Goneplacoides marivenae ( Komatsu & Takeda, 2003 ) 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 : 693-696

Goneplacoides marivenae ( Komatsu & Takeda, 2003) n. comb.

( Figs 28A ; 29 )

? Goneplax maldivensis – Tesch 1918: 35, pl. 9, fig. 1 [ Indonesia].

? Singhaplax nipponensis – Ho et al. 2004: 659, fig. 6E (as Goneplax nipponensis Yokoya, 1933 ) [ Taiwan].

Goneplax marivenae Komatsu & Takeda, 2003: 1244 , figs 1-3, 7A [Philippine Is].

Goneplax megalops Komatsu & Takeda, 2003: 1250 , figs 4-6, 7B [ Japan].

“ Goneplax ” marivenae – Ng & Manuel-Santos 2007: 47, figs 6B, 9B, 10B, 11B, 12B, 13C [Philippine Is].

TYPE MATERIAL. — Goneplax marivenae Komatsu & Takeda, 2003 : tangle nets of local fishermen, ♂ holotype (NSMT-Cr 15531); 1 ♂, 2 ♀♀ paratypes (NSMT-Cr 15532) .

Goneplax megalops Komatsu & Takeda, 2003 : Tansei Maru, cruise KT02-03, ♂ holotype cl 6.0 mm, cw 9.1 mm; 1 pre-adult ♂ paratype, 5 pre-adult ♀♀ paratypes, 2 ovig. ♀♀ paratypes from various localities in Japan (see Komatsu & Takeda 2003: 1250) ( CBM-ZC 7031 ) .

TYPE LOCALITY. — Goneplax marivenae : Philippine Islands, Bohol, Balicasag I., off Panglao I, unrecorded depth. Goneplax megalops: Kerama Is, Ryukyu Is , Japan, 182- 169 m.

MATERIAL EXAMINED. — Japan. Ryukyu Is, Kerama Is, 26°18.86’N, 127°09.01’E, 182- 169 m, RV Tansi- maru, cruise KT02-3, stn E5-2, T. Komai coll., 19.IV.2002, ♂ holotype of Goneplax megalops , cl 6.0 mm, cw 9.1 mm ( CBM-ZC 7031).

Taiwan. TAIWAN 2000, stn CP 35, 22°01.8’N, 120°36.5’E, 228- 222 m, 31.VII.2000, 1 ♂ ( ZRC 2001.2218), 1 ♂ ( MMBA), 1 ♂ ( NTOU).

Philippine Islands. Bohol, Balicasag I., off Panglao I., tangle nets of local fishermen, 50-500 m, 28.XI.2001, 2 ♂♂ ( ZRC 2001.0534 ) ; 200-300 m, VI.2002, 8 ♂♂, 2 ovig. ♀♀ ( ZRC 2002.0648 ) ; 25-30.VII.2003, 2 ♂♂, 1 ovig. ♀ ( ZRC 2004.0724 ) ; 50-500 m, III.2004, 3 ♂♂ ( ZRC 2004.0725 ) .

Indonesia. Kai Is, KARUBAR, stn DW 01, 05°46’S, 132°10’E, 156-305 m, 22.X.1991, 4 ♂♂, 2 ♀♀ ( MNHN- B 29217). — Stn DW 18, 05°18’S, 133°01’E, 205-212 m, 24.X.1991, 1 ♂ ( MNHN-B 29386).

Chesterfield Islands. MUSORSTOM 5, DW 266, 25°20.20’S, 159°45.70’E, 240 m, 8.X.1986, 1 ♀ ( MNHN- B 29314).

New Caledonia. BIOCAL, stn DW 64, 24°48’S, 168°09’E, 250 m, 3.IX.1985, 1 pre-adult ♂ ( MNHN-B 10300 ) ; 1 ovig. ♀ ( MNHN-B 29253 ) .

CHALCAL 2, stn DW 71, 24°42.26’S, 168°09.52’E, 230 m, 27.X.1986, 1 ♂ ( MNHN-B 29234). — Stn DW 80, 23°26.7’S, 168°01.8’E, 180 m, 30.X.1986, 1 undet. sex ( MNHN-B 29235).

SMIB 3, stn DW 10, 24°42.0’S, 168°07.2’E, 235 m, 21.V.1987, 1 ♂, 1 ovig. ♀ ( MNHN-B 29221).

