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Calanoida ( Order ) |
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Diaptomoidea ( Superfamily ) |
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Pontellidae ( Family ) |
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Labidocera ( Genus ) |
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Labidocera kuwaitiana Prusova & Al-Yamani, 2014 (F,M) | |
| | | | | | | Ref.: | | | Prusova & Al-Yamani, 2014 (p.1151, Descr. F, M, figs.F, M, Rem.) |  Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1152, Fig.1]. Female (29°19'N, 48°09'59''F): A-B, habitus (dorsal and lateral, respectively); C, urosome (dorsal); D, same (ventral); E, same (left lateral); F, genital double-somite (dorsal). Arrows indicate the dorsally extended process on the genital double-somite. A-E: holotype; F: patatype. Scale bars = 0.1 mm. Nota : Prosome about 4.5 times as long as urosome. - Cephalosome and 1st pedigerous somite separate, 4th and 5th pedigerous somites fused. - Posterior corners of prosome with acute triangular processes, symmetrical in dorsal view, directed posteriorly and extending to posterior end of genital double-somite. - Cehalosome without lateral hooks, with small median crest and a pair of dorsal eye lenses, lenses spherical, small and situated apart. - Rostrum 2-pointed, with points widely spaced, with a widened base incorporating a lens, gap between rostral points is about the length of point itself. - Urosome 3-segmented. - Genital double-somite wider than long, asymmetrical, with dorsally extended robust process arising from dorsal surface on the right (arrowed in fig.1 A, B, C, E) ; genital pores dorsal, situated at the process’s base. - Caudal rami strongly asymmetrical : left ramus partly fused to anal somite with proximal half swollen laterally, right ramus separated from anal somite. Left ramus with seta II naked and directed anteriorly, setaeIII-VII plumose and directed posteriorly, setae IV and V slightly expanded in their proximal part ; right ramus with seta I rudimentary and naked, setae II-VII plumose and directed posteriorly, setae IV and V with no proximal thickening. - A1 symmetrical, reaching to mid-length of urosome, 23-segmented.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1153, Fig.2]. Female: A, right A1 (lateral view); B, right A1 articulated segments 1-6 (ancestral segments I-X); C, forehead with rostrum (ventral); D, forehead (right lateral). Scale bars = 0.1 mm. A-D: holotype. Nota : A1 posterior margin of segments 2-12 (ancestral segments II-XVI) fringed with fine hairs ; ancestral segmentsII-IV completely fused and VII-IX incompletely fused. Armature as follows: segment I with 3 setae + 1 aesthetasc ; segments II-IV with 4 setae + 1 aesthetasc, segment V with 2 setae + 1 aesthetascsegment VI with 2 setae ; segments VII-IX with 6 setae + 2 aesthetascs.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1154, Fig.3]. Female: A, A2; B, Md (gnathobase); C, Md (palp); D, Mx1. Scale bar = 0.1 mm. A-D: holotype. Nota : A2 coxa with 1 plumose seta ; basis and 1st endopodal segment fused, with 4 setae ; 2nd endopodal segment bilobed with 9 and 7 setae on proximal and distal lobes, respectively, distal lobe armed with row of spinules ; exopod incompletely 7-segmented, with 1, 4, 2, 1, 1 and 3 setae. - Md gnathobase with 5 teeth and 1 dorsal seta, 3rd and 4th (counted from ventral) teeth bicuspidate, base of 3rd, 4th and 5th teeth with row of small spinules ; mandibular palp with 4 setae on basis ; endopod 2-segmented with 4 and 8 setae, respectively ; exopod 5-segmented with 1, 1, 1, 1 and 2 setae. - Mx1 : praecoxal arthrite with 16 spines ; coxal endite with 3 setae and coxal epipodite with 9 setae ; basis with 4 setae on proximal endite and 3 setae on deistal endite fused to endopod and with fine long hairs on proximal part of distal endite, exite with 1 seta ; endopod with 4 lateral and 5 apical setae ; exopod with 11 setae.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1156, Fig.4]. Female: A, Mx2; B, Mxp. Scale bar = 0.1 mm. A-B: holotype. Nota : Mx2 with long, strong and spinous setae : 1st praecoxal endite with 6 setae , 2nd praecoxal endite with 3 setae ; endopod 4-segmented with 1, 2, 2, and 2 setae. - Mxp relatively small : praecoxa and coxa fused bearing long spinulose setae, setal formula 0, 2, 3, 3 ; basis fringed with row of small teeth on inner margoin, bearing 2 small setae distally ; endopod 4-segmented, 1st segment with 2 proximal and 2 distal setae, 2nd, 3rd and 4th segments with 1, 1 and 3 setae, respectively.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1157, Fig.5]. Female: A-D, P1 to P4, respectively (anterior); E, basis of P4 (posterior). Scale bar = 0.1 mm. A-E: holotype.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1158, Table 1]. Female & Male: Segmentation and armature of the swimming legs P1 to P4.