Camatopsis leptomerus, Ng, Peter K. L. & Castro, Peter, 2016

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182: 39-42

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.5617097

persistent identifier

http://treatment.plazi.org/id/F16BFB33-FF85-FFD2-FF6A-FAB1FA49FBEE

treatment provided by

Plazi

scientific name

Camatopsis leptomerus
status

n. sp.

Camatopsis leptomerus   n. sp.

( Figs. 8 View FIGURE 8 A‒F; 23D, E; 30C; 39A‒D; 51C; 58C; 67J‒L; 68; 86C; 90C; 100E‒G)

Camatopsis rubida Forma   B—Tesch 1918: 235 (part), pl. 16, fig. 3e‒i [ Indonesia]. [Other Forma B specimens = Camatopsis minor   n. sp. and Microtopsis teschi   n. sp.].

? Camatopsis rubidus   [sic] Serène & Vadon 1981: 118, 119, 120, 123 [ Philippines].

Type material. Holotype male (10.5 × 11.3 mm) ( NMCR), Bohol Sea, Philippines, PANGLAO 2005, stn CP2390, 09°27'N, 123°43'E, 627–645 m, 30.05.2005. GoogleMaps  

Paratypes: 2 males (ZRC 2015.216), PANGLAO 2005: off Balicasag I., stn CP2336, 09°32.3’N, 123°39.3’E, 757–760 m, 22.05.2005; 1 ovigerous female ( ZRC 2015.123 View Materials ) [photographed], DW2371, Bohol / Sulu seas, Dipolog Bay , 08°35’N, 123°16'E, 172–175 m, 24.05.2005 GoogleMaps   ; 1 male (7.8 × 8.1 mm with sacculinids) (ZRC 2015.146), stn CP2655, 16°02.8’N–16°03.03’N to 121°53.7’E–121°52.51’E, 189 m, 20.05.2007; 1 female (ZRC 2015.154) [photographed], stn CP2655, 16°03’N, 121°54’E, 189 m, 20.05.2007; 1 female with sacculinid (ZRC 2015.150) [photographed], stn CP2657, 16°01’N, 121°53’E, 342–358 m, 20.05.2007; 2 males (ZRC 2015.183) [G1 drawn], stn 2762, 15°52.45’N–15°51.72’N to 121°37.22’E–121°51.72’E, 66 m, 04.06.2007; 1 male (ZRC 2015.148), stn CP2665, 15°53’N, 121°42’E, 123–125 m, 21.05.2007; 1 male, 4 females (MNHN-IU-2014-12797, ex ZRC 2015.171), stn CP2666, 15°57’N, 121°44’E, 198–199 m, 21.05.2007; 1 male (ZRC 2015.156), stn CP2667, 15° 56’N, 121°47’E, 292–307 m, 21.05.2007; 1 female (ZRC 2015.149), stn DW2676, 15°04’N, 121°41’E, 313–323 m, 22.05.2007; 1 female (ZRC 2015.157) [photographed], stn CP2708, 15°07’N, 121°38’E, 307–309 m, 28.05.2007; 3 females (1 ovigerous 4.0 × 4.7 mm) (ZRC 2015.155), stn CP2709, 15°11’N, 121°35’E, 244–296 m, 28.05.2007; 1 female (10.4 × 11.1 mm) (ZRC 2015.142), stn CP2711, 15°19’N, 121°32’E, 184–200 m, 28.05.2007; 1 female (12.7 × 13.2 mm) (ZRC 2015.170) [photographed], stn CP2715, 14°33’N, 121°42'E, 274– 249 m, 29.05.2007; 1 male, 1 female (ZRC 2015.147), stn CP2724, 15°11.66’N–15°13.75’N to 121°34.52’E– 121°33.56’E, 229–280 m, 31.05.2007; 1 ovigerous female (9.0 × 10.1 mm) (ZRC 2015.145), stn CP2727, 15°19’N, 121°34'E, 300–318 m, 31.05.2007; 1 female (3.4 × 4.0 mm) ( ZRC 2015.159 View Materials ), Eastern Luzon, Baler Bay , Casiguran Sound, stn DW2739, 16°05’N, 121°57’E, 96 m, 1.06.2007 GoogleMaps   ; 1 female (ZRC 2015.151), stn CP2742, 16°03’N, 121°52'E, 182–205 m, 01.06.2007; 1 male, 1 female (MNHN-IU-2014-12798, ex ZRC 2015.152), stn CC2743, 16°01’N–16°00.75’N to 121°51.06’E–121°49.94’E, 302–309 m, 02.06.2007; 4 females (8.1 × 8.5 mm, 8.7 × 9.4 mm, 9.0 × 9.8 mm, 9.3 × 10.2 mm) (ZRC 2015.160), stn CC2746, 15°58.78’N–15°56.63’N to 121°46.44'E–121°44.85’E, 182–220 m, 02.06.2007; 3 females (ZRC 2015.176), stn CP2748, 15°56’N, 121°46'E, 230–248 m, 02.06.2007; 1 male, 1 female (ZRC 2015.144), stn CP2761, 15°53.2’N, 121°53.2'E, 79 m, 04.06.2007; 1 female (ZRC 2015.153), stn CP2763, 15°51’N, 121°51'E, 30 m, 0 4.06.2007.

