two specimens collected from an atypically shallow location (46–55 m) off Eden, New South Wales (AM P66665View Materials). In the New Zealand region, P. nui  is nearly always collected at depths exceeding 200 m ( Fig. 3View FIGURE 3 inset).

Phylladiorhynchus nui  shows some notable morphological variability in the size of the movable spines on the walking leg propodi. The holotype represents the more typical form with comparatively small, slender, similarlysized spines along the propodal flexor margin. In about 15% of the specimens, however, one or more of the distal flexor propodal spines may be significantly enlarged ( Fig. 9View FIGURE 9), and this condition does not appear to correlate with size or sex. The position of the enlarged spines and the leg on which these might appear varies, and specimens bearing both the slender and enlarged spines are often collected from the same station. We have not observed similar variation in any other species of Phylladiorhynchus  but consider such variation as intraspecific given the co-ocurrence of normal and enlarged-spine forms in both Australia and New Zealand, and the minimal COI sequence divergence between forms (~1%) (compare Fig. 8KView FIGURE 8, holotype, with Fig. 9E and FView FIGURE 9 that have been sequenced).

More typical variation includes the size and proportional length of the cheliped, ranging from 2.7 to 6.3 × pcl, with that of males more robust than in females. Interestingly, the cheliped fingers may be gaping in one male and not in a similarly-sized male from the same sample. For example, NIWA 21164 includes a male (7.1 mm) with palm 4.0 times as long as wide and without gaping fingers, and a male (7.5 mm) with distinctly gaping fingers and palm 2.0 times as long as wide. Such differences are in part allometric but may also be related to male-male mate competition ( Claverie & Smith 2007, 2010).

Phylladiorhynchus nui  n. sp. belongs to the group of species of the ‘ pusillus  ’ group, that have at least two pairs of epigastric spines, three spines in the anterior branchial region along the lateral carapace margin and a single mesial spine on the maxilliped 3 merus. Phylladiorhynchus nui  n. sp. is distinctive in the following combination of characters:

- the lateral margins of the rostrum are nearly straight, even in the smallest specimens ( Fig. 8LView FIGURE 8) (distinctly convex in both P. pusillus  and P. australis  n. sp.)

- the anterior metagastric ridge is nearly always continuous in both P. nui  and P. australis  (distinctly broken medially, creating two gentle arches in P. pusillus  )

- the base of the antennule has only a very small or obsolescent lateral spine (small but always distinct in both P. pusillus  and P. australis  n. sp.)

- the mesial margins of antennal articles 2 and 3 are usually unarmed, at most with a distomesial granule (article 2 has a distinct mesial spine in P. pusillus  and a small but distinct spine in P. australis  n. sp.)

- the anterior margin of sternite 3 is distinctly scalloped in both P. nui  and P. australis  (convex and serrated in P. pusillus  )

- the cheliped dactylus always has a row of spines along the extensor margin (both P. pusillus  and P. australis  have only a single proximal spine)

- P. nui  is overall much larger, pcl up to 10.7 mm, which overlaps but far exceeds the size range of P. australis  (≤ 6.1 mm) and P. pusillus  (≤ 4.4 mm).

Phylladiorhynchus nui  is an atypically deeply occurring species of the genus (down to 1246 m) considering the usual bathymetric range of other congeners, which seldom exceed 500 m ( Baba et al. 2008). The median depth is 490 m for P. nui  , compared to around 100 m for both P. australis  and P. pusillus  . The only other species known from comparable depths are P. ikedai  , reported down to 510 m off New Caledonia ( Baba 1991), P. erebus  n. sp., here reported from 506 m, and P. spinosus  n. sp., from 570 m from off Norfolk Island.

TAN

TAN

NZOI

NZOI

KAH

KAH

NHMUK

NHMUK

AWMM

AWMM

ROV

ROV

AGT

AGT

FIS

FIS

NZOI

New Zealand Oceanographic Institute

NHMUK

Natural History Museum, London

RV

Collection of Leptospira Strains

AM

Australian Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Galatheidae

Genus

Phylladiorhynchus

Loc

Phylladiorhynchus nui

Schnabel, Kareen E. & Ahyong, Shane T. 2019
2019
Loc

Phylladiorhynchus pusillus

Haig, J. 1973: 282
Loc

Phylladiorhynchus cf. pusillus

Ahyong, S. T. 2007: 42