Galathea anouchkae , Macpherson, Enrique & Robainas-Barcia, Aymee, 2015

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: 44-46

publication ID

http://dx.doi.org/10.11646/zootaxa.3913.1.1

publication LSID

lsid:zoobank.org:pub:18D06EC6-A61D-4C45-9B5E-52435903556D

persistent identifier

http://treatment.plazi.org/id/03B3F979-FFD8-420B-FF6D-FF4F0132E862

treatment provided by

Plazi

scientific name

Galathea anouchkae
status

n. sp.

Galathea anouchkae  n. sp.

( Fig. 10View FIGURE 10)

Material examined. Holotype: Fiji. MUSORSTOM 10, Stn CP1364, 18° 11.95 'S, 178 ° 34.50 'E, 80–86 m, 15 August 1998: 1 F 2.5 mm (MNHN-IU- 2013-8371).

Paratypes: Fiji. MUSORSTOM 10, Stn CP1364, 18° 11.95 'S, 178 ° 34.50 'E, 80–86 m, 15 August 1998: 1 ov. F 3.0 mm, 1 F 2.7 mm (MNHN-IU- 2013-8370). SUVA, Stn DW08, 18 ° 22.3 'S, 178 °02.4'E, 28–30 m, 24 September 1999: 1 M 4.2 mm (MNHN-IU- 2013-8378).

Vanuatu. MUSORSTOM 8, Stn CP961, 20° 18.50 'S, 169 ° 49.90 'E, 100–110 m, 21 September 1994: 3 M 3.4–3.9 mm, 3 ov. F 2.9–3.8 mm (MNHN-IU- 2013-8376), 1 ov. F 3.4 mm (MNHN-IU- 2013-8372).— Stn DW966, 20° 18.80 'S, 169 ° 51.91 'E, 128–150 m, 21 September 1994: 1 M 3.2 mm, 1 ov. F 3.4 mm, 1 F 3.0 mm (MNHN-IU- 2013-8379). TERRALIS, Stn D9, 16° 39.635 'S, 167 ° 52.270 'E, 136 m, 12 December 2003: 1 ov. F 3.3 mm (MNHN- IU- 2013-8377).

New Caledonia. Chesterfield Islands. CHALCAL 84, Stn D29, 19° 30.60 'S, 158 ° 31.10 'E, 100 m, 19 July 1984: 2 M 3.0– 3.2 mm (MNHN-IU- 2013-8381). New Caledonia. NORFOLK 2, Stn CP2141, 23°00.52'S, 168 ° 19.80 'E, 92–100 m, 3 November 2003: 1 M 4.8 mm (MNHN-IU- 2013-8373). Lifou Island. LIFOU, Stn 1648, 20° 54.1 'S, 167 °03.3'E, 150–200 m, 0 7 November 2000: 1 M 3.6 mm (MNHN-IU- 2013-8374), 1 F 3.5 mm (MNHN-IU- 2013- 8375).— Stn 1462, 20° 47.1 'S, 167 °03.2'E, 70–120 m, 21 November 2000: 1 F 3.4 mm (MNHN-IU- 2013-8380).

Etymology. This species is dedicated to Anouchka Krygelmans-Sato of the Muséum nationale d’Histoire Naturelle, Paris, for her support to crustacean collections.