Other material examined. Philippines. RV Hakuho-maru: 4 females (CBM-ZC 8771), Sulu Sea, stn SA-2, 10°36.48’N, 121°31.56'E, 362–372 m, S. Ohtsuka coll., 08.12.2002 GoogleMaps   .— PANGLAO 2004: 1 female ( ZRC 2015.169 View Materials ), Cortes I., Bohol, stn D10, 09°42.4’N, 123°50.6’E, 15–22 m, 20.06.2004 GoogleMaps   ; 1 crushed specimen ( ZRC 2015.126 View Materials ) [photographed], Cortes I., Bohol, stn D10, 09°42.4’N, 123°50.6’E, 15–22 m, 20.06.2004 GoogleMaps   ; 1 male ZRC 2015.129 View Materials ) [photographed], Bohol I., Cortes , stn T15, 09°41.2’N, 123°49.0’E, 180 m, 24.06.2004 GoogleMaps   ; 1 female ( ZRC 2015.141 View Materials ), Bohol I., Cortes , stn T19, 09°42.2’N, 123°50.8’E, 10–26 m, 20.06.2004 GoogleMaps   ; 1 juvenile, 2 males (3.1 × 3.4 mm, 4.7 × 5.9 mm), 4 females (smallest 4.6 × 5.4 mm) ( ZRC 2015.120 View Materials ), Bohol I., Cortes , stn T25, 09°41.1’N, 123°49.3'E, 160–210 m, 24.06.2004 GoogleMaps   .—PANGLAO 2005: 2 males, 1 female ( ZRC 2015.135 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2332, 09°39’N, 123°46'E, 396–418 m, 22.05.2005 GoogleMaps   ; 2 males, 4 females ( ZRC 2015.127 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2333, 09°38’N, 123°44'E, 584–596 m, 22.05.2005 GoogleMaps   ; 1 male, 1 female ( ZRC 2015.137 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2334, 09°38’N, 123°40'E, 606–631 m, 22.05.2005 GoogleMaps   ; 1 female ( ZRC 2015.130 View Materials ), Bohol Sea, stn CP2335, 09°34’N, 123°38'E, 729–733 m, 22.05.2005 GoogleMaps   ; 1 male ( ZRC 2015.179 View Materials ), off Balicasag I., Bohol, stn CP2339, 09°31.9’N, 123°43.7’E, 164–176 m, 23.05.2005 GoogleMaps   ; 2 males, 1 female ( ZRC 2015.125 View Materials ), Bohol Sea, off Balicasag I., stn CP2340, 09°29’N, 123°44'E, 271–318 m, 27.05.2005 GoogleMaps   ; 1 male, 1 juvenile female, 1 female ( ZRC 2015.121 View Materials ), Bohol Sea, off Pamilacan I., stn CP2343, 09°27’N, 123°49'E, 273–356 m, 23.05.2005 GoogleMaps   ; 2 females ( ZRC 2015.134 View Materials ), Bohol Sea, off Pamilacan I., stn CP2348, 09°30’N, 123°52'E, 196–216 m, 24.05.2005 GoogleMaps   ; 2 females ( ZRC 2015.140 View Materials ), Bohol Sea, off Pamilacan I., stn CP2349, 09°32’N, 123°56'E, 219–240 m, 24.05.2005 GoogleMaps   ; 2 females (larger 12.4 × 12.8 mm) ( ZRC 2015.131 View Materials ), Bohol Sea, stn CP2350, 09°31’N, 124°01'E, 602–738 