Carcinoplax specularis 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: 256-260

publication ID

http://doi.org/ 10.5252/zoosystema2020v42a17

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:52C73176-6867-4415-A6FA-BAD328E9781D

DOI

http://doi.org/10.5281/zenodo.4525499

persistent identifier

http://treatment.plazi.org/id/038B3E2C-FF8D-FF91-A5D6-6D27FA0FB327

treatment provided by

Felipe

scientific name

Carcinoplax specularis Rathbun, 1914
status

 

Carcinoplax specularis Rathbun, 1914  

( Figs 10 View FIG A-H; 11 View FIG A-I; 12 View FIG A-I; 25 View FIG A-E; 27 View FIG D)

Carcinoplax specularis Rathbun, 1914: 143   [ Philippines].

Carcinoplax specularis   – Serène 1968: 90 [in list]. — Sakai 1969: 270, fig. 15c [holotype]. — Takeda & Yaganisawa 1985: 61 [in list] [ Japan]. — Guinot 1989: 296, figs 25, 34; pl. 8, figs A-D [holotype] [ Philippines]. — Ho et al. 2004: 659, fig. 6F (colour) [ Taiwan]. — Ng et al. 2008: 80 [in list].

? Carcinoplax specularis   – Serène & Vadon 1981: 119, 120, 123, 126 [ Philippines].

Carcinoplax specularis   [part] – Castro 2007: 640 View Cited Treatment [ Taiwan, Philippines].

Carcinoplax longipes   – Sakai 1976: 524 [in key], 527, fig. 281 [ Japan] (not C. longipes (Wood-Mason, 1891))   .

? Carcinoplax longipes   – Miyake 1991: 220 [in list] [ Japan]. — Takeda et al. 2006: 204 [in list] [ Japan]. — Takeda & Yaganisawa 1985: 61 [in list] [ Japan] (not C. longipes (Wood-Mason, 1891)   , either C. specularis   s. str. or C. verdensis Rathbun, 1914   ).

Not Carcinoplax specularis   [part] – Castro 2007: 640 View Cited Treatment (= C. polita Guinot, 1989   ).

Not Carcinoplax specularis   [part] – Castro 2007: 640 View Cited Treatment . (= C. tuberosa Castro, 2007   ).

Not Carcinoplax specularis   [part] – Castro 2007: 640 View Cited Treatment (= C. verdensis Rathbun, 1914   ).

Not Carcinoplax specularis   [part] – Castro 2007: 641 View Cited Treatment (? = C. fasciata Ng & Kumar, 2016   )

TYPE MATERIAL. — Holotype. Philippines. ♂, 16.7 × 23.0 mm, Albatross ; stn 5113; 17.I.1908; USNM 46164 View Materials .  

TYPE LOCALITY. — Philippines, off southern Luzon, Sombrero I., S. 7°W., 9.5 miles, 13°51’30”N, 120°50’30”E, 159 fathoms (= 291 m).

MATERIAL EXAMINED. — Taiwan • 1 ♂, 14.2 × 19.9 mm; TAIWAN 2001; stn CP77, 24°54.2’N, 122°02.5’E; 220-360 m depth; 7.V.2001; MNHN-IU-2016-122 (= MNHN-B29821) GoogleMaps   1 ♂, 16.5 × 22.5 mm; same data as MNHN-IU-2016-122; MNHN-IU-2016-123 (= MNHN-B29822) GoogleMaps   ; • 1♂, 18.4 × 25.8 mm, 1 ♀, 13.2 × 17.8 mm; TAIWAN 2001; stn CP85; 24°0.65’N, 122°0.64’E; 255-390 m depth; 9.V.2001; ZRC 2001.0134 View Materials GoogleMaps   1 ♀, ovigerous 1 ♂; TAIWAN 2001; stn CP96; 24°04.2’N, 122°04.2’E; 472-586 m depth; 18.V.2001; MNHN-IU-2016-124 (= MNHN-B29823) GoogleMaps   1 ♀, 12.4 × 16.7 mm; TAIWAN 2001; stn CP104; 24°48.9’N, 122°05.3’E; 365-447 m depth; 10.V.2001; MNHN-IU-2016-125 (= MNHN-B29824) GoogleMaps   .

Philippines • 1 ♂, 12.5 × 17.9 mm; PANGLAO 2005; stn CP2359, Bohol Sea ; 08°49.9’N, 123°34.9’E; 437-476 m depth; 26.V.2005; ZRC 2018.1435 View Materials GoogleMaps   2 ♀; PANGLAO 2005; stn CP2372, Dipolog Bay, Bohol Sea ; 8°38.7’N, 123°16.0’E; 27.V.2005; ZRC 2018.1436 View Materials GoogleMaps   1 ♀, 13.9 × 18.0 mm; PANGLAO 2005; stn CP2407, Maribohoc Bay ; 09°41.3’N, 123°48.5’E, 256-268 m depth; ZRC 2006.0207 View Materials GoogleMaps   2 ♂; AURORA; stn CP2731, Luzon Sea ; 15°22.44’N, 121°33.58’E - 15°24.48’N, 121°33.51’E; 376-391m; 31.V.2007; ZRC 2018.1437 View Materials GoogleMaps   4 ♀, largest 10.5 × 15.7 mm, 2 ♂, larger one 1.0 × 15.0 mm; AURORA; stn CP2734, Luzon Sea ; 15°56.41’N, 121°48.71’E - 15°56.98’N, 121°49.21’E; 453-460 m depth; 1.VI.2007; ZRC 2018.1438 View Materials GoogleMaps   .

