Tenagopelta potens (Davie & Richer de Forges, 2013 ), Davie & Richer de Forges, 2013

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182: 83-84

publication ID

http://doi.org/10.11646/zootaxa.4209.1.1

publication LSID

lsid:zoobank.org:pub:849BAB5C-464A-4B4A-A586-5742411EDC01

DOI

http://doi.org/10.5281/zenodo.5617197

persistent identifier

http://treatment.plazi.org/id/F16BFB33-FFF1-FFA8-FF6A-FF49FE23FB26

treatment provided by

Plazi

scientific name

Tenagopelta potens (Davie & Richer de Forges, 2013 )
status

n. comb.

Tenagopelta potens (Davie & Richer de Forges, 2013)   n. comb.

( Figs. 17 View FIGURE 17 E–G; 26H; 33I; 47E–J; 54H; 61G; 79K–O)

Hephthopelta potens Davie & Richer de Forges, 2013: 795   , figs. 1–4 [type localilty: Australia, Queensland].

Type material. Holotype male (10.3 × 12.7 mm) (QM-W16974), Australia, Queensland, off Tully Heads, CSIRO, Soela , 17°59'02”S, 147°03'01"E, trawl, 260 m, 13.01.1986. GoogleMaps  

Paratypes: 1 female (6.2 × 7.1 mm) (QM-W17046), Australia, Queensland, off Babinda, 17°21'8”S, 146°48'5"E, epibenthic sled, 296–302 m, Franklin , 15.05.1986 GoogleMaps   .— CSIRO, Soela: 1 female (9.7 × 11.9 mm) (QM- W17047 View Materials ), Queensland, off Tully Heads , 17°59'09”S, 147°02'09"E, trawl, 250–252 m, 29.11.1985 GoogleMaps   ; 1 female (6.6 × 7.6 mm) (QM-W17048), Queensland, off Mission Beach , 17°54'03”S, 146°55'07"E, trawl, 212 m, 09.12.1985 GoogleMaps   ; 1 female (10.5 × 13.1 mm) (QM-W16999), Queensland, off Yeppoon , 22°56'01”S, 152°41'04"E, trawl, 225–282 m, 19.11.1985 GoogleMaps   ; 1 male (9.2 × 11.0 mm) (QM-W17049), Queensland, off Tully Heads , 18°07’S, 147°02'02"E, trawl, 220 m, 18.01.1986 GoogleMaps   ; 2 females (7.1 × 8.2 mm, 7.3 × 8.5 mm) (QM-W17050), Queensland, off Tully Heads , 18°02’S, 147°01'06"E, trawl, 220–222 m, 12.01.1986 GoogleMaps   ; 1 male (9.1 × 11.1 mm) (QM-W17051), Queensland, off Tully Heads , 18°01’S, 147°01'03"E, trawl, 224–228 m, 0 9.01.1986. GoogleMaps  

Other material examined. Papua New Guinea. BIOPAPUA: 1 female (MNHN-IU-2014-12812), South East Point   , Gulf of Huon, stn CP3629, 06°57’S, 147°08’E, 240–269 m, 22.08.2010; 1 male (10.3 × 12.1 mm) GoogleMaps   , 1 female (11.3 × 13.1 mm) ( ZRC 2015.241 View Materials , ex MNHN-IU-2014-12813), Southeast Point, Gulf of Huon, stn CP3634, 07°29’S, 147°31’E, 279–290 m, 23.08.2010 GoogleMaps   ; 1 male (11.8 × 13.8 mm), 1 female (9.5 × 11.3 mm) (MNHN-IU- 2014-12814), 2 males (8.8 × 10.0 mm, 12.5 × 14.0 mm) ( ZRC 2015.242 View Materials ), Southeast Point, Gulf of Huon, stn CP3635, 07°29’S, 147°33’E, 280–302 m, 23.08.2010 GoogleMaps   ; 1 juvenile female (MNHN-IU-2014-12815), Open Bay , stn CP3664, 04°50’S, 151°38’E, 195–340 m, 23.09.2010 GoogleMaps   ; 1 female (MNHN-IU-2014-12816), Open Bay , stn CP3665, 04°50’S, 151°38’E, 225-340 m, 23.10.2010 GoogleMaps   ; 1 female (MNHN-IU-2014-12817), off Sepik River, stn CP3701, 03°57’S, 144°41’E, 198–219 m, 0 1.10.2010 GoogleMaps   . PAPUA NIUGINI 2012: 1 female (MNHN-IU-2013-9014), Dampier Strait, Salomon Sea, stn CP4014, 05°35’S, 148°13'E, 630–870 m, 12.12.2012 GoogleMaps   ; 1 male (13.1 × 14.2 mm), 1 female (15.2 × 16.6 mm) (MNHN-IU-2013-9015), Astrolabe Bay , stn CP4028, 05°22’S, 145°47'E, 300–320 m, 14.12.2012 GoogleMaps   ; 1 male (MNHN-IU-2013-9158), N.Vanimo, Bismarck Sea, stn CP4062, 02°37’S, 141°18'E, 500–580 m, 21.12.2012.

