Carcinoplax verdensis Rathbun, 1914

Ng, Peter K. L. & Castro, Peter, 2020, A revision of Carcinoplax abyssicola (Miers, 1885) and seven related species of Carcinoplax H. Milne Edwards, 1852, with the description of two new species and an updated key to the genus (Crustacea, Decapoda, Brachyura, Goneplacidae), Zoosystema 42 (17), pp. 239-284 : 260-264

publication ID	https://doi.org/ 10.5252/zoosystema2020v42a17
publication LSID	urn:lsid:zoobank.org:pub:52C73176-6867-4415-A6FA-BAD328E9781D
DOI	https://doi.org/10.5281/zenodo.4525503
persistent identifier	https://treatment.plazi.org/id/038B3E2C-FF89-FF9D-A5E9-6EC0FBB0B185
treatment provided by	Felipe
scientific name	Carcinoplax verdensis Rathbun, 1914
status

Treatment

Carcinoplax verdensis Rathbun, 1914 View in CoL

( Figs 13 View FIG A-J; 14 View FIG A-H; 15 View FIG A-G; 24 View FIG A-H; 28 View FIG A-F)

Carcinoplax verdensis Rathbun, 1914: 143 View in CoL [type locality: southern Luzon, Philippines]. — Tesch 1918: 154 [in list]. — Estampador 1937: 533 [in list]; 1959: 89 [in list] [ Philippines]. — Serène 1968: 90 [in list]. — Sakai 1969: 269 [in list], fig. 15d [holotype]. — Serène & Lohavanijaya 1973: 62 [in list], 65 [in key]. — Serène & Vadon 1981: 119, 123, 126 [ Philippines]. — Guinot 1989: 300, fig. 22; pl. 9, figs D-F [holotype] [ Philippines]. — Ng et al. 2008: 80 [in list].

Carcinoplax longipes View in CoL – Chen 1984: 189 [in key], 195, 197, fig. 6 [East China Sea]. — Ikeda 1998: 15, 42, 135, pl. 55 [ Japan] (not C. longipes (Wood-Mason, 1891)) View in CoL .

Carcinoplax aff. longipes View in CoL – Guinot 1989: 305, figs 27, 35, 36; pl. 10, figs D-G [ Philippines].

Carcinoplax specularis View in CoL [part] – Castro 2007: 640 View Cited Treatment [ Philippines].

Not Carcinoplax verdensis View in CoL – Selvaraj & Kathirvel 1980: 159, figs 1, 2 [ India] ( C. indica Doflein, 1904 View in CoL ).

TYPE MATERIAL. — Holotype. Philippines • Ovigerous ♀, 10.5 × 13.0 mm; Albatross; stn 5119; USNM 46167 View Materials .

TYPE LOCALITY. — Philippines, off Sombrero I., Verde I. Passage, 159-394 fathoms (= 291-721 m),

