Carcinoplax longipes, , Ng & Kumar, 2016

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 : 251-256

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.4525491
persistent identifier	https://treatment.plazi.org/id/038B3E2C-FF90-FF95-A5B5-6FA1FB22B047
treatment provided by	Felipe
scientific name	Carcinoplax longipes
status

Treatment

Carcinoplax longipes View in CoL (Wood-Mason in Wood-Mason & Alcock, 1891)

( Figs 6 View FIG A-G; 7 View FIG A-I; 8 View FIG A-H; 9 View FIG A-H; 23 View FIG I-L; 27 View FIG A-C)

Nectopanope longipes Wood-Mason in Wood-Mason & Alcock, 1891: 262 [type locality: Andaman Sea].

Nectopanope longipes – Alcock & Anderson 1895: pl. 14, fig. 7 [Andaman Sea].

Carcinoplax longipes View in CoL – Alcock 1899: 71; 1900: 302 [in key], 303 [southern India, Andaman Sea]. — Alcock & Anderson 1899: 5 [in list]. — Doflein 1904: 117, 306 [Andaman Sea]. — Tesch 1918: 154 [in list]. — Serène 1968: 90 [in list]. — Sakai 1969: 270 [in list]. — Serène & Lohavanijaya 1973: 63, 765, 68, pl. 14, fig. D [Indian material]. — Guinot 1989: 303 [ India], fig. 26, pl. 10, figs A-C [Andaman Sea]. — Chen 1998: 266 [in key]. — Ng et al. 2008: 80 [in list]

Carcinoplax longipes View in CoL [part] – Castro 2007: 636 View Cited Treatment [ Laccadive Sea].

Pilumnoplax longipes – Miers 1886: 226 [in list].

Not Carcinoplax longipes View in CoL – Sakai 1976: 524 [in key], 527, fig. 281 [ Japan] (= C. specularis Rathbun, 1914 View in CoL ).

Not Carcinoplax longipes View in CoL – Miyake 1991: 220 [in list] [ Japan]. — Takeda et al. 2006: 204 [in list] [ Japan]. — Takeda & Yaganisawa 1985: 61 [in list] [ Japan] (? C. specularis Rathbun, 1914 View in CoL or C. verdensis Rathbun, 1914 View in CoL ).

Not 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] (= C. verdensis Rathbun, 1914 View in CoL ).

TYPE MATERIAL. — Syntypes. Andaman Sea. ♂ (8.5 × 11.7 mm), juvenile female from Investigator , stn 56, deposited at Zoological Survey of India, Kolkata .

TYPE LOCALITY. — Andaman Sea, 403- 439 m.

DIAGNOSIS. — Carapace ( Figs 6A, B View FIG ; 7A, B View FIG ; 8A, B View FIG ; 9A, B View FIG ) quadrate, slightly wider than long (1.3 × wider than long in two topotypes); slightly convex, smooth. Front ( Figs 6C View FIG ; 7C, D View FIG ; 8C, D View FIG ; 9C View FIG ) slightly sinuous, notch between front, inner edge of supraorbital border absent. Truncated or short triangular tooth on outer orbital angle; two slender, acute-tipped, curved anterolateral teeth on each side of carapace. Short granules on subhepatic, pterygostomial regions ( Fig. 7C, D View FIG ), becoming more pronounced in pterygostomial crest, ridge. Posterior margin of epistome ( Figs 6C View FIG ; 7C, D View FIG ; 8C, D View FIG ; 9C View FIG ) short, straight, deep u- or v-shaped notch on each lateral margin. Nearly all distal portion of fingers dark brown in males, about half in females ( Figs 8H View FIG ; 9H View FIG ; 27 View FIG A-C). “Window” not observed on outer surface of cheliped propodus. Inner (ventral), distal margin of cheliped carpus ( Figs 5E View FIG ; 6E View FIG ; 7F View FIG ; 8F View FIG ; 9E View FIG ) with triangular, acute tipped tooth. P2-P5 ( Figs 6A View FIG ; 7A View FIG ; 8A View FIG ; 9A View FIG ; 26 View FIG A-C) long, slender. Male pleon ( Figs 6F View FIG ; 8G View FIG ) proportionally wide. G1 ( Fig. 23I, J, K View FIG ) slender; pointed tip with scattered spinules; G2 ( Fig. 23L View FIG ) slender, slightly longer than G1, slightly curved flagellum, tip with two lateral spinules.

MATERIAL EXAMINED. — India • 1 ♀, 10.8 × 14.9 mm, 1♂, 8.6 × 11.0 mm; off Travancore coast; Investigator ; USNM 4691 .

