Galathea platycheles Miyake, 1953

Macpherson, Enrique & Robainas-Barcia, Aymee, 2015, Species of the genus Galathea Fabricius, 1793 (Crustacea, Decapoda, Galatheidae) from the Indian and Pacific Oceans, with descriptions of 92 new species, Zootaxa 3913 (1), pp. 1-335 : 235-236

Galathea platycheles Miyake, 1953

( Figs 119 C, D)

Galathea platycheles Miyake, 1953: 205 , figs 5, 6 ( Formosa (= Taiwan), shore).— Miyake & Baba, 1966a: 65, figs 6, 7 (KumeIsland, Okinawa Island, Amami-oshima Island, intertidal).— Baba, 1977a: 246 ( Amboina, Lembeh Strait and Obi Major , 0–2 m).— Baba, 1982b: 60 ( Palau, subtidal).— Baba, 1989: 130 (Oshima Strait, Amami-oshima Island, 40 m).— Tirmizi & Javed, 1993: 81, fig. 36 (western Indian Ocean).— Wu et al., 1998: 96, fig. 13 ( Taiwan).—Baba et al., 2008: 75 (compilation).— Baba et al., 2009: 123, fig. 104 ( Taiwan).

Material examined. Madagascar. ATIMO VATAE, Stn TS2, 25°01.3'S, 47°00.5'E, 18 m, 29 April 2010: 1 M 2.2 mm, 1 F 1.4 mm (MNHN-IU-2013-13816).—Stn TM5, 24°56.5'S, 47°07.1'E, intertidal, 30 April/ 6 May 2010: 1 M 2.3 mm (MNHN-IU-2013-13818).— Stn TB4, 25°02.1'S, 47°00.1'E, 11–12 m, 1 May 2010: 1 ov. F 1.5 mm (MNHN-IU- 2010-2733).—Stn TS12, 25°02.5'S, 46°59.7'E, 4–5 m, 9 May 2010: 1 F 1.9 mm (MNHN-IU-2013- 13820).— Stn TB07, 25°02.5'S, 46°59.7'E, 4–5 m, 9 May 2010: 2 M 1.5–1.7 mm, 2 ov. F 2.5–2.7 mm (MNHN-IU- 2013-13819).— Stn TB9, 25°02.3'S, 46°59.6'E, 6–7 m, 10 May 2010: 1 ov. F 2.7 mm (MNHN-IU-2013- 13817).— Stn TB10, 25°09.3'S, 46°45.3'E, 10 m, 11 May 2010: 1 M 1.7 mm (MNHN-IU- 2010-2749).—Stn TS17, 25°09.2'S, 46°45.4'E, 5–6 m, 12 May 2010: 1 M 1.5 mm (MNHN-IU- 2010-2738).— Stn DW3607, 25°45.7'S, 44°52.0'E, 40–41 m, 13 May 2010: 1 F 2.5 mm (MNHN-IU-2013-13811).—Stn TB12, 25°01.5'S, 47°00.0'E, 4–5 m, 14 May 2010: 1 F 2.2 mm (MNHN-IU-2013-13822); 2 M 1.4–2.4 mm, 2 ov. F 1.6–1.9 mm, 1 F 1.3 mm (MNHN-IU-2013-13821).—Stn TB13, 25°01.5'S, 47°00.0'E, 2–4 m, 15 May 2010: 3 M 1.5–1.8 mm, 1 ov. F 2.5 mm, 2 F 1.5–1.7 mm (MNHN-IU- 2010-2724).

Scattered Islands. Juan de Nova, 17.0222°S, 42.6895°E, 7 m, 29 April 2009: 1 ov. F 2.3 mm (UF20729).

Maldives Islands. Magoodhoo Island, 3.07°N, 72.96°E, 10 m, 9 May 2014: 2 ov. F 1.9–2.0 mm (UF39594).