VOLSMAR, stn DW 59, 20°59.9’S, 170°16.9’E, 320 m, 6.VII.1989, 2 ♂♂, 1 ♀ ( MNHN-B 29222 ) ; 1 ♂ ( MNHN-B 24447 ) .

BATHUS 2, stn DW 726, 22°47.3’S, 167°28.7’E, 241- 260 m, 12.V.1993, 1 ♂ ( MNHN-B 29290).

SMIB 5, stn DW 77, 23°40.8’S, 168°01.1’E, 270 m, 7.IX.1989, 1 ovig. ♀ ( MNHN-B 29223). — Stn DW 91, 22°18.4’S, 168°41.1’E, 340 m, 13.IX.1989, 1 ♂ ( MNHN- B 29224). — Stn DW 96, 23°00.0’S, 168°18.7’E, 245 m, 14.IX.1989, 1 ♂ ( MNHN-B 29225).

BERYX 11, stn DW 11, 23°44’S, 168°10’E, 320-350 m, 16.X.1992, 1 pre-adult ♂, 1 ♂, 1 pre-adult ♀, 1 ♀, 1 ovig. ♀ ( MNHN-B 29324) — Stn DW 18, 24°48’S, 168°09’E, 250-270 m, 16.X.1992, 1 pre-adult ♂ ( MNHN-B 29346).

SMIB 8, stn DW 165, 24°47.6’S, 168°09.6’E, 372- 660 m, 28.I.1993, 1 ♂ ( MNHN-B 29347). — Stn DW 177, 23°39’S, 168°00’E, 320-370 m, 29.I.1993, 1 ♀ ( MNHN-B 29262), 1 ♂ ( MNHN-B 29323). — Stn DW 178, 23°45.1’S, 168°17’E, 400 m, 30.I.1993, 1 ♀ ( MNHN-B 29291).

NORFOLK 1, stn DW 1658, 23°26’S, 167°50’E, 320- 336 m, 19.VI.2001, 1 ♂ ( MNHN-B 29340). — Stn DW 1726, 23°18’S, 168°15’E, 185-207 m, 27.VI.2001, 1 ♀ ( MNHN-B 293441).

NORFOLK 2, stn DW 2123, 23°18’S, 168°15’E, 185- 197 m, 2.XI.2003, 1 pre-adult ♂ ( MNHN-B 29764). Loyalty Islands. MUSORSTOM 6, stn DW 399, 20°41.8’S, 167°00.2’E, 282 m, 14.II.1980, 1 ♀ ( MNHN- B 29220). — Stn DW 473, 21°08.8’S, 167°55.3’E, 236 m, 22.II.1980, 1 ♀ ( MNHN-B 29219).

DISTRIBUTION. — Ryukyu Is, Japan ( Komatsu & Takeda 2003, as Goneplax megalops ), Philippine Is ( Komatsu & Takeda 2003, as Goneplax marivenae ), and now from Taiwan, Indonesia (Kai Is), Chesterfield Is, New Caledonia, and Loyalty Is. Depth: 156- 400 m. Also dredged from a station recorded at 372- 660 m.

COLOUR

A photograph of a freshly collected female specimen from New Caledonia ( MNHN-B 29262) showed a mottled light red carapace, chelipeds, and ambulatory legs. Two dark red spots showed on each cheliped, one on the dactylus and one on the distal end of the outer margin of the propodus.

REMARKS

Most of the unique characters of Goneplacoides marivenae n. comb. are discussed in the Description and Remarks for Goneplacoides n. gen. (see above).

