Galathea eulimene
- Dataset
- Species of the genus Galathea Fabricius, 1793 (Crustacea, Decapoda, Galatheidae) from the Indian and Pacific Oceans, with descriptions of 92 new species
- Rank
- SPECIES
- Published in
- 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): 1-335, DOI: 10.11646/zootaxa.3913.1.1
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Malacostraca
- order
- Decapoda
- family
- Galatheidae
- genus
- Galathea
- species
- Galathea eulimene
description
Description. Carapace: slightly broader than long; transverse ridges with dense very short setae, and a few scattered long plumose setae; cervical groove distinct, laterally bifurcated. Gastric region with 5 transverse ridges: 1 epigastric ridge medially interrupted, with 2 median spines; 2 mesogastric ridges, anterior medially uninterrupted (interrupted in some paratypes), posterior ridge scale-like; 2 scale-like metagastric ridges. One or two small parahepatic spines, and one hepatic spine, near anterolateral spine, on each side. Anterior branchial region with distinct ridges. Mid-transverse ridge uninterrupted, preceded by shallow cervical groove, followed by 4 ridges, 2 of them uninterrupted. Lateral margins slightly convex, with 7 spines: 2 spines in front of, and 5 spines behind, anterior cervical groove; first anterolateral, well-developed, at same level of lateral limit of orbit, second small, with spine ventral to between first and second spines; 2 spines on anterior branchial region, and 3 spines on posterior branchial margin, last small. Small spine on lateral limit of orbit; infraorbital margin with strong spine. Rostrum 1.2 as long as broad, length 0.6 postorbital carapace length and breadth 0.4 that of carapace; distance between distalmost lateral incisions 0.25 distance between proximalmost lateral incisions; dorsal surface nearly horizontal in lateral view, with some short setae; lateral margin with 4 deeply incised sharp teeth. Pterygostomian flap rugose, unarmed, ridges with short setae, anterior margin acute. Sternum: As long as broad, lateral extremities gently divergent posteriorly. Abdomen: Somites 2 – 4 with 2 transverse uninterrupted ridges; somites 5 and 6 smooth; somite 6 with posteriomedian margin straight. Males with G 1 and G 2. Eyes: Ocular peduncles 1.3 times longer than broad, maximum corneal diameter 0.7 rostrum width. Antennule: Article 1 with 3 well-developed distal spines, distodorsal larger. Ultimate article with a few short fine setae not in tuft on distodorsal margin. Antenna: Article 1 with ventral distomesial spine exceeding distal margin of article 2. Article 2 with 2 subequal distal spines, reaching midlength of article 3. Article 3 with distomesial spine. Article 4 unarmed. Mxp 3: Ischium with small spine on flexor and extensor distal margins; crista dentata with 20 or 21 denticles. Merus as long as ischium; flexor margin with 2 subequal well-developed spines; extensor margin with distal spine and 0 – 2 small additional spines. Carpus with 0 – 3 acute granules or spines along dorsal extensor margin. P 1: 2.5 – 3.0 times carapace length, covered with finely setiferous scales, with scattered long simple setae. Merus as long as carapace, 1.7 times as long as carpus, with spines arranged roughly in rows, dorsomesial spines stronger; distal spines prominent. Carpus as long as palm, twice longer than broad; dorsal and lateral surfaces with some spines; mesial margin with 5 spines (distal second strong). Palm twice longer than broad, lateral and mesial margins subparallel; spines arranged roughly in dorsolateral and dorsomesial rows; dorsolateral row continuing along entire fixed finger; row of spines along dorsal side. Fingers as long as palm, each finger with two rows of teeth distally spooned; movable finger unarmed. P 2 – 4: moderately slender, with setose striae and sparse long plumose setae. P 2 2.1 times carapace length. Meri successively shorter posteriorly (P 3 merus 0.9 length of P 3 merus, P 4 merus 0.8 length of P 2 merus); P 2 merus as long as carapace, 4.0 times as long as broad, 1.5 times longer than P 2 propodus; P 3 merus 3.2 times as long as broad, 1.3 times longer than P 3 propodus; P 4 merus 2.7 times as long as broad, as long as P 2 propodus. Extensor margin of P 2 – 3 meri with row of 8 or 9 proximally diminishing spines, 2 or 3 spines on P 4; ventral margins distally ending in strong spine followed proximally by 0 – 1 spines and several eminences; lateral sides unarmed. Carpi with 5 or 6 spines on extensor margin on P 2 – 3, 0 – 3 spines on P 4; lateral surface with 3 or 4 small spines or acute granules sub-paralleling extensor margin; flexor distal margin acute. P 2 – 4 propodi 5.0 times as long as broad; extensor margin with 3 or 4 proximal spines on P 2 – 4; flexor margin with 4 slender movable spines (6 in P 2 in only one specimen). Dactyli distally ending in well-curved strong spine, length 0.5 that of propodi; flexor margin with 4 proximally diminishing teeth, terminal one prominent. Epipods present only on P 1. Coloration. Translucent reddish brown or whitish overall. Numerous minute red spots on carapace and abdomen. Carapace sometimes, with one greenish spot on each side of mid-transverse ridge. Abdominal somites 2 – 4 each with some white spots. P 1 with reddish stripe on distal portion of merus, carpus, palm and proximal half of fingers; white stripe on median portion of palm and distal half of fingers; spines red. P 2 – 4 with reddish band on distal part of merus, carpus and median part of propodus; white band on distal part of fingers.