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1159, Fig.6]. Female P5: A, B, holotype; C, D, paratype; A, C, anterior; B, D, posterior. Scale bar = 0.1 mm. Nota : P5 : coxae and intercoxal sclerite completely fused, left and right bases of approximally equal in size, with 1 plumose seta each ; left basis with small distal projection on posterior side ; endopods rudimentary, spiniform, symmetrical ; exopods 1-segmented, asymmetrical, of unequal length and shape. Right exopod 1.7-1.8 times as long as the left one, ornamented with a short row of tiny setules along its inner edge submedially, terminating in 2 relatively large unequal divergent pointed processes and 1 minute sub-apical inner process ; left exopod terminates in 2 small pointed processes, with 1 short distal outer spine.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1160, Fig.7]. Male: A-B, habitus (dorsal and lateral, respectively); C, urosome (dorsal); D, forehead with rostrum (lateral); E, same (ventral). Scale bars = 0.1 mm. A-E: allotype. Nota: Prosome about 4 times as long as urosome. - Cephalosome and 1st pedigerous somite separate, 4th and 5th fused. - Posterior corners of prosome with sharp triangular processes, symmetrical in dorsal view, slightly divergent, extending to posterior end of 1st urosomal somite. - Cephalosome without lateral hooks, with small median crest and a pair of dorsal spherical lenses. - Rostrum 2-pointed, with points widely spaced, with a widened base incorporating a lens, gap between rostral poins is about the length of point itself. - Urosome of 5 somites, symmetrical. - Genital somite slightly swollen laterally, genital opening on the left. - Caudal rami symmetrical, each ramus with 6 plumose setae and 1 rudimentary naked seta, thickening of basal part of setae is not present.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1161, Fig.8]. Male right A1: A, allotype (whole antennule); B, paratype, articulated segments 9-12 (ancestral segments XIX-XXIV). Scale bars = 0.1 mm. Nota: Left A1 non geniculated, reaching to mid-length of urosome, with segmentation and setal formula as in female, posterior margin of segments 2-13 fringed with fine hairs. - Right A1 prehensile, slightly shorter than the left one, indistinctly 15-segmented, hairs along posterior margin lacking, segments V-IX incompletely fused. Fusion pattern and setal formula, segment I: 3 setae + 1 aesthethac; segments II-IV: 4 setae + 1 aesthetasc; segments V-IX: 10 setae + 3 aesthetascs; segments X-XI: 4 setae + 1 aesthetasc; segments XII-XIV: 6 setae + 2 aesthetascs; segments XV-XVI: 4 setae + 2 aesthetascs; segment XVII: 2 setae + 1 aesthetasc; segment XVIII: 2 setae + 1 aesthetasc; segment XIX: 1 seta + 1 aesthetasc + hooked ridge; segment XX: 1 seta + 1 aesthetasc + hooked ridge; segments XXI-XXIII: 2 setae + 1 aesthetasc + serrated ridge; segment XXIV: 1 seta + 1 seta + hooked ridge; segment XXV: 1 seta + 1 seta + 1 aesthetasc; segment XXVI: 1 seta + 1 seta; segments XXVII-XXVIII: 4 setae + 1 aesthetasc. - Segment XIX with anterior hooked process proximally, segment XX with enlarged toothed process at the proximal anterior margin exyending anterior of segment XIX and reaching its proximal anterior hooked process, compound segments XXI-XXIII with enlarged toothed process at the diatal anterior margin extending to distal 1/7 of segment XXIV, segment XXIV with lamelliform process.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1162, Fig.9]. Male P5: A, leg with chela closed (posterior); B, right exopod (1st and 2nd segments only, 3rd segment lacking), anterior; C, right exopod, with 3rd segment present (anterior); D, leg with chela open (posterior); E, right exopod (anterior); F, left exopod 2nd segment. Scale bars = 0.1 mm.A, B: allotype; C: paratype 1; D-F: paratype 2. Nota: P5 asymmetrical, highly modified. Right leg with coxa completely separated from intercoxal sclerite, basis with proximal outer seta, exopod 3-segmented with two first segments forming a chela which is ovoid when closed; 1st exopodal segment large and orbicular, with stout proximal ''thumb'' bearing 1 seta, with striate bilobed roundish process proximally and 1 short curved seta distally on lateral margin facing opposing segment; 2nd segment boot-like with 1 medial spine and small conical sub-distal process on lateral margin facing opposing segment, and 1 medio-distal curved seta; 3rd segment narrow and elongated, nearly 7 times as long as wide, bearing 2 setae and 1 small spine apically. Left leg coxa coalesced into intercoxal sclerite; basis and endopod fused, bearing proximal outer seta and ending in laciniate and inwardly twisted appendage; exopod 2-segmented with 1st segment being 2.4-2.5 times as long as the second one and bearing 1 small distal outer spine, 2nd segment with 1 small sub-distal spine, 3 apical unequal spinous processes, and hirsute inner border.