Vanuatu. SANTO 2006: 1 male (5.0 × 5.4 mm) ( ZRC 2015.186 View Materials ) [photographed], mislabeled station, waters outside Tutuba I., in excess of 100 m depth water, 18.10.2006.  

New Caledonia. HALIPRO 1: 1 female (7.4 × 8.5 mm) (MNHN-IU-2013-9469), eastern New Caledonia , stn CP868, 21°14.539’S, 165°55.847’E, 430–450 m, 23.03.1994 GoogleMaps   ; 1 female (MNHN-IU-2013-9076), stn CP850, 21°43.6’S, 166°39.4’E, 541–580 m, 19.03.1994.— EXBODI: 2 females (MNHN-IU-2011-7302), Havannah Canal , stn CP3791, 22°15’S, 167°19’E, 750–863 m, 03.09.2011 GoogleMaps   ; 1 male, 1 female (MNHN-IU-2011-7512), Havannah Canal , stn CP3792, 22°18’S, 167°22’E, 850–876 m, 03.09.2011 GoogleMaps   ; 1 ovigerous female (MNHN-IU-2011-7378), Thio , stn CP3796, 21°32’S, 166°21’E, 434–455 m, 04.09.2011; 1 female (MNHN-IU-2013-1968) [photographed] GoogleMaps   , 1 female (MNHN-IU-2013-1969), Thio , stn CP3799, 21°33’S, 166°20’E, 461–466 m, 04.09.2011 GoogleMaps   ; 1 female (MNHN-IU-2011-7594), 1 female (MNHN-IU-2011-8190), Thio , stn CP3800, 21°32’S, 166°22'E, 279–282 m, 04.09.2011 GoogleMaps   ; 1 male (MNHN-IU-2011-7297), Toupeti , stn CP3808, 21°43’S, 166°39’E, 598–645 m, 05.09.2011 GoogleMaps   ; 4 females (MNHN-IU-2011-8560), Pass at Ounia, stn CP3826, 21°52’S, 166°51’E, 354–509 m, 07.09.2011 GoogleMaps   ; 1 male (MNHN-IU-2011-7755), Pass at Ounia, stn CP3827, 21°58’S, 166°57’E, 220–232 m, 08.09.2011 GoogleMaps   ; 1 female (MNHN-IU-2011-8474), large pass at Yaté , stn CP3837, 22°10’S, 167°15’E, 496–504 m, 09.09.2011 GoogleMaps   ; 1 male (MNHN-IU-2011-6498), large pass at Sarcelle , stn CP3842, 22°23’S, 167°22’E, 756–769 m, 10.09.2011 GoogleMaps   ; 1 male (MNHN-IU-2011-7885), 1 female (MNHN-IU-2011-8649), large pass at Sarcelle , stn CP3844, 22°20’S, 167°22’E, 815–970 m, 10.09.2011 GoogleMaps   .