DIAGNOSIS. — Carapace ( Figs 10A, B View FIG ; 11A, B View FIG ; 12A, B View FIG ) quadrate, slightly wider than long (1.4 × wider than long in holotype); slightly convex, marked by slight transverse elevations. Front ( Figs 10C, D View FIG ; 11C, D View FIG ; 12C, D View FIG ) straight, notch between front, inner edge of supraorbital border absent. Triangular or rounded tooth on outer orbital angle; two slender, acute or obtuse anterolateral teeth on each side of carapace. Small, short granules on subhepatic, pterygostomial regions ( Figs 10D View FIG ; 11D View FIG ; 12D View FIG ), becoming slightly more pronounced in pterygostomial crest, ridge. Posterior margin of epistome ( Figs 10D View FIG ; 11D View FIG ; 12D View FIG ) straight, slightly pointed medially, slight gap or notch on each lateral margin. Distal half of fingers dark brown in females ( Fig. 12A, F, I View FIG ), two-thirds in males ( Fig. 11A, I View FIG ). Smooth, oblong “window” on inner, dorsal surface of cheliped propodi of some males, including holotype ( Figs 10F View FIG ; 11G View FIG ). Inner (ventral), distal margin of cheliped carpus ( Figs 10F View FIG ; 11F, G View FIG ; 12F View FIG ) with short, blunt or acutetipped tooth. P2-P5 ( Figs 10A View FIG ; 11A View FIG ; 12A View FIG ; 27D View FIG ) moderately stout in appearance. Male pleon ( Figs 10G View FIG ; 11F View FIG ) proportionally narrow. G1 ( Fig. 25 View FIG A-D; Guinot 1989: fig. 34A) slender; truncated tip with scattered spinules that do not reach distal margin; G2 ( Fig. 25E View FIG ; Guinot 1989: fig. 34B) slender, nearly equal or slightly longer than G1, slightly curved flagellum, tip with two lateral spinules.

COLOUR IN LIFE. — Light orange with a semi-circular row of small white spots on each side of the carapace ( Fig. 27D View FIG ; Ho et al. 2004: fig. 6F).

GEOGRAPHICAL DISTRIBUTION. — Japan, Taiwan, and Philippines.

DEPTH. — Present in samples collected at depths of 220- 586 m.

REMARKS

Larger males show a “window”, an oblong, slightly darker spot on the inner, dorsal surface of the cheliped propodi ( Figs 10F View FIG ; 11G View FIG ), that was previously noted in the holotype by Rathbun (1914) and Guinot (1989). It has not been observed in females. Such a “window” was also observed by us in C. abyssicola   and C. adelphia   n. sp. For differences with C. adelphia   n. sp., see the remarks for the latter species.

Carcinoplax specularis   was found together with C. verdensis   and C. jugum   n. sp. from one station in the Philippines (CP2359).

Three specimens of C. tuberosa Castro, 2007   from Kai Is, Indonesia (MNHN-IU- 2016-98 (= MNHN-B 29385), MNHN-IU-2016-101 (= MNHN-B 29390), and MNHN- IU-2016-102 (= MNHN-B 29392)) were erroneously identified as C. specularis   by Castro (2007).

Two ovigerous females from the Maldives (John Murray Expedition, stn 143, 05°15.8’N, 73°22.8’E - 05°13.7’N, 73°23.6’E, 797 m depth; 30.III.1934, MNH 2007.64-65) identified as C. specularis   by Castro (2007: 641) most probably belong to a different species of Carcinoplax   , with Ng & Kumar (2016) suggesting it was likely to be C. fasciata Ng & Kumar, 2016   instead. The specimens in the NHM could not be located for re-examination (see Ng & Kumar 2016: 199).

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Goneplacidae

Genus

Carcinoplax

Loc

Carcinoplax specularis Rathbun, 1914

Ng, Peter K. L. & Castro, Peter 2020
2020
Loc

Carcinoplax specularis

CASTRO P. 2007: 640
2007
Loc

Carcinoplax specularis

CASTRO P. 2007: 640
2007
Loc

Carcinoplax specularis

CASTRO P. 2007: 640
2007
Loc

Carcinoplax specularis

CASTRO P. 2007: 640
2007
Loc

Carcinoplax specularis

CASTRO P. 2007: 641
2007
Loc

TAKEDA M. & KOMAI T. & KOMATSU H. & IKEDA H. 2006: 204
MIYAKE S. 1991: 220
TAKEDA M. & YAGANISAWA F. 1985: 61
1991
Loc

Carcinoplax specularis

SERENE R. & VADON C. 1981: 119
1981
Loc

SAKAI T. 1976: 524
1976
Loc

Carcinoplax specularis

NG P. K. L. & GUINOT D. & DAVIE P. J. F. 2008: 80
HO P. - H. & NG P. K. L. & CHAN T. Y. & LEE D. - A. 2004: 659
GUINOT D. 1989: 296
TAKEDA M. & YAGANISAWA F. 1985: 61
SAKAI T. 1969: 270
SERENE R. 1968: 90
1968
Loc

Carcinoplax specularis

RATHBUN M. J. 1914: 143
1914