Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Clausocalanoidea ( Superfamille )
        Scolecitrichidae ( Famille )
            Amallothrix ( Genre )
Amallothrix pseudoarcuata  (Park, 1970)   (F)
Syn.: Amallothrix arcuata : Sewell, 1947 (p.155, figs.F);
Scolecithricella arcuata: Tanaka, 1962 (p.76, figs.F,M);
Scolecithricella pseudoarcuata Park, 1970 (p.476, 511, Descr.F, figs.F); Roe, 1972 (p.277, tabl.1, tabl.2); Kovalev & Shmeleva, 1982 (p.84); Vives, 1982 (p.292); Lozano Soldevilla & al., 1988 (p.59); Suarez-Morales & Gasca, 1998 a (p.111); Hernandez-Trujillo & Esqueda-Escargera, 2002 (in Appendix)
Ref.:
Bradford, 1973 (p.143); Bradford & al., 1983 (p.78, Rem.); Vyshkvartzeva, 1999 (2000) (p.235); Vives & Shmeleva, 2007 (p.702, figs.F,M, Rem.); Vives & Shmeleva, 2007 (p.738, figs.F, Rem.)
Espèce Amallothrix pseudoarcuata - Planche 1 de figures morphologiquesissued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., 1962, X (1). [p.77, Fig.145]. As Scolecithricella arcuata.
Female (from Sagami and Suruga Bay): a, habitus (dorsal); b, forehead (left lateral side); c, last thoracic segment and urosome (left lateral side); d, rostrum (dorsal view); e, P1; f, P2; g, P3, h, P5.

Male (from Sagami Bay): i, forehead (left lateral side); j, last thoracic segment and urosome (left lateral side); k, right P5; l, exopod and endopod of left P5.

Nota Female:
- Cephalothorax about 3.55 times the abdomen length.
- Head and 1st thoracic segment fused, 4th and 5th pedigers incompletely fused, line of fusion observed from the dorsal.
- Posterolateral corners of the last thoracic segment rounded, but slightly produced on posterior margin.
- Caudal rami as long as wide.
- Abdominal segments and caudal rami in the proportional lengths 40 : 20 : 17 : 8 : 15 = 100.
- Abdominal segments 1-3 fringed with fine teeth on distal margin.
- A1 23-segmented on left side, extend to the end of the 3rd abdominal segment.
- A2 exopod 1.3 times as long as endopod.
- Mx1 with 9 setae on the outer lobe; 9 setae on exopod; 8 setae on endopod; 5 setae on the 2nd basal segment; 4 setae on the 3rd inner lobe; 2 setae on the 2nd lobe.
- Mx2 and Mxp as those of Scolecithricella propinqua Sars (1920c) = Amallothrix propinqua (Sars, 1925) = Scolecithrix propinqua (Sars, 1924).
- P1 with an outer edge spine on the 1st exopodal segment.
- P2 with the outer edge spine on the 1st exopodal segment, long and curved, furnished with minute teeth on the inner margin. Terminal spine of exopod with 27 teeth.
- P3 with the outer edge spine of the 1st as in P2.Terminal spine of exopod with 22 teeth.Basis furnished with 2 rows of spinules on the anterior distal border.
- P4 with an short and straight inner marginal seta on the basis; terminal spine of exopod with about 51 teeth.
- P5 2-segmented; terminal segment with a strong inner marginal spine on the distal 1/3 of the inner margin; spine furnished with 2 rows of denticles along anterior margin. Terminal spine about 1/3 the length of the inner marginal spine , and finely serrated on the anterior margin. Outer marginal spine short, and arises somewhat obliquely to the inner marginal spine.

Nota Male:
- Cephalothorax about 2.34 times the length of abdomen.
- Forehead slightly produced.
- Posterolateral corners of the last thoracic segment rounded, slightly produced on the ventro-lateral margin.
- Rostrum as in female.
- Urosome 5-segmented; abdominal segments and caudal rami in the proportional lengths 12 : 33 : 20 : 21 : 4 : 10 = 100.
- Caudal rami a little longer than wide.
- A1 19-segmented on the right, extends to the middle of the 2nd abdominal segment.
- P2 with the outer edge spine of the 1st exopodal segment long and curved and furnished with fine teeth along the inner margin.
- P3 with a long outer edge spine on the 1st exopodal segment, but the spine devoid of fine teeth on the inner margin.
- P5 reaches back to the middle of the 4th abdominal segment. Endopod on right leg moderately long. Exopod of the left leg longer than endopod; the inner margin of the 1st endopodal segment produced triangularly at the proximal 1/3 of the segment.


Espèce Amallothrix pseudoarcuata - Planche 2 de figures morphologiquesIssued from : T. S. Park in Bull. Mar. Sc., 1970, 20 (2). [p.510, Figs.175-183]. As Scolecithricella pseudoarcuata.
Female: 175, habitus (dorsal); 176, idem (lateral right side); 177, posterior part of metasome (lateral right side); 178, rostrum (frontal view); 179, A2; 180, Md; 181, Mx1; 182, Mx2 (distal part); 183, Mxp.
Nota: Basis of Md with a long and a minute seta. Mx1: 1st to 3rd inner lobes with 12, 2, and 4 setae, respectively; basis with 5 setae; endopod with 3+5 setae; exopod and outer lobe each with 9 setae.


Espèce Amallothrix pseudoarcuata - Planche 3 de figures morphologiquesIssued from : T. S. Park in Bull. Mar. Sc., 1970, 20 (2). [p.512, Figs.184-187]. As Scolecithricella pseudoarcuata.
Female: 184, P1 (anterior); 185, P2 (posterior); 186, P3 (posterior); 187, P5.


Espèce Amallothrix pseudoarcuata - Planche 4 de figures morphologiquesissued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., 1962, X (1). [p.76]. As Scolecithricella arcuata.
Female: Proportional lengths of segments A1 on the left side.

Nota:

- A1 23-segmented on the left side; 22-segmented on the right side.


Espèce Amallothrix pseudoarcuata - Planche 5 de figures morphologiquesissued from : O. Tanaka in Publ. Seto Mar. Biol. Lab., 1962, X (1). [p.78]. As Scolecithricella arcuata.
Male: Proportional lengths of segments A1 on the right side.
Nota: A1 19-segmented on the right side; 1st segment furnished with a transverse row of hairs on the distal border. Proximal segments each provided with well-developed aesthetascs. Segments 13 and 14 separated.. Segments 14 and 15 make obtuse angle.

NZ: 5

Carte de distribution de Amallothrix pseudoarcuata par zones géographiques
Loc:
G. of Mexico, Canary Is., E Medit., Arabian Sea, Japan
N: 3
Lg.:
(11) F: 2,5; (88) F: 2,44; (117) F: 2,49; (199) F: 2,74-2,66; M: 3,34-3,19; {F: 2,44-2,74}
Rem.: bathypélagique.
Roe (1972) donne les dimensions d'un mâle non décrit pour cette espèce.
?. Amallothrix arcuata: synonymie possible (voir Remarque à Amallothrix arcuata
Voir aussi les remarques en anglais
Dernière mise à jour : 16/03/2017

 Toute utilisation de ce site pour une publication sera mentionnée avec la référence suivante :

Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2019. - Diversité et répartition géographique chez les Copépodes planctoniques marins. Sorbonne Université, CNRS. Disponible sur http://copepodes.obs-banyuls.fr [Accédé le 19 mars 2019]

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