Komatsu & Takeda (2003) described Goneplax marivenae from the Philippine Is and G. megalops from Japan (type locality: Kerama Is, Ryukyu Is). Goneplax megalops was described as “most similar” to Goneplax marivenae except that: 1) the outer orbital teeth projected beyond the anterolateral teeth in G. megalops ( Komatsu & Takeda 2003: figs 4a, 7B) but not in Goneplax marivenae , where both teeth have about the same length ( Komatsu & Takeda 2003: figs 4a, 7A); 2) the mesial margins of the G1 of G. megalops were fringed with short simple setae in contrast with the plumose setae that were found along the entire border of the G1 of Goneplax marivenae ; 3) the tip of the G1 of G. megalops was narrower in G. megalops than in Goneplax marivenae ; and 4) Goneplax marivenae was “about twice as large as G. megalops ” ( Komatsu & Takeda 2003: 1249) . All of these differences are explained by the relative size of the specimens used in the two descriptions. Goneplax megalops was described from nine small specimens (cl 3.4 mm, cw 4.6 mm to cl 7.4 mm, cw 11.2 mm; male holotype, cl 6.0 mm, cw 9.1 mm, CBM-ZC 7031) whereas Goneplax marivenae was described from four larger specimens (cl 10.2 mm, cw 15.7 mm to cl 12.3 mm, cw 19.1 mm). Among the specimens from one station in the Kai Is, Indonesia ( MNHN-B 29217), the five smaller individuals (four males and one female, cl 4.5 mm, cw 6.5 mm to cl 5.0 mm, cw 7.4 mm) had outer orbital teeth that projected beyond the anterolateral teeth as in G. megalops , while in the largest one (female, cl 6.8 mm, cw 10.1 mm) the outer orbital teeth did not as in Goneplax marivenae . All of the remaining 53 specimens examined (including the holotype of G. megalops ) during this study, which varied from a pre-adult female (cl 3.4 mm, cw 4.2 mm, MNHN- B 29346) to a female (cl 8.7 mm, cw 13.6 mm, MNHN-B 29223) confirmed that in the smaller individuals (cl shorter than 6.5 mm) the outer orbital teeth always projected beyond the anterolateral teeth but not in the larger individuals. The differences between the G1 of both species are also a function of relative size, the number and type of setae and the relative width of the tip vary according to size. Goneplax megalops , is therefore a synonym of Goneplax marivenae . Both descriptions appear in the same publication but the name Goneplax marivenae is selected as it appears first in the publication, and to prevent confusion since the epithet megalops has already been used in another species.

An incomplete male specimen from Taiwan ( NTOU) appears to be identical to G. marivenae . The specimen is supposedly the same identified as a female of Singhaplax nipponensis ( Yokoya, 1933) (but Goneplax nipponensis in Fig. 6 ) by Ho et al. (2004: 659). The figure, however, shows a slen- der P5 dactylus instead of the broad dactylus of G. marivenae .

Two pre-adult males from Indonesia identified as Goneplax maldivensis , by Tesch (1918: 183, pl. 9, fig. 1) do not belong to this species (actually in Euryplacidae ), an observation previously made by Guinot (1969b: 518). The specimens could belong to G. marivenae instead. The rounded outer orbital angle as depicted by Tesch is not characteristic of G. marivenae but the broad P5 dactylus, the general shape of the carapace, eye peduncles, and abdomen are indeed diagnostic of the species. The specimen ( ZMA De 241733) was unfortunately damaged beyond recognition.

A photograph of a specimen with a completely red carapace had strong resemblance to G. marivenae n. comb. The specimen, collected from the Gemini seamounts east of New Caledonia, was unfortunately lost. It may represent a yet undescribed species of Goneplacoides n. gen.

Figures

FIG. 28. — A, Goneplacoides marivenae (Komatsu & Takeda, 2003) n. comb., ♀, cl 7.6 mm, cw 11.6 mm, off southern coast of New Caledonia, SMIB 8, stn DW 177, 320-370 m (MNHN-B 29262); B, Neogoneplax renoculis (Rathbun, 1914) n. comb., ♂, cl 10.1 mm, cw 16.0 mm, South China Sea off Philippine Is, MUSORSTOM 3, stn CP 108, 188-195 m (MNHN-B 10334); C, Paragoneplax serenei (Zarenkov, 1972) n. comb., ♂, cl 8.6 mm, cw 14.9 mm, north of New Caledonia, BATHUS 1, stn CP 669 (MNHN-B 29327).

FIG. 29. — Goneplacoides marivenae (Komatsu & Takeda,2003) n. comb.,ovig.♀, cl 8.0 mm,cw 12.5 mm,New Caledonia,VOLSMAR, stn DW 59, 320 m (MNHN-B 29222), thoracic sternum and vulva.

FIG. 6. — Carcinoplax tuberosa n. sp.,♂ holotype,cl 6.9 mm, cw 8.8 mm,Matthew and Hunter islands,New Hebrides Ridge,VOLSMAR, stn DW 5, 700 m (MNHN-B 29829): A, dorsal surface of the carapace; B, abdomen; C, left G1, dorsal view; D, left G2, ventral view. Scale bars: A, 5 mm; B, 3 mm; C, D, 1 mm.