discussion
Remarks. The new species is very close to G. algae Baba, 1969. However, both species can be differentiated by the relative length of the articles of the walking legs. The P 2 – 4 propodi are 3 – 4 times longer than broad in G. algae, instead of five times longer than broad in G. e u l i m e n e.
distribution
Distribution. Red Sea, Seychelles Islands, Scattered Islands, Comore Island, La Reunion, Maldive Islands, Chagos Islands; 0 – 50 m, on Pocillopora spp., Acropora spp., Stylophora spp., rocks.
etymology
Etymology. The name Eulimene, good haven, refers to one of the Nereids of Greek mythology. The name is considered as a substantive in apposition.
materials_examined
Material examined. Holotype: Scattered Islands. Glorieuses, 11.5813 ° S, 47.3413 ° E, 13 – 14 m, 8 May 2009: M 3.2 mm (UF 21038). Paratypes: Red Sea. Sudan, Al Bahr al Ahmar. Sanganeb, SAN 31, 70 m, 1 July 1991: 1 juv. 1.8 mm (SMF). Red Sea. Gulf of Aqaba, Ferry Port, 5 m, 12 July 1995: 1 M 3.0 mm, 1 F 2.6 mm (SMF). — 5 – 10 m, 22 July 1995: 1 M 3.4 mm, 1 ov. F 3.0 mm (SMF). Marine Science Station, AQ 44, 5 m, 9 July 1995: 1 ov. F 2.6 mm (SMF). — AQ 55, 13 m, 11 July 1995: 1 ov. F 2.7 mm, 2 F 2.5 – 2.6 mm (SMF). — 8 m, 19 July 1995: 1 F 2.7 mm (SMF). Sudan, Al Bahr al Ahmar. Sanganeb, SAN 17, 20 m, 29 March 1991: 1 F 2.0 mm (SMF). — SAN 21, 20 m, 29 March 1991: 2 M 2.2 – 2.6 mm, 1 ov. F 3.0 mm (SMF). — SANGANEB, 0 m, 29 March 1991: 1 M 1.8 mm (SMF). — SAN 33, 20 m, 30 March 1991: 2 M 2.6 – 3.0 mm, 1 ov. F 3.0 mm, 1 F 2.4 mm (SMF). — SAN 51, 1 m, 30 March 1991: 1 M 2.7 mm, 1 F 2.8 mm (SMF). SAN 52, 12 m, 1 April 1991: 3 M 2.6 – 3.0 mm, 1 ov. F 2.8 mm, 1 F 3.0 mm (SMF). — SAN 42, 12 m, 2 April 1991: 3 M 2.2 – 2.5 mm, 1 ov. F 3.1 mm, 1 F 2.4 mm (SMF). — SAN 34, 13 m, 3 April 1991: 1 F 2.4 mm (SMF). — SAN 1, 15 m, 4 April 1991: 2 F 2.0 – 2.1 mm (SMF). — SAN 25, 11 m, 8 April 1991: 3 M 2.0 – 2.5 mm, 1 ov. F 3.1 mm, 2 F 2.0 – 2.1 mm (SMF). — SAN 26, 12 m, 9 April 1991: 2 M 2.5 – 3.2 mm (SMF). — SAN 45, no depth, 15 April 1991: 4 M 2.4 – 2.8 mm, 3 ov. F 2.3 – 2.7 mm (SMF). — SAN 170, 20 September 1992: 1 M 2.6 mm (SMF). — SAN 114, 50 m, 25 September 1992: 6 M 1.8 – 2.4 mm, 1 ov. F 2.5 mm, 4 F 1.6 – 2.4 mm (SMF). — SAN 128, 30 m, 26 September 1992: 1 M 1.8 mm (SMF). — SAN 117, 14 m, 27 September 1992: 3 M 2.3 – 2.6 mm, 2 ov. F 2.2 – 2.6 mm, 2 F 2.0 – 2.2 mm (SMF). — SAN 113, 30 m, 