Chagos Islands. Diego Garcia, 8–12 m, February 2012: 1 M 1.8 mm, 1 F 1.5 mm ( OUMNH). Salomon, 8–12 m, February 2012: 1 M 1.5 mm, 4 ov F 1.4–1.8 mm, 2 F 1.4–1.5 mm ( OUMNH). Peros Banhos, 8–12 m, February 2012: 4 M 1.2–1.9 mm, 1 F 1.8 mm ( OUMNH).— February 2013: 2 M 1.6–2.0 mm, 1 ov F 1.6 mm, 1 F 1.2 mm ( OUMNH). Great Chagos Bank - Brothers Island, 8–12 m, February 2012: 3 ov F 2.0– 2.1 mm, 1 F 2.2 mm ( OUMNH).—Nelson Island, 8–12 m, February 2013: 2 M 1.5–1.7 mm, 2 ov F 1.6–2.0 mm ( OUMNH).—Eagle Island, 8–12 m, February 2013: 1 M 1.7 mm ( OUMNH). Egmont Island, 8–12 m, February 2012: 4 M 1.3–2.0 mm, 5 ov F 1.4–1.9 mm, 2 F 2.1–2.2 mm ( OUMNH). Diego Garcia, 8–12 m, February 2012: 1 M 2.3 mm, 1 ov F 2.2 mm, 4 F 1.4–1.8 mm ( OUMNH).

Japan. Okinawa Island. Kunigami Village, NW corner of a small bay near Oku Port, 26°50.772'N, 128°17.149'E, 0–0.1 m, 4 July 2004: 1 ov. F 2.5 mm (UF7230).

Mariana Islands. Guam Island. Apra harbour, 1 m, 6 August 1998: 1 ov. F 2.6 mm (UF231).—Haputo, 8–10 m, 8 July 2003: 1 M 2.3 mm (UF5934).—Tanguisson, no date, 7–25 m: 1 M 2.4 mm (UF7397).

Philippines. Luzon. Pangasinam Province, Marabituka, 16°26.38'N, 119°56.55'E, 5–12 m, 16 July 2004: 1 ov. F 2.4 mm (UF6569).

Australia. Queensland. Lizard island, 17.7429°S, 145.5143°E, 1–2 m, 17 February 2009: 1 ov. F 2.4 mm (UF17114).

