Tunepugettia corbariae, Lee & Forges & Ng, 2019

Lee, Bee Yan, Forges, Bertrand Richer De & Ng, Peter K. L., 2019, 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), Zootaxa 4619 (1), pp. 1-44 : 21-23

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 .

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.

Figures

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.

FIGURE 11. A–C, Tunepugettia sagamiensis (Gordon, 1930), male (46.0 × 31.0 mm) (ZRC 2016.0183), Japan. A, overall dorsal view; B, overall ventral view; C, lateral view of carapace. D–F, T. corbariae n. sp., holotype, male (31.4 × 21.2 mm) (MNHN-IU-2014-9773), Papua New Guinea. D, overall dorsal view; E, overall ventral view; F, lateral view of carapace.

FIGURE 12. Tunepugettia corbariae n. sp., holotype, male (31.4 × 21.2 mm) (MNHN-IU-2014-9773), Papua New Guinea, left G1. A, ventral view; B, ventral view of distal portion; C, dorsal view; D, dorsal view of distal portion.