MATERIAL EXAMINED. — Taiwan • 1♂ (badly damaged); stn CP19, southwestern Taiwan ; 22°24.2’N 120°10.2’E - 22°23.8’N 120°09’E; 467-634 m depth; coll. T.-Y. Chan; 29.VII.2000; ZRC 2001.2216 View Materials . Philippines. 1 ovigerous ♀, holotype 10.5 × 13.0 mm; Albatross, stn 5119, off Sombrero I., Verde I. Passage; 291-721 m depth; 21.I.1908; USNM 46167 View Materials GoogleMaps • 1 ♀; MUSORSTOM 3, stn CP116; 12°32’N, 120°47’E; 804-812 m depth; 3.VI.1985; MNHN-IU-2016-8001 GoogleMaps • 2 ♀, 9.2 × 12.1 mm, 12.0 × 16.7 mm, 8 ♂ (2 with bopyrids); MUSORSTOM 3, Bohol , Balicasag I., off Panglao I., tangle nets of local fishermen; 09°31’00.2”N, 123°40’50.5”E; 200-300 m depth; XII.2000; ZRC 2001.0395 View Materials GoogleMaps • 1 ♀; MUSORSTOM 3, tangle nets of local fishermen; 09°31’00.2”N, 123°40’50.5”E; 200- 300 m depth; XII.2000; ZRC 2019.0544 View Materials GoogleMaps • 1 ♂, 14.9 × 20.2 mm; PANGLAO 2005, stn CP2332, Maribohoc Bay ; 09°38.8’N, 123°45.9’E; 396-418 m depth; 22.V.2005, ZRC 2019.0547 View Materials , ex ZRC 2006.0214 View Materials (part) GoogleMaps • 1 ♀, 5.8 × 8.1 mm; PANGLAO 2005, stn DW2338, off Balicasag Island ; 09°30.7’N, 123°42.4 ‘E; 347-349 m depth; 23.V.2005; ZRC 2019.0548 View Materials GoogleMaps • 1 ♂, 19.0 × 27.7 mm; PANGLAO 2005, stn CP2339, off Balicasag Island ; 09°31.9’N, 123°43.7’E, 164-176 m depth; 23.V.2005; ZRC 2019.0550 View Materials GoogleMaps • 1 ♀, 10.9 × 14.4 mm; same data as ZRC 2019.0550; ZRC 2019.0573 View Materials GoogleMaps • 1 ♂, 3.8 × 4.8 mm; PANGLAO 2005, stn CP2359, Bohol Sea ; 08°49.9’N, 123°34.9’E; 437-476 m depth; 26.V.2005, ZRC 2019.0553 View Materials GoogleMaps • 1 ♂, 15.7 × 21.4 mm, ZRC 2019.0549 View Materials • 1 juvenile ♂; same data as ZRC 2019.0549; ZRC 2009.0990 View Materials • 2 ♀, 12.4 × 17.1 mm, 13.0 × 18.3 mm; PANGLAO 2005, stn CP2361, Bohol Sea ; 08°53.1’N, 123°33.5’E; 516-543 m depth; 26.V.2005; ZRC 2019.0554 View Materials GoogleMaps • 11 ♀ (1 with rhizocephalan), 4 ♂, 1 juvenile; PANGLAO 2005, stn CP2384, off Aligbay Island ; 08°46.2’N, 123°16.1’E; 624-647 m depth; 29.V.2005; ZRC 2019.0546 View Materials GoogleMaps • 1 ♂, 16.9 × 23.0 mm; PANGLAO 2005, stn CP2385; 08°51.0’N, 123°10.0’E, 982-989 m depth; 29.V.2005; ZRC 2009.1003 View Materials GoogleMaps • 1 ♂, with sacculinid; PANGLAO 2005, stn CP2386; 08°49.3’N, 123°01.9’E, 2120-2149 m depth (?); 29.V.2005; ZRC 2019.0556 View Materials GoogleMaps • 1 ♀, 10.9 × 14.6 mm; PANGLAO 2005, stn CP2388, Maribohoc Bay ; 09°26.9’N, 123°34.5’E; 762-786 m depth; 30.V.2005, ZRC 2019.0551 View Materials GoogleMaps • 2 ♂, 11.6 × 15.4 mm, 11.0 × 14.6 mm; same data as ZRC 2019.0551; ZRC 2019.0571 View Materials GoogleMaps • 2 ♂, larger one 19.2 × 27.7 mm, 2 ♀; PANGLAO 2005, stn CP2389, Bohol Sea ; 09°27.9’N, 123°38.4’E; 784- 786 m depth; 30.V.2005; ZRC 2019.0555 View Materials GoogleMaps • 2 ♂, 9.6 × 12.0, 12.8 × 17.1 mm; PANGLAO 2005, stn CP2394, off Balicasag Island ; 09°28.6’N, 123°40.0’E; 470-566 m depth; 30.V.2005: ZRC 2019.0557 View Materials GoogleMaps • 1 ♂, 10.0 × 13.4 mm; same data as ZRC 2019.0557; ZRC 2019.0574 View Materials GoogleMaps • 3 ♂, 8.7 × 10.1 mm, 9.8 × 11.8 mm, 17.6 × 13.7 mm; PANGLAO 2005. stn CP2396, west Panglao , on sandy bottom; 09°36.3’N 123°42.0’E; 673- 715 m depth; 31.V.2005; ZRC 2016.0446 View Materials GoogleMaps • 2 ♂, 1 ♂, 13.2 × 16.1 mm with sacculinid; PANGLAO 2005, stn CP2405, on sandy-muddy bottom; 09°39.0’N 123°46.1’E, 1.VI.2005; ZRC 2006.0199 View Materials GoogleMaps • 1 ♂, 1♀, (both with bopyrids); PANGLAO 2005, stn CP2358, Bohol Sea ; 08°52.1’N, 123°37.1’E; 569-583 m depth; 26.V.2005; ZRC 2016.0439 View Materials GoogleMaps • 1 ♂ (with bopyrid); PANGLAO 2005, stn CP2396, Maribojoc Bay , 09°36.3’N, 123°42.0’E; 609- 673 m depth; 31.V.2005; ZRC 2016.0447 View Materials GoogleMaps • 1 ♂, (with bopyrid); PANGLAO 2005, stn CP2405, Maribojoc Bay ; 09°39.0’N, 123°46.1’E; 387-453 m depth; 1.VI.2005; ZRC 2016.0436 View Materials GoogleMaps • 1 ♀ (with bopyrid), station unknown; Bohol Sea ; V-VI 2005; ZRC 2016.0441 View Materials • 1 ♀, 12.8 × 17.9 mm; AURORA 2007, stn CP2673, Luzon Sea ; 14°59.83’N, 121°43.90’E - 15°01.44’N, 121°44.75’E; 431-493m; 22.V.2007; ZRC 2019.0559 View Materials GoogleMaps • 1 ♀, 7.9 × 10.9 mm; AURORA 2007, stn DW2692, Luzon Sea ; 14°40.15’N, 123°40.06’E - 14°40.45’N, 123°40.59’E; 261- 272 m depth; 26.V.2007; ZRC 2019.0560 View Materials GoogleMaps .

