Galathea barbata , 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: 57-59

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-FFCB-421C-FF6D-FF4F0668E9D1

treatment provided by

Plazi

scientific name

Galathea barbata
status

n.sp.

Galathea barbata  n.sp.

( Fig. 15View FIGURE 15)

Material examined. Holotype: New Caledonia. Chesterfield Islands. CORAIL 2, Stn DW9, 20° 53 'S, 161 ° 35 'E, 62 m, 20 July 1988: 1 M 3.9 mm (MNHN-IU- 2013-15845).

Paratypes: New Caledonia. Chesterfield Islands. CHALCAL 84, Stn D1, 21° 15.04 'S, 162 ° 15.41 'E, 48 m, 13 July 1984: 1 M 2.9 mm, 1 ov. F 2.7 mm (MNHN-IU- 2013-15854).—Stn D36, 19° 45.37 'S, 158 ° 32.03 'E, 50 m, 21 July 1984: 1 ov. F 3.3 mm (MNHN-IU- 2013-15846).—Stn D51, 21° 13.21 'S, 158 ° 42.50 'E, 55 m, 24 July 1984: 1 M 3.2 mm, 1 ov. F 4.0 mm (MNHN-IU- 2013-15853).—Stn D55, 21° 23.90 'S, 158 ° 59.60 'E, 55 m, 25 July 1984: 1 M 4.3 mm (MNHN-IU- 2013-15847).—Stn CP15, 21° 24.90 'S, 159 °09.30'E, 60 m, 25 July 1984: 1 M 4.0 mm (MNHN-IU- 2013-15851). CORAIL 2, Stn DW8, 20° 52 'S, 161 ° 38 'E, 63 m, 20 July 1988: 3 ov. F 3.6–3.7 mm (MNHN-IU- 2013-15848).—Stn CP22, 20° 33 'S, 161 °01'E, 85–88 m, 22 July 1988: 1 M 3.5 mm (MNHN-IU- 2013- 13971).— Stn CP24, 20° 27 'S, 161 °05'E, 74–75 m, 22 July 1988: 1 M 3.5 mm (MNHN-IU- 2013-15850).—Stn DW115, 19° 22 'S, 158 ° 38 'E, 44 m, 28 July 1988: 1 ov. F 3.8 mm (MNHN-IU- 2013-15849).— Stn DW165, 19° 41 'S, 158 ° 19 'E, 45 m, 2 August 1988: 1 ov. F 3.5 mm (MNHN-IU- 2013-15852).

New Caledonia. Pines Island. Stn 583, 22° 45 'S, 167 ° 29 'E, 44 m, 18 July 1985: 1 M 3.8 mm (MNHN-IU- 2013- 13972).

Etymology. From the Latin barbatus, bearded, in reference to the numerous setae on the body.

Description. Carapace: As long as broad; transverse ridges with dense short setae and some scattered long non-plumose setae; cervical groove distinct, laterally bifurcated into anterior and posterior parts. Gastric region with 8 transverse ridges: 1 epigastric ridge uninterrupted, with 2 submedian spines; 2 protogastric ridges, anterior one uninterrupted, medially convex, with 1 parahepatic spine on each side, posterior ridge medially interrupted; median scale between posterior protogastric ridge and anterior mesogastric ridge; 2 mesogastric ridge, anterior ridge uninterrupted, not extending laterally to anterolateral spines, posterior ridge scale-like; 3 metagastric ridges not extending laterally to anterior branchial region, posterior one very short; some additional scattered scale-like ridges between main ridges. Anterior branchial region with distinct ridges. Mid-transverse ridge uninterrupted, preceded by cervical groove, followed by 6 transverse ridges, 3 of them uninterrupted. Lateral margins convex medially, with 8 spines: 2 spines in front of and 6 spines behind anterior cervical groove; first (anterolateral) spine well-developed, behind level of lateral limit of orbit; second spine small, located at midlength between anterolateral spine and anteriormost spine of branchial margin, with strong additional spine ventral to between first and second spines; 3 spines on anterior branchial margin, and 3 spines on posterior branchial margin, last small. External limit of orbit with spine; infraorbital margin with strong spine. Rostrum 1.8 as long as broad, length 0.6 of postorbital carapace length and breadth 0.3 of carapace breadth; distance between distalmost lateral incisions 0.3 of distance between proximalmost lateral incisions; dorsal surface nearly horizontal in lateral view, with numerous setae; lateral margin with 4 deeply incised sharp teeth.