m, 24.05.2005 GoogleMaps   ; 2 males ( ZRC 2015.162 View Materials ), Bohol Sea, stn CP2352, 09°27’N, 124°03'E, 923–1260 m, 24.05.2005 GoogleMaps   ; 1 male, 1 female, Bohol / Sulu seas, Dipolog Bay , stn DW2371, 08°35’N, 123°16'E, 172–175 m, 24.05.2005 GoogleMaps   ; 1 male, 1 female ( ZRC 2015.128 View Materials ), Bohol / Sulu seas, Dipolog Bay , stn CP2372, 08°39’N, 123°16'E, 255–301 m, 27.05.2005 GoogleMaps   ; 1 female ( ZRC 2015.124 View Materials ), Bohol / Sulu seas, Dipolog Bay , stn CP2379, 08°39’N, 123°16'E, 255–301 m, 28.05.2005 GoogleMaps   ; 2 males, 2 females ( ZRC 2015.132 View Materials ), Bohol / Sulu seas, Dipolog Bay , stn CP2381, 08°43’N, 123°19'E, 259–280 m, 28.05.2005 GoogleMaps   ; 1 male (6.0 × 6.8 mm), 1 female (6.6 × 7.7 mm) ( ZRC 2015.139 View Materials ), Bohol / Sulu seas, off Aligbay I., stn CP2383, 08°45’N, 123°18'E, 338–351 m, 29.05.2005 GoogleMaps   ; 4 males, 2 females (MNHN-IU-2014-12796, ex ZRC 2015.158 View Materials ), Bohol Sea, stn CP2388, 09°27’N, 123°34'E, 762–786 m, 30.05.2005 GoogleMaps   ; 1 male, 5 females ( ZRC 2015.163 View Materials ), Bohol Sea, stn CP2389, 09°28’N, 123°38'E, 784–786 m, 30.05.2005 GoogleMaps   ; 6 males, 10 females (smallest 8.7 × 10.1 mm) (ZRC 2015.133), stn CP2390, 09°27’N, 123°43'E, 627– 645 m, 30.05.2005; 2 females (ZRC 2015.182), stn CP2390, 09°27’N, 123°43'E, 627–645 m, 30.05.2005; 1 female ( ZRC 2015.177 View Materials ), Bohol Sea, off Balicasag I., stn CP2394, 09°29’N, 123°40'E, 470–566 m, 30.05.2005 GoogleMaps   ; 3 females ( ZRC 2015.136 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2396, 09°36’N, 123°42'E, 609–673 m, 31.05.2005 GoogleMaps   ; 1 male, 3 females ( ZRC 2015.167 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2397, 09°35’N, 123°42'E, 642–669 m, 31.05.2005 GoogleMaps   ; 1 male ( ZRC 2015.181 View Materials ), Bohol Sea, off Balicasag I., stn CP2398, 09°33’N, 123°40'E, 713–731 m, 31.05.2005 GoogleMaps   ; 1 female ( ZRC 2015.122 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2404, 09°39’N, 123°43'E, 481–505 m, 1.06.2005 GoogleMaps   ; 1 female ( ZRC 2015.138 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2405, 09°39’N, 123°46'E, 387–453 m, 1.06.2005 GoogleMaps   ; 1 male, 3 females ( ZRC 2015.143 View Materials ), Bohol Sea, Maribojoc Bay , stn CP2407, 09°41’N, 123°48'E, 256–268 m, 1.06.2005. GoogleMaps  

