Deep-sea spider crabs of the family Epialtidae MacLeay, 1838, from Papua New Guinea, with a redefinition of Tunepugettia Ng, Komai & Sato, 2017, and descriptions of two new genera (Crustacea: Decapoda: Brachyura: Majoidea) Author Lee, Bee Yan Author Forges, Bertrand Richer De Author Ng, Peter K. L. text Zootaxa 2019 2019-06-18 4619 1 1 44 journal article 26462 10.11646/zootaxa.4619.1.1 9aaf6711-748d-4067-a759-26d37802b7fc 1175-5326 3248363 CA6AEB18-2F97-449C-AE34-E1509DFFC841 Tunepugettia corbariae n. sp. ( Figs. 10A , 11 D–F, 12A–D) Material examined. Holotype : male (31.4 × 21.2 mm ) (MNHN-IU-2014-9773), stn CP4334, Ainto Bay , southeast New Britain , Solomon Sea , Papua New Guinea , 06°08’S 149°10’E , 430–620 m , coll. MADEEP Expedition, 6 May 2014 . Paratypes : 2 males (31.0 × 19.7 mm , 23.7 × 15.3 mm ) ( ZRC 2018.1491 , ex. MNHN-IU- 2011-2506 ), stn CP3681, Vitu Islands , Papua New Guinea , 04°38’S 149°27’E , 564–712 m , coll. BIOPAPUA , 27 September 2010 .— 1 female [photographed] (35.1 × 24.1 mm ) ( ZRC 2018.1492 , ex. MNHN-IU-2013-3043), stn CP4339, Ainto Bay , southeast New Britain , Solomon Sea , Papua New Guinea , 06°10’S 149°18’E , 510–743 m , coll. MADEEP Expedition , 7 May 2014 .— 1 ovigerous female (37.2 × 25.5 mm ) ( ZRC 2018.1493 , ex. MNHN-IU-2013-3330), stn CP4445, New Ireland , Papua New Guinea , 02°15’S 150°17’E , 342 –380 m , coll. KAVIENG 2014, 1 September 2014 .— 1 female (29.4 × 18.2 mm ) (MNHN-IU-2011-3293), stn CP3690, southeast point of Manus Island , Papua New Guinea , 02°14’S 147°16’E , 611–618 m , coll. BIOPAPUA , 29 September 2010 .— 1 ovigerous female (36.0 × 23.1 mm ) ( ZRC 2018.1494 , ex. MNHN-IU-2013-3019), stn CP4338, southeast New Britain , Solomon sea, Papua New Guinea , 06°06’S 149°17’E , 410–614 m , coll. MADEEP Expedition , 7 May 2014 .— 1 female (17.0 × 10.2 mm ) (MNHN-IU-2011-1584), stn CP3774, Jacquinot Bay , New Britain , Papua New Guinea , 05°35’S 151°35’E , 470–680 m , coll. BIOPAPUA , 16 October 2010 .— 1 female (19.5 × 12.6 mm ) (MNHN-IU-2011-2008), stn CP3707, off the coast of Madang , Papua New Guinea , 04°59’S 145°50’E , 460–466 m , coll. BIOPAPUA , 2 October 2010 .— 1 male [photographed] (22.8 × 14.4 mm ) (MNHN-IU- 2013-2352 ), stn CP4266, Papua New Guinea , 04°35’S 152°25’E , 575–616 m , coll. 24 April 2014 .—1 ovigerous female (36.5 × 25.2 mm ), 1 female (29.1 × 19.1 mm ) (MNHN-IU- 2013-15486), stn CP3964, east Malamal Passage , Papua New Guinea , 05°07’S 145°50’E , 527–539 m , coll. PAPUA NIUGINI , 30 November 2012 .— 1 male (33.1 × 23.0 mm) (MNHN-IU-2011-1526), stn CP3635, south of Lae , Gulf of Huon , Papua New Guinea , 07°29’S 147°33’E , 280–302 m , coll. BIOPAPUA , 23 August 2010 .— 1 female (23.2 × 15.3 mm ) (MNHN-IU-2013-15326), stn CP4008, southeast Tuam Island , Solomon Sea , Papua New Guinea , 06°04’S 148°10’E , 500–555 m , coll. PAPUA NIUGINI , 11 December 2012 .— 1 male (15.5 × 9.6 mm ) (MNHN- IU-2013-15325), stn CP3970, west Karkar Island , Bismarck Sea , Papua New Guinea , 04°39’S 145°52’E , 573 m , coll. PAPUA NIUGINI , 4 December 2012 .— 1 female (26.3 × 16.0 mm) (MNHN-IU-2013-15330), stn CP3981, north of Long Island , Bismarck Sea , Papua New Guinea , 05°11’S 147°03’E , 688 m , coll. PAPUA NIUGINI , 6 December 2012 . – 1 female (27.8 × 17.8 mm ) (MNHN-IU-2013-15329), stn CP4050, west Kairiru Island , Bismarck Sea , Papua New Guinea , 03°18’S 143°27’E , 495–510 m , coll. PAPUA NIUGINI , 19 December 2012 .— 1 female with Sacculina (26.0 × 17.2 mm ) (MNHN-IU-2013-15327), stn CP4006, southeast Tuam Island , Solomon Sea , Papua New Guinea , 06°03’S 148°08’E , 440–475 m , coll. PAPUA NIUGINI , 11 December 2012 .