Australia. Western Australia. Ningaloo Reef, 22.7°S, 113.6431°E, 1–2 m, 14 May 2009: 1 ov. F 1.8 mm (UF21408); 1 F 1.6 mm (UF21409).—Ningaloo Reef, 22.6612°S, 113.619°E, 8 m, 15 May 2009: 1 ov. F 2.4 mm (UF21446); 1 ov. F 2.2 mm (UF21451); 1 ov. F 2.0 mm (UF21459); 1 ov. F 1.9 mm (UF21461); 1 M 1.6 mm (UF21462).—Ningaloo Reef, 22.7415°S, 113.6836°E, 2–3 m, 15 May 2009: 1 M 2.5 mm (UF21495); 1 M 1.8 mm (UF21499); 1 ov. F 2.3 mm (UF21522).—Ningaloo Reef, 22.6731°S, 113.6303°E, 7 m, 16 May 2009: 1 M 2.5 mm (UF21565); 1 M 2.1 mm (UF21566); 1 M 1.8 mm (UF21567).—Ningaloo Reef, 22.6755°S, 113.684°E, 0 m, 19 May 2009: 1 M 1.9 mm (UF21626); 1 M 2.1 mm (UF21627); 1 M 2.0 mm (UF21628); 1 ov. F 2.5 mm (UF21629); 1 ov. F 2.3 mm (UF21630); 1 M 2.0 mm (UF21631); 1 M 1.7 mm (UF21638).—Ningaloo Reef, 22.7581°S, 113.6491°E, 13 m, 1 May 2009: 1 ov. F 2.2 mm (UF21696); 1 M 2.2 mm (UF21715); 1 M 2.3 mm (UF21716); 1 ov. F 2.0 mm (UF21717); 1 M 1.5 mm (UF21718); 1 F 2.0 mm (UF21720); 1 M 2.6 mm (UF21778); 1 ov. F 2.1 mm (UF21779); 1 ov. F 2.2 mm (UF21781); 1 F 2.2 mm (UF21782); 1 ov. F 2.4 mm (UF21783); 1 M 2.2 mm (UF21784); 1 ov. F 2.0 mm (UF21785); 1 M 1.5 mm (UF21786); 1 ov. F 2.5 mm (UF21790); 1 M 2.3 mm (UF21890); 1 ov. F 2.1 mm (UF21893); 1 M 2.1 mm (UF21896); 1 M 2.3 mm (UF21906); 1 ov. F 2.1 mm (UF21907); 1 M 2.3 mm (UF21908); 1 M 2.1 mm (UF22013); 1 M 2.3 mm (UF22019); 1 ov. F 1.9 mm (UF22020); 1 ov. F 2.0 mm (UF22021); 1 F 2.1 mm (UF22022); 1 ov. F 2.4 mm (UF22023); 1 M 2.0 mm (UF22046); 1 M 1.8 mm (UF22048); 1 M 1.5 mm (UF22052); 1 ov. F 1.7 mm (UF22053); 1 M 2.1 mm (UF22056); 1 M 1.4 mm (UF22065); 1 ov. F 2.2 mm (UF22151); 1 ov. F 2.8 mm (UF22152); 1 M 1.7 mm (UF22183); 1 ov. F 2.2 mm (UF22234); 1 ov. F 2.4 mm (UF22235); 1 M 1.3 mm (UF22237); 1 M 2.0 mm (UF22295); 1 M 1.9 mm (UF22297); 1 M 2.0 mm (UF22298); 1 M 2.1 mm (UF22349); 1 F 1.5 mm (UF22350); 1 ov. F 2.0 mm (UF22352); 1 M 1.8 mm (UF22353); 1 ov. F 2.0 mm (UF22394); 1 ov. F 1.7 mm (UF22396); 1 ov. F 1.8 mm (UF22398); 1 M 2.0 mm (UF22399); 1 M 1.4 mm (UF22400); 1 ov. F 1.9 mm (UF22402); 1 M 1.6 mm (UF22564); 1 M 1.7 mm (UF22566); 1 F 1.7 mm (UF22567); 1 M 1.4 mm (UF22609); 1 ov. F 2.2 mm (UF22644).—Ningaloo Reef, 22.7473°S, 113.0752°E, 11 m, May 2009: 1 F 2.0 mm (UF22732); 1 F 2.3 mm (UF22745); 1 ov. F 2.4 mm (UF22746); 1 ov. F 2.5 mm (UF22748); 1 ov. F 1.8 mm (UF22747); 1 M 2.0 mm (UF22749); 1 M 1.6 mm (UF22751); 1 ov. F 1.9 mm (UF22788); 1 M 2.1 mm (UF22830); 1 ov. F 2.6 mm (UF22835); 1 M 1.7 mm (UF22836); 1 M 2.0 mm (UF22837); 1 ov. F 2.3 mm (UF22838); 1 M 2.4 mm (UF22839); 1 F 2.1 mm (UF22841); 1 M 1.7 mm (UF22842); 1 M 1.7 mm (UF22843); 1 M 1.9 mm, 5 ov. F 1.5-2.2 mm, 2 F 1.5–1.7 mm (UF23442).—Ningaloo Reef, 22.6083°S, 113.6249°E, 10 m, 2 July 2009: 1 M 1.6 mm (UF22403); 1 M 1.9 mm (UF22428); 1 M 2.1 mm (UF22461); 1 ov. F 2.2 mm (UF22467).—Ningaloo Reef, 22.7603°S, 113.6433°E, 14–15 m, 2009: 1 M 2.0 mm, 1 ov. F 2.1 mm (UF23443).—Ningaloo Reef, 22.581°S, 113.7618°E, 13 m, 2009: 3 M 1.4–2.0 mm (UF23444).—Ningaloo Reef, 22.6583°S, 113.6181°E, 13–15 m, 2009: 2 M 1.6–1.8 mm, 1 ov. F 1.8 mm (UF23445).—Ningaloo Reef, 22.6283°S, 113.6436°E, 6–7 m, 16 May 2010: 1 ov. F 2.0 mm (UF27988).—Ningaloo Reef, 22.7691°S, 113.7046°E, 12 m, 17 May 2010: 1 F 1.4 mm (UF27986); 2 M 1.9–2.0 mm, 1 ov. F 2.8 mm (UF28039).—Ningaloo Reef, 22.7691°S, 113.7046°E, 12 m, 18 May 2010: 1 M 3.0 mm (UF28001); 1 M 3.2 mm (UF28003); 3 M 2.3–2.6 mm, 2 ov. F 2.1–2.5 mm (UF28004); 1 M 3.0 mm, 1 ov. F 2.8 mm (UF28017).—Ningaloo Reef, 22.7691°S, 113.7046°E, 12 m, 20 May 2010: 1 F 2.4 mm (UF27818); 1 ov. F 2.8 mm (UF27819); 3 M 2.2–2.9 mm, 5 ov. F 2.0- 2.7 mm (UF27835).—Ningaloo Reef, 22.6206°S, 113.6424°E, 5–6 m, 27 May 2010: 1 ov. F 2.3 mm (UF27593).—Ningaloo Reef, Deep Black Rock Channel, 22.7725°S, 113.6666°E, 30 m, 31 May 2010: 1 M 2.0 mm (UF27660).