Taiwan. Nanhai 2014 Expedition: 1 male (7.4 × 8.0 mm) ( ZRC 2014.0226 View Materials ), stn CP4009, muddy bottom, off Small Liu Qiu I., 22°12.9942’N   –22°12.9631’N to 120°25.9553’E– 120°24.1897’E, 310–346 m, northernmost Taiwan, near Philippines, 1.12.2013.  

Malaysia. 1 female (4.4 × 4.6 mm) ( ZRC 2014.00222 View Materials ), stn F28, oilfield, offshore Bintulu, northern Sarawak, deep water, T.S. Leong coll., 2000s.  

Indonesia. Ambon. GoogleMaps   SIBOGA EXPEDITION   : 1 male (2.5 × 3.9 mm) (NNM-ZMA 241605e), near Rotti   GoogleMaps , stn 302, 10°27.9’S, 123°28.7’E, 216 m, 07.1899; 1 male (4.2 × 5.0 mm) (NNM-ZMA 241605c), stn 312, Saleh Bay , north coast of Sumbawa, 274 m, 0 7.1899.  

Papua New Guinea. BIOPAPUA: 1 female (MNHN-IU-2013-7162), Tami I., Huon Gulf, stn DW3644, 06°46’S, 147°50’E, 360-406 m, 24.08.2010 GoogleMaps   ; 1 male, 2 females (MNHN-IU-2011-1528), Open Bay , stn CP3665, 04°50’S, 151°38’E, 225–340 m, 23.10.2010 GoogleMaps   ; 1 female (MNHN-IU- 2011-2421), off Sepik River, stn CP3702, 03°57’S, 144°40’E, 80–91 m, 01.10.2010 GoogleMaps   ; 1 male, 4 females (1 crushed) ( ZRC 2015.263 View Materials , MNHN-IU- 2011-2176), Astrolabe Bay , stn CP3710, 05°22’S, 145°48’E, 372–384 m, 05.10.2010 GoogleMaps   ; 1 male, 1 female ( ZRC 2015.246 View Materials , ex MNHN-IU- 2011-2044), Astrolabe Bay , stn CP3711, 05°23’S, 145°48’E, 434–447 m, 05.10.2010 GoogleMaps   .— PAPUA NIUGINI: 1 male, 1 female (MNHN-IU-2013-9009), west Kranket I., stn CP3949, 05°12’S, 145°51’E, 380–407 m, 26.11.2012 GoogleMaps   .

Vanuatu. MUSORSTOM 8: 1 male (MNHN-IU-2013-9047), stn DW1003, 18°49’S, 168°59'E, 200–327 m, 25.09.1994 GoogleMaps   ; 1 male (MNHN-IU-2014-12799), stn DW1069, 15°33’S, 167°14'E, 122–125 m, 04.10.1994; 1 female (MNHN-IU-2014-12800), stn DW1115, 15°10’S, 166°53'E, 147–150 m, 09.10.1994.— SANTO 2006: 1 juvenile ( ZRC 2015.161 View Materials ), northwest of Malo I., stn AT6, 15°38.2’S, 167°02.2'E, 140–167 m, 15.09.2006 GoogleMaps   ; 1 female (7.2 × 7.9 mm) (ZRC 2015.173) [photographed], W. Malo I., stn AT18, 15°41’S, 167°03'E, 321–336 m, 21.09.2006; 1 female (ZRC 2015.178), W. Malo I., stn AT18, 15°41’S, 167°03'E, 321–336 m, 21.09.2006; 1 female (9.5 × 10.1 mm) (ZRC 2015.168) [photographed], N. Urélapa I., stn AT29, 15°35.9’S–15°36.0'S to 167°01.3/01.6'E, 83–90 m, 25.09.2006; 1 male (5.1 × 5.6 mm) (ZRC 2015.184), N. Urélapa I., stn AT29, 15°35.9'S–15°36.0’S to 167°01.3/ 01.6'E, 83–90 m, 25.09.2006; 1 female (ZRC 2015.172), N. Urélapa I, stn AT43, 15°36’S, 167°02'E, 84–105 m, 29.09.2006; 1 male, 1 female (MNHN-IU-2014-12801, ex ZRC 2015.174), N. Urélapa I., AT44, 15°36’S, 167°03'E, 86–118 m, 29.09.2006; 1 female (ZRC 2015.175), Bigbay, stn AT98, 15°07’S, 166°51'E, 347–394 m, 14.10.2006; 1 female (ZRC 2015.180), W. Malo I., stn AT121, 15°39’S, 167°01'E, 275–290 m, 19.10.2006.