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 Issued from : I. Prusova & F. Al-Yamani in Crustaceana, 2014, 87 (10). [p.1164, Fig.10]. Position and size of eye lenses in Labidocera kuwaitiana: A-C, males (dorsal view); D, female (dorsal view). See: http://booksandjournals.brillonline.com/content/journals/15685403. Nota: Eye lenses were usually small and widely spaced in females and varying in size from small to large and more closely spaced in males; The eye-lens' diameter in females ranged within fairly narrow limits, from 41 to 55 µm (mean ± SD = 46 ± 3µm, n = 19), while the male eye-lens' diameter varied within a wide range from 47 to 109 µm (mean ± SD = 83 ± 24 µm, n = 28). There are no correlation between eye-lens' diameter and total body lenth in the examined females and males. The distance between lens' centres in females ranged from 152 to 206 µm (mean ± SD = 177 ± 13 µm, n = 19), while in males the range was 98-127 µm (mean ± SD = 111 ± 10 µm, n = 28).
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Distribution map of Labidocera kuwaitiana by geographical zones
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| | | | | | | Loc: | | | Arabian Gulf (Kuwait coastal waters)
Type locality: 29°19' N, 48°09'59'' E. (temperature: 28.78°C, salinity: 42.33 p.1000) | | | | N: | 1 | | | | Lg.: | | | (1184) F: 2,41-2,66; M: 2,27-2,83; {F: 2,41-2,66; M: 2,27-2,83} | | | | Rem.: | For Prusova & Al-Yamani (2014, p.1163) this species belongs ''darwinii'' species group. The species shows resemblance to L. acutifrons. L. kuwaitiana differs from the other species of the 'darwinii' group in having a dorsal process (arrowed in fig. 1A, B, C, E) at the genital double-somite in the female (none of the other females of the 'darwinii' group) and having enlarged toothed process of segments XXI-XXIII in the prehensile antennule in the male (in L. kuwaitiana, toothed process of segments XXI-XXIII in the prehensile antennule extends to distal 1/7 of segment XXIV, whereas in all the other 'darwinii' group members this process is substantially shorter).
Diagnosis for L. kuwaitiana in the 'darwinii' species group after Prusova & Al-Yamani (2014, p.1165) :
Females:
- 1: Urosome of 3 somites.
- 2: Genital somite asymmetrical, caudal rami of approximately equal length.
- 3: Caudal rami asymmetrical, partly fiused to anal somite.
- 4: Genital somite with dorsal triangle process extending dorsally, genital pore dorsal; right P5 exopod with 3 terminal points, left P5 exopod with 2 nearly equal apical processes and 1 small sub-distal outer spine.- 1: Urosome of 5 somites.
- 2: Prosome posterior corners symmetrical.
- 3: Left P5 endopod, if fully extended, extends beyond distal border of exopodal segment 1, and terminates in thin elongate appendix laciniate at its apex; right A1 segment's XXI-XXIII toothed process extends to distal 1/7 of segment XXIV. | | | Last update : 12/11/2015 | |
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 Any use of this site for a publication will be mentioned with the following reference :
Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed April 25, 2024] © copyright 2005-2024 Sorbonne University, CNRS
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