Pterygostomian flap rugose, unarmed, ridges with short setae, anterior margin ending in spine.

Sternum: 0.8 times as long as broad, lateral extremities gently divergent posteriorly. Some specimens with 1 spine on each side of distolateral margin of sternite 4.

Abdomen: Somites 2–3 each with 4 uninterrupted transverse ridges on tergite; somite 4 with 2 uninterrupted and 2 interrupted ridges; somite 5 with 2 uninterrupted; somite 6 with 2 medially interrupted ridges, posteromedian margin slightly convex. 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 2 spines; well-developed distodorsal and distolateral spines, distodorsal larger; distomesial spine obsolescent. Ultimate article with a few short fine setae not in tuft on distodorsal margin.

Antenna: Article 1 with distomesial spine not reaching distal margin of article 2. Article 2 with 2 welldeveloped distal spines, distolateral spine slightly longer than distomesial and exceeding midlength of article 3. Articles 3 and 4 unarmed.

Mxp 3: Ischium with well-developed spine on flexor distal margin; extensor margin ending in acute angle; crista dentata with 18–20 denticles. Merus shorter than ischium; flexor margin with 2 strong subequal spines; extensor margin with 2 small spines. Carpus unarmed.

P 1: 2.8 times carapace length, covered with finely setiferous scales, with scattered long non-plumose setae. Merus 1.1 times length of carapace, 1.6 times as long as carpus, with spines arranged in longitudinal rows, dorsomesial spines stronger; other distal spines also prominent. Carpus 0.7 length of palm, 1.6 times as long as broad; dorsal surface with some small spines; mesial margin with 4 or 5 strong spines. Palm 1.7 times longer than broad; some small spines arranged in dorsolateral and dorsomesial rows, both rows continuing along fixed and movable fingers, respectively; some small spines scattered on dorsal side. Fingers 0.6 length of palm, each finger distally with 2 rows of teeth, spooned.

P 2–4: moderately slender, with setose striae and numerous long, non-plumose setae. P 2 1.7 times carapace length. Meri successively shorter posteriorly (P 3 merus 0.8 length of P 2 merus, P 4 merus 0.8 length of P 3 merus); P 2 merus 0.7 of carapace length, 3.9 times as long as broad, 1.5 times longer than P 2 propodus; P 3 merus 2.9 times longer than broad, 1.2 times longer than P 3 propodus; P 4 merus 2.8 times as long as broad, 1.2 length of P 4 propodus; extensor margins each with row of 8–10 proximally diminishing spines in P 2 –3, 6 spines in P 4; ventral margins distally ending in strong spine followed proximally by several tubercles or transverse ridges; lateral sides unarmed. Carpi each with 4 spines on extensor margin in P 2, 0–1 spines in P 3–4; lateral surfaces each with 3 or 4 small spines or acute granules sub-paralleling extensor margin in P 2–4; flexor distal margins ending in acute angle. P 2–4 propodi 4.0– 4.4 times as long as broad; extensor margins unarmed; flexor margins each with 6 or 7 slender movable spines on P 2–4. Dactyli distally ending in noticeably curved strong spine, 0.6–0.7 times as long as propodi; flexor margins each with 5 or 6 proximally diminishing teeth, terminal one prominent.

Epipods on P 1, sometimes on P 2.

Remarks. The new species resembles G. punctata  n. sp. from the Philippines to New Caledonia and G. h i s p i d a Baba, 2005 from Indonesia (see Remarks of G. punctata  n. sp.).

Distribucion. New Caledonia, Chesterfield Islands, 44– 88 m.