New Caledonia. BATHUS 1: 1 female (MNHN-IU-2013-9461), stn DW664, 20°57.34’S, 165°36.70’E, 650– 700 m, 13.03.1993 GoogleMaps   ; 1 juvenile male, 1 female (MNHN-IU-2013-9458), stn DW706, 21°42.13’S, 166°34.21’E, 247–252 m, 19.03.1993.—BATHUS 4: 1 male, 2 females (MNHN-IU-2013-9465), stn DW882, 22°02.43’S, 165°56.42’E, 250–350 m, 01.08.1994.— EXBODI: 3 females (MNHN-IU-2011-8837), Thio , stn DW3794, 21°33’S, 166°22'E, 224–285 m, 04.09.2011 GoogleMaps   ; 5 males, 5 females (MNHN-IU-2011-7691), 1 male, 5 females (MNHN-IU-2011-8795), Thio , stn CP3795, 21°32’S, 166°21’E, 240–245 m, 04.09.2011 GoogleMaps   ; 1 male (MNHN-IU- 2011-6735), stn DW3797, 21°31’S, 166°19’E, 456 m, 04.09.2011; 1 male (MNHN-IU-2011-7282), Thio ,stn DW3798, 21°32’S, 166°21'E, 478–480 m, 04.09.2011 GoogleMaps   ; 1 female (MNHN-IU-2013-9006), 1 male (MNHN-IU- 2013-9008), Thio , stn CP3800, 21°32’S, 166°22'E, 279–282 m, 04.09.2011 GoogleMaps   ; 2 females (MNHN-IU-2011-7417), Toupeti , stn DW3804, 21°43’S, 166°35'E, 280 m, 05.09.2011 GoogleMaps   ; 3 males, 3 females (MNHN-IU-2011-6985), Solitaire Pass , stn DW3812, 21°46’S, 166°39’E, 235–240 m, 06.09.2011 GoogleMaps   ; 2 females (MNHN-IU-2011-8874), 2 females (MNHN-IU-2011-8266), 1 male, 1 female (MNHN-IU-2011-8110), 1 male, 3 females (MNHN-IU-2011- 7445), Solitaire Pass , stn CP3813, 21°46’S, 166°38'E, 251–281 m, 06.09.2011 GoogleMaps   ; 3 females (MNHN-IU-2011-7284), Kouakoue Canyon , stn DW3820, 21°53’S, 166°50’E, 250–337 m, 07.09.2011 GoogleMaps   ; 1 male, 2 females (MNHN-IU- 2011-7728), Kouakoué Canyon , stn CP3821, 21°53’S, 166°50’E, 211–440m, 07.09.2011 GoogleMaps   ; 4 males (MNHN-IU- 2011-8737), Pass at Ounia, stn CP3823, 21°55’S, 166°55’E, 246–255 m, 07.09.2011 GoogleMaps   ; 1 male, 6 females (MNHN- IU-2013-9004), Pass at Ounia, stn CP3827, 21°58’S, 166°57’E, 220–232 m, 08.09.2011 GoogleMaps   ; 5 males, 8 females (MNHN-IU-2011-8346), 10 males, 12 females (MNHN-IU-2011-6741), Pass at Ounia, stn CP3827, 21°58’S, 166°57’E, 220–232 m, 08.09.2011 GoogleMaps   ; 1 male (MNHN-IU-2011-7858), Pass at Ouénou, stn CP3828, 22°00’S, 167°01’E, 200–302 m, 0 8.09.2011. GoogleMaps  

