Paragoneplax serenei ( Zarenkov, 1972 ) Castro, 2007

Castro, Peter, 2007, A reappraisal of the family Goneplacidae MacLeay, 1838 (Crustacea, Decapoda, Brachyura) and revision of the subfamily Goneplacinae, with the description of 10 new genera and 18 new species, Zoosystema 29 (4), pp. 609-774 : 710-711

publication ID	https://doi.org/ 10.5281/zenodo.4525564
persistent identifier	https://treatment.plazi.org/id/102B87CB-FFE7-2504-FC80-FAE5FC94FA97
treatment provided by	Felipe
scientific name	Paragoneplax serenei ( Zarenkov, 1972 )
status	comb. nov.

Treatment

Paragoneplax serenei ( Zarenkov, 1972) View in CoL n. comb.

( Fig. 28C View FIG )

Goneplax serenei Zarenkov, 1972: 231 View in CoL , figs 3, 7-2, 7-3 (as Geneplax [sic] serenei ) [ Vietnam]. — Komatsu & Takeda 2003: 1243 [in list]. — Chen 1998: 283, 310 [in list], fig. 12 [South China Sea].

TYPE LOCALITY. — Vietnam, Gulf of Tonkin.

TYPE MATERIAL. — Deposit unknown ( ZMMU?).

MATERIAL EXAMINED. — Philippine Islands. South China Sea, MUSORSTOM 1, stn CP 45, 13°46.0’N, 120°23.8’E, 100-108 m, 24.III.1976, 1 ♂ ( MNHN-B 10295). — Stn

CP 56, 13°53.1’N, 120°08.9’E, 134- 129 m, 26.III.1976, 12 ♂♂, 12 ♀♀ ( MNHN-B 10290). — Stn CP 72, 14°11.8’N, 120°28.7’E, 127- 122 m, 28.III.1976, 5 ♀♀ ( MNHN-B 10332).

Bohol, off Cortez, tangle nets of local fishermen, 180 m, T. J. Arbasto coll., 25.III.2004, 1 ♂ ( ZRC 2004.0785).

PANGLAO 2005, stn CP 2408, Maribohoc Bay, 09°43.5’N, 123°47.1’E, 121-137 m, 1.VI.2005, 1 ♂ ( ZRC 2006.0220).

Solomon Islands. SALOMON 2, stn CP 2284, 08°38.4’S, 157°21.5’E, 195-197 m, 6.XI.2004, 1 ♂ ( MNHN-B 30102).

Vanuatu. MUSORSTOM 8, CP 1071, 15°36.63’S, 167°16.34’E, 180-191 m, 4.X.1994, 1 pre-adult ♂ ( MNHN-B 29295 ). — CP 1077, 16°04.00’S, 167°06.09’E, 180-210 m, 5.X.1994, 1 pre-adult ♂ ( MNHN-B 29296 ). — CP 1086, 15°36.58’S, 167°16.32’E, 182-215 m, 5.X.1994, 1 ♂ ( MNHN-B 29297 ) GoogleMaps ; 1 ♂ ( MNHN-B 30140 ) GoogleMaps .

New Caledonia. LAGON, stn DW 829, 20°46.5’S, 165°18.4’E, 160-200 m, 10.I.1987, 1 ♂ ( MNHN- B 29779). — Stn DW 835, 20°46.8’S, 165°17.3’E, 135-150 m, 11.I.1987, 1 ♂, 1 ♀ ( MNHN-B 29776 ) GoogleMaps ; 1 ♀ ( MNHN-B 29778 ). — Stn DW 1147, 19°07.5’S, 163°30.4’E, 210 m, 28.X.1989, 1 ♀ ( MNHN-B 29298 ) GoogleMaps .

BATHUS 1, stn CP 667, 20°57.2’S, 165°34.6’E, 205- 212 m, 14.III.1993, 1 ♀ ( MNHN-B 29299). — Stn CP 668, 20°57.21’S, 165°34.57’E, 205-219 m, 14.III.1993, 1 ♂, 1 ♀ ( MNHN-B 29352). — Stn CP 669, 20°57.3’S, 165°35.3’E, 255-280 m, 14.III.1993, 1 ♂ ( MNHN-B 29327).

Fiji. MUSORSTOM 10, stn CP 1323, 17°16.1’S, 177°45.7’E, 143-173 m, 7.VIII.1998, 1 ♂, 1 ♀ ( MNHN- B 29257). — Stn DW 1334, 16°51.4’S, 178°13.9’E, 251-257 m, 9.VIII.1998, 1 ovig. ♀ ( MNHN-B 29258). — Stn DW 1349, 17°32.5’S, 178°37.5’E, 198-200 m, 11.VIII.1998, 1 ♂ ( MNHN-B 29355). — Stn DW 1350, 17°31.1’S, 178°38.8’E, 244-252 m, 11.VIII.1998, 1 ♂ ( MNHN-B 29300). — Stn DW 1359, 17°49.7’S, 178°47.8’E, 183-188 m, 13.VIII.1998, 1 ovig. ♀ ( MNHN-B 29260).

BORDAU 1, stn CP 1403, 16°40’S, 179°36’E, 220- 224 m, 25.II.1999, 1 ♀ ( MNHN-B 29301).

DISTRIBUTION. — South China Sea ( Zarenkov 1972; Chen 1998) and now from the Philippine Is, Solomon Is, Vanuatu, New Caledonia, and Fiji. Depth: 53- 280 m.

COLOUR

A photograph of a freshly collected male from Vanuatu (Santo 2006 expedition; ZRC) shows a light-orange carapace, slightly lighter on the posterior half. The anterior and anterolateral margins of the carapace, as well as a thin, curved band on the cardiac region of the carapace, are dark orange. The chelipeds are light orange with dark orange margins.

REMARKS

The abundant material from the Philippine Is to Fiji that was examined agrees with the description. Zarenkov’s illustration of the distal part of the G1 ( Zarenkov 1972: fig. 7-2, as Goneplax serenei ), however, departs from that of the material examined. The tip is shown as broad (almost leaf-like) and bordered by small spines on one side and by short setae on the other. The morphology of the G1 of the specimens examined varies according to size. It is slender in pre-adults ( Chen 1998: fig. 12-7, as G. serenei ) but uniquely bent distally ( Chen 1998: fig. 12-6, as G. serenei ). The tip, although often slightly expanded distally has never shown a broad, leaf-like expansion bordered by setae and small spines as that illustrated by Zarenkov 1972. The type material (presumably at ZMMU) could not be examined so this particular character could not be verified. It is possible that Zarenkov’s figure was mislabelled as in some of the other figures in his paper (see Castro 2000: 523, 551).

Also characteristic of P. serenei n. comb. are the flattened, shovel-like chelipeds (P1), the absence of anterolateral teeth, and the presence of a distal tooth on the ambulatory leg (P2-P5) meri ( Fig. 28C View FIG ). Also characteristic is an iridescent region at the distal end of the peduncles. It remains visible in specimens that have been preserved for almost thirty years. Other diagnostic characters of the species are given in the description of Paragoneplax n. gen. (see above).