— 1 female (30.1 × 19.7 mm ) (MNHN-IU-2013-15328), stn CP3970, west Karkar Island , Bismarck Sea , Papua New Guinea , 04°39’S 145°52’E , 573 m , coll. PAPUA NIUGINI , 4 December 2012 .— 1 male (27.8 × 18.5 mm ) (MNHN-IU-2013-585), stn CP3962, west Rempi area, Papua New Guinea , 04°59’S 145°51’E , 598–614 m , coll. PAPUA NIUGINI , 29 November 2012 .— 1 male (12.5 × 7.6 mm ) (MNHN-IU-2011-1413), stn CP3780, Wide Bay , Papua New Guinea , 05°05’S 152°02’E , 782–1085 m , coll. BIOPAPUA , 17 October 2010 .— 1 female (10.5 × 6.6 mm ) (MNHN-IU- 2014-19097), stn CP4449, New Ireland , Papua New Guinea , 02°10’S 150°11’E , 623–908 m , coll. KAVIENG 2014, 1 September 2014 .— 1 female (11.8 × 7.5 mm ) (MNHN-IU-2011-907), stn CP3647, off coast of Lae , Gulf of Huon , Papua New Guinea , 06°47’S 147°12’E , 592–660 m , coll. BIOPAPUA , 25 August 2010 . FIGURE 10. Color in life. A, Tunepugetia corbariae n. sp. , paratype. male (22.8 × 14.4 mm) (MNHN-IU-2013-2352), Papua New Guinea; B, Crocydocinus ewok n. sp. , paratype, male, (19.7 × 13.4 mm) (MNHN-IU-2013-1517), Papua New Guinea; C, C . porg n. sp. , holotype, female (28.5 × 19.3 mm) (MNHN-IU-2013-3042), Papua New Guinea; D, Neophrys inopinata n. sp. , holotype, ovigerous female (27.1 × 19.2 mm) (MNHN-IU-2013-3022), Papua New Guinea. Diagnosis. Carapace pyriform, covered with layer of setae and long tufts of setae on edge of gastric region and lateral margins of carapace ( Figs. 10A , 11D ). Postorbital lobe flattened at side, protecting eye. Carapace regions well defined with granules on each swollen region; hepatic spine swollen basally; gastric region swollen with 3 granules, 1 granule on metagastric region, and 2 granules on lower margin of protogastric region; cardiac region with large swollen granule; lateral spine swollen basally with another granule above ( Fig. 11D, 11F ). Antennal flagellum equal to or slightly longer than pseudorostral spines. Basal antennal article longer than broad, with blunt distal angle and convex edge. Pterygostomial region with 3 granules on outer margin ( Fig. 11E ). Cheliped slender, propodus carinate; carpus carinate on margin; merus triangular in cross-section, carinate on all margins. Ambulatory legs covered with setae, with margins of segments carinate. Male thoracic sternum slightly depressed anteriorly; sternites 3 and 4 lateral margins constricted slightly, surface concave ( Fig. 11E ). Male pleon triangular, all 6 somites and telson free ( Fig. 11E ). G1 straight with distal tip composed of 2 lobes ( Fig. 12 A–D). Etymology. The species is named in honour of our colleague, Laure Corbari, curator of Crustacea in the MNHN , and cruise leader of the MADEEP Expedition aboard R.V. “ Alis ”. Coloration. Carapace and cheliped orange to pale pink; ambulatory legs white ( Fig. 10A ). Type locality. Ainto Bay , southeast New Britain , Papua New Guinea Remarks. Tunepugettia corbariae n. sp. differs from T . sagamiensis in the following characters: the pseudorostral spines of T . corbariae n. sp. are not fused along the proximal third of their length ( Fig. 11D ) (versus fused on proximal one-third to two-fifths in T . sagamiensis ; Fig. 11A ); the gastric region is distinctly swollen with the lateral spine swollen basally with another granule above it ( Fig. 11D ) (versus gastric region slightly swollen with the lateral spine not swollen basally with absent of granule above in T . sagamiensis ; Fig. 11A ); and the G1 has the bifid angle not as strong and distinct ( Fig. 12 A–D) (versus strong and distinct in T . sagamiensis ; cf. Ng et al . 2017 : fig. 7A–C). Tunepugettia corbariae n. sp. is currently only known from its type locality, Papua New Guinea .