South China Sea • 1 ♀, ovigerous 9.4 × 13.0 mm; NANHAI 2014, stn CP4117, LL4; 20°00.8788’N, 114°08.7974’E; 333- 421 m depth; 11.I.2014, ZRC 2019.0561 View Materials GoogleMaps • 1 ♀, 1 ♂; same data as stn CP4117; ZRC 2019.0210 View Materials GoogleMaps • 1 ♀; ZHONGSHA 2015, stn CP4155, northeast of Macclesfield Bank ; 16°13.60’N, 115°01.61’E; 510-526 m depth; 28.VII.2015; ZRC 2019.0562 View Materials GoogleMaps • 1 ♂, 11.1 × 16.0 mm; ZHONGSHA 2015, stn CP4165, south of Taiwan Bank ; 22°09.888’N, 118°42.023’E; 443-618 m depth; 1.VIII.2015; ZRC 2019.0563 View Materials GoogleMaps • 1 ♀; ZHONGSHA 2015, stn CP4166, south of Taiwan Bank ; 22°07.6245’N, 118°43.3003’E; 587-756 m depth; 1.VIII.2015; ZRC 2019.0564 View Materials GoogleMaps • 1 ♀, 6.8 × 8.8 mm; ORI3 CRUISE, stn 9, Tungsha Is , 21°40.293’N 117°43.244’E - 21°38.995’N 117°41.649’E; 523- 510 m depth; coll. I.-S. Chen; 9.VII.2011; ZRC 2019.0374 View Materials GoogleMaps .