Indonesia • 1 ovigerous ♀, 10.8 × 14.3 mm; SJADES; stn CP22, E. Sunda Strait, Java, 06°46.458’S, 105°07.068’E; 864-870 m depth; 27.III.2018; ZRC 2018.1420 View Materials GoogleMaps • 1 ♂, 8.3 × 9.9 mm; SJADES; stn CP23; E. Sunda Strait, Java; 06°46.739’S, 105°09.239’E; 559- 571 m depth; 27.III.2018; ZRC 2018.1421 View Materials GoogleMaps • 1 ♂, 9.0 × 12.4 mm; SJADES; stn CP33, E. Indian Ocean south of Java; 07°42.912’S, 107°36.559’E; 312-525 m depth; 29.III.2018; ZRC 2018.1422 View Materials GoogleMaps • 1 ovigerous ♀, cl 8.5 mm, carapace damaged, 1 ♂, 7.9 × 10.5 mm; SJADES; stn CP35, E. Indian Ocean; 07°47.677’S, 107°41.904’E; 603-686 m depth; 29.III.2018; ZRC 2018.1423 View Materials GoogleMaps • 4 ovigerous ♀, 6.2 × 8.0 mm to 7.7 × 9.5 mm, 12 ♂, 7.3 × 9.4 mm to 9.9 × 13.9 mm; SJADES; stn CP39, E. Indian Ocean; 08°15.885’S, 109°10.163’E; 528-637 m depth; 31.III.2018; ZRC 2018.1424 View Materials GoogleMaps • 1 juvenile ♀, 6.0 × 7.8 mm; SJADES; stn DW46, E. Indian Ocean; 07°47.716’S, 107°44.896’E; 540-654 m depth; 1.IV.2018 • 2 ovigerous ♀, 7.6 × 9.6 mm, 6.7 × 8.1 mm; SJADES; stn CP47, E. Indian Ocean; 07°47.972’S, 107°45.298’E; 476-530 m depth; 1.IV.2018; MZB GoogleMaps • 1 ♂, 7.9 × 9.9 mm; SJADES; stn CP48, E. Indian Ocean; 07°51.120’S, 107°46.245’E; 637-689 m depth; 1.IV.2018; MZB GoogleMaps • 2♀, 2 ovigerous ♀, 2 ♂, larger one 9.5 × 12.9 mm; stn CP51, E. Indian Ocean; 07°04.874’S, 106°25.396’E; 569-657 m depth; 2.IV.2018; ZRC 2018.1427 View Materials GoogleMaps • 1 ♀, 1 ovigerous ♀, 1 ♂, 10.8 × 14.4 mm; same data as ZRC 2018.1427; MZB GoogleMaps .

COLOUR IN LIFE. — Faded yellowish orange to orange brown ( Fig. 27 View FIG A-C).

GEOGRAPHICAL DISTRIBUTION. — Andaman Sea and Indian Ocean south of Java.

DEPTH. — Present in samples collected at depths of 312- 870 m.

REMARKS

See Remarks for C. abyssicola .

Wood-Mason (in Wood-Mason & Alcock 1891) described Nectopanope longipes on the basis of a male and a juvenile female from station 56 from a depth of 220-240 fathoms (= 402-439 m). He provided measurements for one specimen (8.5 × 11.7 mm) but did not indicate which one it was, although it is probably the male as this is the adult size for this species. He did not indicate where the site was but the data in Anonymous (1914) indicate that station 56 was between North and South Sentinel I. in the Andamans and was collected between 24 and 25 April 1889. Both specimens are therefore syntypes. Alcock (1900) listed 20 specimens from Andamans and off Travancore.

Serène & Lohavanijaya (1973: pl. 14, fig. D) figured a male “cotype” measuring 10.0 × 12.0 mm deposited at the Zoological Survey of India, Kolkata, but they did not indicate where or from which station it was from. It is not possible to be sure if it is part of the syntype series and/or if the different measurements (original size was given as 8.5 × 11.7 mm) are due merely to them being differently measured. The Investigator specimens we examined (USNM 4691) and those reported by Castro (2007) are all from Travancore and as such, cannot be part of the type series.

Ikeda (1998: 135) recorded a male (16.0 × 22.0 mm) and a female (17.7 × 25.0 mm) “ Carcinoplax longipes ” from 250- 300 m depth in Sagami Bay, Japan. Both specimens agree well with what is here identified as C. verdensis s. str. The figure of a fresh specimen ( Ikeda 1998: pl. 55, fig. 1) also agrees well with the fresh colours of C. verdensis we have observed in specimens from the Philippines ( Fig. 28 View FIG A-F). On the basis of this, as well as on biogeography, it is also likely that the material listed as “ C. longipes ” from Japan by Miyake (1991: 220), Takeda et al. (2006: 204) and Takeda & Yaganisawa (1985: 61) also belong to C. verdensis as presently defined. Both these species have proportionately longer ambulatory legs than C. abyssicola .

The name Nectopanope longipes was actually first used in Anonymous (1891: 56) but both these taxa are nomina nuda. Wood-Mason (in Wood-Mason & Alcock 1891) validated the names and included N. rhodobaphes as a second new species. Huys et al. (2014) clarified the nomenclature of these species, and argued that Nectopanope rhodobaphes is the type species of Nectopanope Wood-Mason in Wood-Mason & Alcock, 1891 . Alcock (1898, 1899) later treated N. longipes as a species of Carcinoplax . Nectopanope is now regarded as a member of the Euryplacidae Stimpson, 1871 sensu Castro & Ng (2010) (see Ng et al. 2019).