Diagnosis. Carapace ( Figs. 8 View FIGURE 8 A‒F; 100E–G) subtrapezoidal, 1.0‒1.2 wider than long; front bilobed, with shallow to sometimes deep median cleft; anterolateral margins arcuate, minutely granular with granules higher along lateral margins, without distinct lobes or teeth. Eye peduncle ( Fig. 23 View FIGURE 23 D, E) filling orbit, short, slightly mobile; cornea reduced, with reduced pigmentation. Epistome ( Fig. 23 View FIGURE 23 D, E) with wide, semicircular median lobe with deep median fissure, semicircular lateral margins. Third maxilliped ( Fig. 30 View FIGURE 30 C) merus subcircular, ischium subquadrate, about same length as merus. Proportionally long, slender ambulatory legs ( Figs. 8 View FIGURE 8 A‒F; 100E); P5 merus 0.7 cl in holotype male, 0.6 in paratype female. Chelipeds ( Figs. 8 View FIGURE 8 A‒F; 39A‒D; 100E–G) subequal in length, slightly dissimilar in females, heteromorphic in males. Major chela of males ( Fig. 39 View FIGURE 39 A) with thick propodus, cutting margins with wide teeth. Minor   chela of both sexes ( Fig. 39 View FIGURE 39 B, D) with short teeth of about same size (2 long, sharp teeth that overlap dactylus when closed in holotype male). Inner margin of cheliped carpus smooth. Fused thoracic sternites 1, 2 ( Fig. 51 View FIGURE 51 C) triangular, proportionally narrow, short. Male pleon ( Figs. 51 View FIGURE 51 C; 58C) with proportionally short telson. G1 ( Figs. 67 View FIGURE 67 J, K; 68A‒D) stout, distal segment slightly curved, distal segment curved inwards, upwards, with short to long spinules. G2 ( Fig. 67 View FIGURE 67 L) about 3/4 G1 length, straight, slender, distal segment short, straight. Female pleon ( Fig. 86 View FIGURE 86 C) with lateral margins of somites strongly convex; telson proportionally short. Sterno-pleonal cavity of female ( Fig. 90 View FIGURE 90 C) moderately deep, vulvae far apart from each other.

Colour. The carapace is brownish white to light brown in life, with the chelipeds white and the ambulatory legs white to light brown ( Fig. 100 View FIGURE 100 E‒G).

Etymology. The species epithet, leptomerus   , refers to the relatively longer and more slender ambulatory legs of individuals as compared to congeners. The name is used as a noun in apposition.

Remarks. Camatopsis leptomerus   n. sp. is easily distinguished from congeners by having the proportionately longest and most slender ambulatory meri ( Fig. 8 View FIGURE 8 A‒F). Its G1 is also the straightest, with the distal part twisting gently but distinctly upwards rather than turned to one side (when examined ex situ) ( Figs. 67 View FIGURE 67 J, K; 68A‒D). The distal part of the G1 is distinctly bent inwards in congeners. This is evident even in small specimens (see remarks for genus and Camatopsis rubida   ). Variation in the morphologies of the third maxillipeds and chela are also discussed under the generic remarks.

Camatopsis leptomerus   n. sp. is one of the widest ranging species, occurring from Indonesia to New Caledonia and southern Taiwan. It apparently occurs sympatrically with species like C. rubida   in Papua New Guinea and Indonesia. In Indonesia, both species were collected from one Siboga   station (312) in Saleh Bay on the north coast of Sumbawa.

Serène & Vadon’s (1981: 118, 119, 120, 123) record of “ Camatopsis rubidus   ” [sic] from the Philippines requires confirmation but is provisionally referred to C. leptomerus   n. sp. given its occurrence in the area.

Distribution. Western Pacific (southern Taiwan to Malaysia, Indonesia, New Caledonia). Depth: 13– 660 m.

NMCR

New Mexico State University

ZRC

Zoological Reference Collection, National University of Singapore

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Chasmocarcinidae

Genus

Camatopsis

Loc

Camatopsis leptomerus

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

Camatopsis rubidus

Serene 1981: 118
1981