DIAGNOSIS. — Carapace ( Figs 13A, B View FIG ; 14A, B View FIG ; 15A, B View FIG ) quadrate, slightly wider than long (1.4 × wider than long in holotype); slightly convex, slight transverse elevations, slight tomentum. Front ( Figs 13C, D View FIG ; 14C, D View FIG ; 15C View FIG ) straight, notch on each lateral margin absent or slight if present. Rounded, short tooth on outer orbital angle; two slender, acute-tipped anterolateral teeth on each side of carapace. Small, short granules on subhepatic, pterygostomial regions ( Figs 13D View FIG ; 14D View FIG ), becoming more pronounced in pterygostomial crest, ridge; short granules on anterior, dorsal surface of carapace. Posterior margin of epistome ( Figs 13D View FIG ; 14D View FIG ) straight, slight median emargination in some specimens, shallow notch on each lateral margin. Distal half of fingers dark brown in females ( Figs 13A, I, J View FIG ; 15A View FIG ), two third in males ( Fig. 14A, H View FIG ). “Window” not observed on outer surface of cheliped propodus. Inner (ventral), distal margin of cheliped carpus ( Figs 13F View FIG ; 14F View FIG ; 15E View FIG ) with acute, conspicuous tooth. P2-P5 ( Figs 13A View FIG ; 14A View FIG ; 15A View FIG ; 28 View FIG A-F) slender in appearance. Male pleon proportionally wide ( Fig. 14G View FIG ). G1 ( Fig. 24 View FIG A-C, E, G) slender; pointed tip with scattered spinules, abundant, almost reaching margin of tip in some individuals; G2 ( Fig. 24D, F, H View FIG ) slender, nearly equal or slightly longer than G1, slightly curved flagellum, tip with two lateral spinules.

COLOUR IN LIFE. — Orange carapace that intensifies with age, at least in females ( Fig. 27 View FIG D-F). The legs (P2-P5) of females show thin, red bands across the middle portion. Males are orange without any banding on the legs ( Fig. 27 View FIG A-C).

GEOGRAPHICAL DISTRIBUTION. — Japan, East China Sea, Taiwan, Philippines, and South China Sea.

DEPTH. — Present in samples collected at depths of 164-989 m; 2120-2149 m in one station, possibly an error.

REMARKS

See Remarks for C. abyssicola .

The relatively long, acute, and conspicuous tooth on the inner distal angle of the cheliped carpus ( Figs 13F View FIG ; 14F View FIG ; 15E View FIG ) is a good character to distinguish C. verdensis , with most specimens showing this character. No other species treated here has this character. Some specimens (e.g. 1 ♀, 12.8 × 17.9 mm, ZRC 2019.0559) have lower, more obtuse cheliped carpal spines, not acute and elongated as is typical specimens.

Guinot (1989), who only observed the holotype, separated C. verdensis because of the absence of the “window” of C. specularis , the acute anterolateral teeth, and relatively more slender legs (P2-P5). The ambulatory meri of C. verdensis are indeed one of the longest in the group (see remarks for C. abyssicola ), although in a few specimens, the legs are somewhat shorter (e.g. Fig. 28E, F View FIG ).

A very large (54.0 × 69.0 mm) male specimen from southwestern India identified as C. verdensis by Selvaraj & Kathirvel (1980: 159, figs 1, 2) is clearly not this species as presently defined. Carcinoplax verdensis does not grow to such a large size, and the general carapace facies and G1 structure also do not match. The photograph of the overall habitus is too poor to see distinguishing characters and it probably belongs to C. indica Doflein, 1904 instead. This species was described from the Andamans and is known to grow to very large sizes. The size of the Indian specimen also argues against it being C. longipes , C. fasciata Ng & Kumar, 2016 , or C. mistio Ng & Mitra, 2019 .

Kingdom	Animalia
Phylum	Arthropoda
Class	Malacostraca
Order	Decapoda
Family	Goneplacidae
Genus	Carcinoplax