Description. Carapace: as long as broad; transverse ridges with dense short setae, and a few scattered long non-plumose setae; cervical groove distinct, laterally bifurcated into anterior and posterior parts. Gastric region with 5 transverse ridges: 1 epigastric ridge with 2 submedian spines and medially interrupted; 1 protogastric ridge uninterrupted, with 1 small parahepatic spine on each side; 1 mesogastric ridge medially interrupted, not extending laterally to anterior branchial ridges; 2 metagastric ridges, anterior medially interrupted, and extending laterally to anterior branchial ridges, posterior ridge very short. One small hepatic spine on each side. Anterior branchial region with distinct ridges. Mid-transverse ridge uninterrupted, followed by 5 transverse ridges. Lateral margins slightly convex medially, with 7 spines: 2 spines in front of, and 5 spines behind, anterior cervical groove; first spine (anterolateral), well-developed, at same level of lateral limit of orbit, second spine small, located at midlength between anterolateral spine and anteriormost spine of branchial margin, accompanied by 1 additional spine ventral to between first and second; 2 spines on anterior branchial margin, posterior one smaller than anterior one, and 3 spines on posterior branchial margin, last small. Small spine on external limit of orbit; infraorbital margin with strong spine. Rostrum 1.6 times as long as broad, length 0.6 of postorbital carapace length and breadth 0.4 of carapace width; distance between distalmost lateral incisions 0.25 of distance between proximalmost lateral incisions; dorsal surface nearly horizontal in lateral view, with a few setose scales; lateral margin with 4 deeply incised sharp teeth.

Pterygostomian flap rugose, unarmed, ridges with short setae, anterior margin acutely pointed.

Sternum: As long as broad, lateral extremities gently divergent posteriorly.

Abdomen: Somites 2–4 each with anterior transverse ridge, and 1 additional uninterrupted or medially interrupted ridge; somites 5 and 6 each with 1 medially interrupted ridge, posteromedian margin of somite 6 straight. Males with G 1 and G 2.

Eyes: Ocular peduncles 1.3 times longer than broad, maximum corneal diameter 0.7 of rostrum width.

Antennule: Article 1 with 3 well-developed distal spines, distodorsal larger, distomesial spine smaller than others. Ultimate article with tuft of fine setae on distodorsal margin.

Antenna: Article 1 with distomesial spine reaching distal margin of article 2. Article 2 with 2 well-developed distal spines, distomesial spine slightly longer than distolateral and reaching midlength of article 3. Article 3 with small distomesial spine. Article 4 unarmed.

Mxp 3: Ischium with small spine on flexor and extensor distal margins; crista dentata with 18–20 denticles. Merus shorter than ischium; flexor margin with 2 subequal spines; extensor margin unarmed.

P 1: 1.9 times carapace length, covered with finely setiferous scales, with some long setae. Merus 0.8 times carapace length, 5 times as long as carpus, with some spines, dorsomesial spines stronger; distal spines prominent. Carpus 0.5 length of palm, 2.5 times as long as broad; dorsal and lateral surfaces with some spines; mesial margin with 3 or 4 spines (distal second strong). Palm 1.8 times longer than broad, lateral and mesial margins slightly convex; spines arranged in dorsolateral and dorsomesial rows, former extending onto fixed finger; dorsal surface with scattered some small spines. Fingers slightly longer than palm, movable fingers unarmed; each finger distally with two rows of teeth, spooned.

P 2–4: moderately slender, with setose striae and sparse long plumose setae. P 2 1.8 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 3 merus); P 2 merus 0.7 carapace length, 5.0 times as long as broad, 1.5 times longer than P 2 propodus; extensor margins each with row of 7–9 proximally diminishing spines on P 2 –3, 2 spines on P 4; ventral margins distally ending in strong spine followed proximally by 0–1 spines and several transverse ridges, lateral sides unarmed in P 2–3, bearing 2 or 3 spines in P 4. Carpi each with 3 or 4 spines on extensor margin in P 2–3, unarmed in P 4; lateral surfaces each with 1–3 spines or granules sub-paralleling extensor margin; flexor distal margins acute. Propodi 4.3–4.9 times as long as broad; extensor margins each with 0–2 proximal spines; flexor margins each with 4 slender movable spines. Dactyli distally ending in strongly curved strong spine, length 0.6–0.7 that of propodi; flexor margins each with 4 or 5 proximally diminishing teeth, terminal one prominent.

Epipods absent on pereiopods.

Remarks. The new species is closely related to G. e r yt h r i n a n. sp. from the Red Sea and G. c et i n. sp. from Papua New Guinea and New Caledonia (see the differences in Remarks of these species).

Distribution. New Caledonia, Chesterfield Islands, Vanuatu, Fiji, 28– 200 m.