Papua New Guinea. PAPUA NIUGINI, Stn PB01, 05°11.3'S, 145°49.4'E, 6–10 m, 30 December 2012: 2 ov. F 2.3–2.4 mm (MNHN-IU-2013-13850).—Stn PB21, 05°01.4'S, 145°48'E, 5 m, 30 December 2012: 3 M 1.3–1.6 mm, 4 F 1.4–1.7 mm (MNHN-IU-2013-13849).

New Caledonia. Lifou Island. LIFOU, Stn 1434, 20°52.5'S, 167°08.1'E, 5–20 m, 6 November 2000: 1 F 1.7 mm (MNHN-IU-2013-13812).—Stn 1410, 20°56.7'S, 167°03.1'E, 2–4 m, 25 November 2000: 1 ov. F 2.1 mm, 1 ov. F 1.9 mm (MNHN-IU-2013-13813); 1 M 1.8 mm (MNHN-IU-2013-13815); 1 ov. F 1.7 mm (MNHN-IU-2013- 13814). Isle of Pines. Platier, August 1993: 1 M 2.3 mm (MNHN-IU-2013-13810).

Coloration. Variable, from reddish to dark brown, sometimes with white spots and flecks on carapace and abdomen. P1 with dark bands on distal part of merus, carpus and palm, tips of fingers white. P2–4 with whitish and dark transverse bands; white band on distal part of merus and propodus. Miyake & Baba (1966) described a different color pattern: overall yellowish white, carapace yellowish gray.

Remarks. The morphological characters are quite constant in all specimens examined, although they came from various localities. However, we have observed a small genetic divergence between the specimens collected from Australia and Madagascar (<3.0%). The divergences with all other species are usually larger than 12.0% (COI), although the smallest divergence is seen between G. paulayi n. sp. (9.3% COI) ( Tab. 1).

Distribution. Japan, Palau island, Mariana Islands, Taiwan, Philippines, Indonesia, Australia, Papua New Guinea, New Caledonia, western Indian Ocean, Maldives Islands, Chagos islands, Scattered Islands, Madagascar; 0–41 m, on Pocillopora spp., rubble, algae , hydroids, under rocks.

Figures

FIGURE 119. Dorsal view. A, Galathea pilosa De Man, 1888, Papua New Guinea, ovigerous female 4.5 mm (MNHN-IU- 2013 - 1055). B, Galathea pilosa De Man, 1888, Maldives, male 3.6 mm (UF 39675). C, Galathea platycheles Miyake, 1953, Madagascar, female 2.2 mm (MNHN-IU- 2013 - 13822). D, Galathea platycheles Miyake, 1953, Western Australia, ovigerous female 1.9 mm (UF 22402). E, Galathea politula n. sp., Vanuatu, holotype, M 3.5 mm (MNHN-IU- 2013 - 9707). F, Galathea polydora n. sp., Vanuatu, male 3.3 mm, (MNHN-IU- 2013 - 9871). G, Galathea polydora n. sp., Vanuatu, ovigerous female 2.5 mm (MNHN-IU- 2013 - 13476). H, Galathea polyphemus n. sp., French Polynesia, male 4.4 mm (UF 15427). I, Galathea providentia Laurie, 1926, Madagascar, female 3.0 mm (MNHN-IU- 2013 - 13802).