27 September 1992: 2 M 2.1 – 2.6 mm, 1 ov. F 2.5 mm, 1 F 2.0 mm (SMF). — SAN 135, 10 m, 28 September 1992: 1 F 2.1 mm (SMF). — SAN 111, 6 m, 29 September 1992: 1 M 1.8 mm (SMF). — SAN 118, 12 m, 29 September 1992: 10 M 2.4 – 3.4 mm, 4 ov. F 3.1 – 3.5 mm, 2 F 2.5 – 2.6 mm (SMF). — SAN 139, 30 m, 29 September 1992: 2 ov. F 2.3 – 2.4 mm (SMF). — SAN 125, 14 m, 30 September 1992: 11 M 1.6 – 2.1 mm, 9 F 1.4 – 2.2 mm (SMF). — SAN 144, 8 m, 1 October 1992: 3 M 2.1 – 2.6 mm, 2 F 2.0 – 2.3 mm (SMF). — SAN 146, 6 - 10 m, 1 October 1992: 1 M 3.2 mm (SMF). — SAN 105, 1 m, 2 October 1992: 5 M 2.1 – 2.5 mm, 1 ov. F 2.3 mm, 1 F 2.1 mm (SMF). — SAN 110, 31 m, 2 October 1992: 2 M 2.0 – 2.2 mm, 1 ov. F 2.1 mm (SMF). — SAN 124, 41 m, 2 October 1992: 1 ov. F 2.8 mm (SMF). — SAN 106, 6 – 10 m, 3 October 1992: 2 M 3.0 – 3.2 mm, 2 ov. F 2.9 – 3.1 mm, 3 F 2.8 – 3.2 mm (SMF). — SAN 47, no depth, 1991: 4 M 2.1 – 2.4 mm, 3 ov. F 2.5 – 2.8 mm, 4 F 2.0 – 2.3 mm (SMF). Port Sudan, Wingate Reef. SAN 166, 5 m, 21 September 1992: 2 ov. F 2.3 – 2.5 mm (SMF). — SAN 169, 4 m, 22 September 1992: 4 M 2.0 – 2.8 mm, 1 ov. F 2.4 mm, 1 F 2.2 mm (SMF). Red Sea. Djibouti. Gulf of Tadjoura, 11.5515 ° N, 42.7006 ° E, 1 - 8 m, 29 September 2012: 1 F 3.4 mm (UF 32841). Red Sea. Saudi Arabia. Thuwai. Al-Fahal reef, 1 – 37 m, 8 October 2012: 1 F 2.1 mm (UF 33083). — 22.2741 ° N, 39.0512 ° E, 5 m, 10 October 2012: 2 M 1.7 – 2.2 mm (UF 33063). — Shark reef, 22.4268 ° N, 38.9963 ° E, 18 March 2013: 1 M 1.9 mm (UF 36029); 1 M 4.1 mm (UF 36057); 1 ov. F 3.3 mm (UF 37112); 2 M 1.7 – 2.8 mm (UF 37130). — 22.2227 ° N, 38.9677 ° E, exposed side of reef, 19 March 2013: 1 ov. F 2.8 mm (UF 37135); 1 ov. F 2.5 mm (UF 37136). — Abu Shosha Reef, 22.2044 ° N, 39.047 ° E, 7 – 8 m, 23 March 2013: 1 M 1.9 mm (UF 37403). Farasan Banks, Pelican Island, 18.6595 ° N, 40.827 ° E, 1 – 2 m, 5 March 2013: 1 ov. F 2.0 mm (UF 36540); 1 M 2.2 mm (UF 36551). — Farasan Banks, Dolphen Lagoon, 19.0053 ° N, 40.1482 ° E, 1 – 7 m, 4 March 2013: 1 ov. F 2.4 mm (UF 36589); 1 ov. F 2.3 mm (UF 36604). Shib Radib, 18.0731 ° N, 40.8859 ° E, 7 – 9 m, 8 March 2013: 1 F 3.3 mm (UF 36735); 5 M 2.4 – 3.2 mm, 4 ov. F 2.6 – 3.9 mm, 1 F 1.8 mm (UF 36821). Marca Is., 18.0731 ° N, 40.8859 ° E, 7 – 9 m, 8 March 2013: 1 M 2.7 mm (UF 36820). Shi'b Ammar, 19.5707 ° N, 40.0088 ° E, 2 – 20 m, 3 March 2013: 1 M 3.1 mm (UF 35961). Red Sea. Al Lith, 20 ° 15.554 ' N, 39 ° 56 ' E, 4 – 5 m, 8 March 2012: 4 M 2.3 – 3.2 mm, 1 ov. F 2.4 mm (SMF). Red Sea. Saudi Arabia, Al Wajh, 25.3919 ° N, 36.6839 ° N, 10 - 30 m, 25 September 2013: 1 ov. F 3.0 mm (UF 36349), 2 M 2.7 - 3.6 mm, 1 ov. F 2.0 mm, 1 F 2.0 mm (UF 36350), 1 ov. F 3.0 mm (UF 36360). Jaz'air, 27.6384 ° N, 35.3062 ° E, 10 m, 27 September 2013: 1 M 2.7 mm, 1 ov. F 3.4 mm (UF 36438). Gulf of Aqaba, 28.4039 ° N, 34.7407 ° E, 10 m, 29 September 2013: 1 ov. F 2.9 mm (UF 38054), 1 ov. F 2.2 mm (UF 38067). — 28.4039 ° N, 34.7407 ° E, 20 m, 29 September 2013: 1 F 1.8 mm (UF 38088). — 28.4039 ° N, 34.7407 ° E, 20 – 25 m, 30 September 2013: 4 M 2.0 – 2.4 mm, 1 ov. F 2.2 mm, 3 F 1.8 – 2.0 mm (UF 38101). Yanbu, 24.4427 ° N, 37.2477 ' E, 3 – 22 m, 4 October 2013: 1 ov. F 2.3 mm (UF 38289). Seychelles Islands. Aldabra Island. 42 m, 23 May 1954: 2 ov. F 2.5 - 2.7 mm (MNHN-Ga 775, 771, MNHN-IU- 2013 - 14277). Comore Island. BENTHEDI, Stn 32 R, 12 ° 45.1 ' S, 45 ° 17.9 ' E, 15 – 20 m, 25 March 1977: 3 M 1.7 – 2.1 mm, 3 F 1.6 – 2.0 mm (MNHN-IU- 2013 - 13967). Mayotte Island, 12.7605 ° S, 45.068 ° E, 3 m, 30 May 2008: 1 ov. F 3.4 mm (UF 13580). — 12.8551 ° S, 45.2686 ° E, 6 – 9 m, 2 June 2008: 1 M 3.0 mm (UF 13653). Scattered Islands. Glorieuses, 11.5909 ° S, 47.2851 ° E, 7 – 14 m, 4 May 2009: 1 M 2.0 mm (UF 21177); 1 ov. F 3.2 mm (UF 21282). — 11.5916 ° S, 47.2853 ° E, 17 m, 5 May 2009: 1 M 2.5 mm (UF 21270). La Reunion. Pierre au Prefet, 10 – 19 m, 21.0625 ° S, 55.2128 ° E, 15 August 2007: 1 M 3.0 mm (UF 12841). Maldives Islands. Dhign Reef, 3.0803 ° N, 72.9827 ° E, 5 m, 13 May 2014: 1 ov. F 2.9 mm (UF 39661), 1 ov. F 2.2 mm (UF 39662). Magoodhoo Island, 3.077 ° N, 72.969 ° E, 12 m, 14 May 2014: 2 F 2.5 – 3.2 mm (UF 39677), 1 M 2.7 mm (UF 39703). Chagos Islands. Diego Garcia, 8 – 12 m, February 2012: 10 F 1.3 – 1.5 mm (OUMNH). Solomon, 8 – 12 m, February 2012: 4 M 1.8 – 3.5 mm, 3 ov F 2.4 – 4.2 mm, 15 F 1.4 – 2.5 mm (OUMNH). Peros Banhos, 8 – 12 m, February 2012: 15 M 1.3 – 3.7 mm, 5 ov F 1.5 – 2.7 mm, 7 F 1.3 – 2.8 mm (OUMNH). Great Chagos Bank, Brothers Island, 8 – 12 m, February 2012: 3 M 1.6 – 2.4 mm, 2 ov. F 3.3 – 3.6 mm, 4 F 1.2 – 2.3 mm (OUMNH). Great Chagos Bank, Eagle Island, 8 – 12 m, February 2012: 1 ov F 2.8 mm, 12 F 1.2 – 2.0 mm (OUMNH). Egmont Island, 8 – 12 m, February 2012: 6 M 1.5 – 3.6 mm, 8 F 1.3 – 1.5 mm (OUMNH).
Name
- Homonyms
- Galathea eulimene