Diagnosis. Carapace ( Fig. 17 View FIGURE 17 E‒G) subtrapezoidal, globose, 1.1‒1.2 wider than long; dorsal, ventral surfaces, pereiopods covered by short tomentum, dorsal surface granular; front bilobed; anterolateral margins arcuate, granular, without distinct lobes or teeth. Eye peduncle ( Fig. 26 View FIGURE 26 H) filling orbit, short, mobile, cornea reduced. Posterior margin of epistome ( Fig. 26 View FIGURE 26 H) with broad semicircular median lobe with median fissure, semicircular lateral margins. Third maxilliped ( Fig. 33 View FIGURE 33 I) merus subquadrate, ischium rectangular, slightly longer than merus. Proportionally long ambulatory legs ( Fig. 17 View FIGURE 17 E‒G), folded P5 reaching beyond front, covered by tomentum; P5 merus 0.8 cl. Chelipeds ( Figs. 17 View FIGURE 17 E‒G; 47E‒J) subequal in length, covered by short tomentum, slightly dissimilar in females, heteromorphic in males; fingers of minor   chela ( Fig. 47 View FIGURE 47 F, J) subcircular in cross-section, scissor-like, cutting margins with distinct teeth; major chela of males ( Fig. 47 View FIGURE 47 E, I) with enlarged teeth. Outer surface of adult male major chela with prominent swelling on median surface adjacent to dactylus ( Fig. 47 View FIGURE 47 G, H). Outer margin of ventral surface of cheliped merus with 3 large acute teeth. Inner margin of cheliped carpus with large pointed tooth ( Fig. 17 View FIGURE 17 E–G). Fused thoracic sternites 1, 2 ( Fig. 54 View FIGURE 54 H) semicircular, broad, long. Male pleon ( Figs. 54 View FIGURE 54 H; 61G) with proportionally short telson. G1 ( Fig. 79 View FIGURE 79 K‒N) stout, distal part relatively short, stout, curved inwards, with short spinules; tip truncate. G2 ( Fig. 79 View FIGURE 79 O) longer than G1, curved, slender, distal segment long, curved. Female telson proportionally short. Vulvae relatively close together, located on steep outer margin of thoracic sternite 6 close to suture 5/6.

Remarks. Specimens from northern Queensland, Australia, are relatively smaller compared to other material from Papua New Guinea and New Caledonia, but all have a distinct swelling on the outer surface of the major male chela ( Fig. 47 View FIGURE 47 G, H), usually visible even in medium-sized specimens. The smaller Papua New Guinea male specimens do not possess this swelling, with the outer surface of the chela gently convex ( Fig. 47 View FIGURE 47 I), although large ones have a prominent granular swelling. The G1 structures of specimens from Papua New Guinea, Australia, Vanuatu, and New Caledonia are almost identical, and very similar to that figured by Davie & Richer de Forges (2013: fig. 4A, B), being stocky in form; although it seems slightly more slender and elongated in the Papua New Guinea material ( Fig. 79 View FIGURE 79 K, L).

One small female (7.4 × 8.5, MNHN-IU-2013-9469) from New Caledonia is tentatively referred to T. potens   . Its carapace is relatively broader than T. potens   , with a shorter front and proportionately shorter ambulatory legs ( Fig. 17 View FIGURE 17 G), but this may be because of its relatively small size.

Larger males (e.g., 11.8 × 13.8 mm, MNHN-IU-2014-12814) have a prominent swelling on the submedian part of the outer surface of the major palm, closer to the fingers. Smaller males (e.g., 10.3 × 12.1 mm, ZRC 2015.241) have the same area gently convex but not discernible as a swelling, whereas the outer surface of the palm of younger males (e.g., 8.8 × 10.0 mm, ZRC 2015.242) is evenly convex.

Tenagopelta potens   is close to T. pacifica   n. sp., and the differences have been discussed under the latter species.

Distribution. Western Pacific Ocean ( Papua New Guinea to New Caledonia, including Queensland, Australia). Depth: 195– 970 m.

CSIRO

Australian National Fish Collection

ZRC

Zoological Reference Collection, National University of Singapore

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Chasmocarcinidae

Genus

Tenagopelta

Loc

Tenagopelta potens (Davie & Richer de Forges, 2013 )

Ng, Peter K. L. & Castro, Peter 2016
2016
Loc

Hephthopelta potens Davie & Richer de Forges, 2013 : 795

Forges 2013: 795
2013