Carcinoplax verdensis Rathbun 1914
- Dataset
- 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)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Decapoda
- family
- Goneplacidae
- genus
- Carcinoplax
- species
- Carcinoplax verdensis
description
(Figs 13 A-J; 14 A-H; 15 A-G; 24 A-H; 28 A-F)
description
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.
diagnosis
DIAGNOSIS. — Carapace (Figs 13 A, B; 14 A, B; 15 A, B) quadrate, slightly wider than long (1.4 × wider than long in holotype); slightly convex, slight transverse elevations, slight tomentum. Front (Figs 13 C, D; 14 C, D; 15 C) 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 13 D; 14 D), becoming more pronounced in pterygostomial crest, ridge; short granules on anterior, dorsal surface of carapace. Posterior margin of epistome (Figs 13 D; 14 D) straight, slight median emargination in some specimens, shallow notch on each lateral margin. Distal half of fingers dark brown in females (Figs 13 A, I, J; 15 A), two third in males (Fig. 14 A, H). “ Window ” not observed on outer surface of cheliped propodus. Inner (ventral), distal margin of cheliped carpus (Figs 13 F; 14 F; 15 E) with acute, conspicuous tooth. P 2 - P 5 (Figs 13 A; 14 A; 15 A; 28 A-F) slender in appearance. Male pleon proportionally wide (Fig. 14 G). G 1 (Fig. 24 A-C, E, G) slender; pointed tip with scattered spinules, abundant, almost reaching margin of tip in some individuals; G 2 (Fig. 24 D, F, H) slender, nearly equal or slightly longer than G 1, slightly curved flagellum, tip with two lateral spinules. COLOUR IN LIFE. — Orange carapace that intensifies with age, at least in females (Fig. 27 D-F). The legs (P 2 - P 5) of females show thin, red bands across the middle portion. Males are orange without any banding on the legs (Fig. 27 A-C).
discussion
REMARKS See Remarks for C. abyssicola. The relatively long, acute, and conspicuous tooth on the inner distal angle of the cheliped carpus (Figs 13 F; 14 F; 15 E) 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 (P 2 - P 5). 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. 28 E, F). 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 G 1 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.
distribution
TYPE LOCALITY. — Philippines, off Sombrero I., Verde I. Passage, 159 - 394 fathoms (= 291 - 721 m),
materials_examined
MATERIAL EXAMINED. — Taiwan • 1 ♂ (badly damaged); stn CP 19, 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. 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 • 1 ♀; MUSORSTOM 3, stn CP 116; 12 ° 32 ’ N, 120 ° 47 ’ E; 804 - 812 m depth; 3. VI. 1985; MNHN-IU- 2016 - 8001 • 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 • 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 • 1 ♂, 14.9 × 20.2 mm; PANGLAO 2005, stn CP 2332, Maribohoc Bay; 09 ° 38.8 ’ N, 123 ° 45.9 ’ E; 396 - 418 m depth; 22. V. 2005, ZRC 2019.0547, ex ZRC 2006.0214 (part) • 1 ♀, 5.8 × 8.1 mm; PANGLAO 2005, stn DW 2338, off Balicasag Island; 09 ° 30.7 ’ N, 123 ° 42.4 ‘ E; 347 - 349 m depth; 23. V. 2005; ZRC 2019.0548 • 1 ♂, 19.0 × 27.7 mm; PANGLAO 2005, stn CP 2339, off Balicasag Island; 09 ° 31.9 ’ N, 123 ° 43.7 ’ E, 164 - 176 m depth; 23. V. 2005; ZRC 2019.0550 • 1 ♀, 10.9 × 14.4 mm; same data as ZRC 2019.0550; ZRC 2019.0573 • 1 ♂, 3.8 × 4.8 mm; PANGLAO 2005, stn CP 2359, Bohol Sea; 08 ° 49.9 ’ N, 123 ° 34.9 ’ E; 437 - 476 m depth; 26. V. 2005, ZRC 2019.0553 • 1 ♂, 15.7 × 21.4 mm, ZRC 2019.0549 • 1 juvenile ♂; same data as ZRC 2019.0549; ZRC 2009.0990 • 2 ♀, 12.4 × 17.1 mm, 13.0 × 18.3 mm; PANGLAO 2005, stn CP 2361, Bohol Sea; 08 ° 53.1 ’ N, 123 ° 33.5 ’ E; 516 - 543 m depth; 26. V. 2005; ZRC 2019.0554 • 11 ♀ (1 with rhizocephalan), 4 ♂, 1 juvenile; PANGLAO 2005, stn CP 2384, off Aligbay Island; 08 ° 46.2 ’ N, 123 ° 16.1 ’ E; 624 - 647 m depth; 29. V. 2005; ZRC 2019.0546 • 1 ♂, 16.9 × 23.0 mm; PANGLAO 2005, stn CP 2385; 08 ° 51.0 ’ N, 123 ° 10.0 ’ E, 982 - 989 m depth; 29. V. 2005; ZRC 2009.1003 • 1 ♂, with sacculinid; PANGLAO 2005, stn CP 2386; 08 ° 49.3 ’ N, 123 ° 01.9 ’ E, 2120 - 2149 m depth (?); 29. V. 2005; ZRC 2019.0556 • 1 ♀, 10.9 × 14.6 mm; PANGLAO 2005, stn CP 2388, Maribohoc Bay; 09 ° 26.9 ’ N, 123 ° 34.5 ’ E; 762 - 786 m depth; 30. V. 2005, ZRC 2019.0551 • 2 ♂, 11.6 × 15.4 mm, 11.0 × 14.6 mm; same data as ZRC 2019.0551; ZRC 2019.0571 • 2 ♂, larger one 19.2 × 27.7 mm, 2 ♀; PANGLAO 2005, stn CP 2389, Bohol Sea; 09 ° 27.9 ’ N, 123 ° 38.4 ’ E; 784 - 786 m depth; 30. V. 2005; ZRC 2019.0555 • 2 ♂, 9.6 × 12.0, 12.8 × 17.1 mm; PANGLAO 2005, stn CP 2394, off Balicasag Island; 09 ° 28.6 ’ N, 123 ° 40.0 ’ E; 470 - 566 m depth; 30. V. 2005: ZRC 2019.0557 • 1 ♂, 10.0 × 13.4 mm; same data as ZRC 2019.0557; ZRC 2019.0574 • 3 ♂, 8.7 × 10.1 mm, 9.8 × 11.8 mm, 17.6 × 13.7 mm; PANGLAO 2005. stn CP 2396, west Panglao, on sandy bottom; 09 ° 36.3 ’ N 123 ° 42.0 ’ E; 673 - 715 m depth; 31. V. 2005; ZRC 2016.0446 • 2 ♂, 1 ♂, 13.2 × 16.1 mm with sacculinid; PANGLAO 2005, stn CP 2405, on sandy-muddy bottom; 09 ° 39.0 ’ N 123 ° 46.1 ’ E, 1. VI. 2005; ZRC 2006.0199 • 1 ♂, 1 ♀, (both with bopyrids); PANGLAO 2005, stn CP 2358, Bohol Sea; 08 ° 52.1 ’ N, 123 ° 37.1 ’ E; 569 - 583 m depth; 26. V. 2005; ZRC 2016.0439 • 1 ♂ (with bopyrid); PANGLAO 2005, stn CP 2396, Maribojoc Bay, 09 ° 36.3 ’ N, 123 ° 42.0 ’ E; 609 - 673 m depth; 31. V. 2005; ZRC 2016.0447 • 1 ♂, (with bopyrid); PANGLAO 2005, stn CP 2405, Maribojoc Bay; 09 ° 39.0 ’ N, 123 ° 46.1 ’ E; 387 - 453 m depth; 1. VI. 2005; ZRC 2016.0436 • 1 ♀ (with bopyrid), station unknown; Bohol Sea; V-VI 2005; ZRC 2016.0441 • 1 ♀, 12.8 × 17.9 mm; AURORA 2007, stn CP 2673, Luzon Sea; 14 ° 59.83 ’ N, 121 ° 43.90 ’ E - 15 ° 01.44 ’ N, 121 ° 44.75 ’ E; 431 - 493 m; 22. V. 2007; ZRC 2019.0559 • 1 ♀, 7.9 × 10.9 mm; AURORA 2007, stn DW 2692, 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. South China Sea • 1 ♀, ovigerous 9.4 × 13.0 mm; NANHAI 2014, stn CP 4117, LL 4; 20 ° 00.8788 ’ N, 114 ° 08.7974 ’ E; 333 - 421 m depth; 11. I. 2014, ZRC 2019.0561 • 1 ♀, 1 ♂; same data as stn CP 4117; ZRC 2019.0210 • 1 ♀; ZHONGSHA 2015, stn CP 4155, northeast of Macclesfield Bank; 16 ° 13.60 ’ N, 115 ° 01.61 ’ E; 510 - 526 m depth; 28. VII. 2015; ZRC 2019.0562 • 1 ♂, 11.1 × 16.0 mm; ZHONGSHA 2015, stn CP 4165, south of Taiwan Bank; 22 ° 09.888 ’ N, 118 ° 42.023 ’ E; 443 - 618 m depth; 1. VIII. 2015; ZRC 2019.0563 • 1 ♀; ZHONGSHA 2015, stn CP 4166, south of Taiwan Bank; 22 ° 07.6245 ’ N, 118 ° 43.3003 ’ E; 587 - 756 m depth; 1. VIII. 2015; ZRC 2019.0564 • 1 ♀, 6.8 × 8.8 mm; ORI 3 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.
materials_examined
TYPE MATERIAL. — Holotype. Philippines • Ovigerous ♀, 10.5 × 13.0 mm; Albatross; stn 5119; USNM 46167.
Name
- Homonyms
- Carcinoplax verdensis Rathbun 1914