Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Diaptomoidea ( Superfamille )
        Pseudodiaptomidae ( Famille )
            Pseudodiaptomus ( Genre )
Pseudodiaptomus malayalus  Wellershaus, 1969   (F,M)
Syn.: Pseudodiaptomus binghami malayalus Wellershaus, 1969 (p.262, figs.F, M); Pillai, 1976 (1980) (p.251, figs.F,M); Madhupratap & Haridas, 1986 (p.105, tab.2); Ramaiah & Nair, 1997 (tab.1); Achuthankutty & al., 1998 (p.1, Table 2, seasonal abundance vs monsoon); Madhu & al., 2007 (p.54, Table 4, abundance vs monsoon)
Ref.:
Ranga Reddy & Radhakrishna, 1982 (p.261: Rem.); Santu K.S. & al., 2017 (p.3, figs.F, M, Rem.: genetic analysis)
Espèce Pseudodiaptomus malayalus - Planche 1 de figures morphologiquesIssued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1969, 11 (2). [p.260, Fig.27-30]. As Pseudodiaptomus binghami malayus subsp.
Female (from (Cochin Backwater, India): 29, habitus (lateral; with detail of thoracic segment 5 edge); 30, P5.
Nota:
- Ratio cephalothorax : urosome = 1.5.
- Proportions of the abdominal segments 32, 18, 22, 11; right caudal ramus 17 (20 %). Caudal ramus length 17, breadth 7 (The different lengths of the caudal rami may be an artefact: Length: breadth = 2.5 right; 2.4 left).

Male:
- 27, habitus (lateral; with detail of thoracic segment 5 edge); 28, P5.
Nota: Proportions of the urosomal segments 13, 18, 19, 21, 11; right and left caudal rami = 18 %.
- Caudal ramus length : breadth = 2,7.

Rem: The present form differs from P. binghami Sewell by different aspects: The female P5 has one terminal spine less, and the proportions of the spines are different; the female caudal rami proportions are slightly different; the female abdomen bears another pattern of spinulation dorsally; Tthe thoracic segment 5 bears some spinules ventro-laterally in both sexes; the male P5 differs in having an additional projection on the long projection of the left basipod 2, and there is a long broad spine on exopod segments 2-3.
Scale : single line = 0.1 mm ; double line = 0.05 mm.


Espèce Pseudodiaptomus malayalus - Planche 2 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.4, Figs. 2, 3].
Female (from 9°40'-10°12'N, 76°10'-76°30'E); fig.3, habirus (right lateral view); fig.4, urosome (dorsal view).

Nota:
- Prosome : urosome ratio 61 : 39.
- Prosome 1.26 times longer as broad (1.9 : 1.5).
) Head imperfectly fused with 1st pediger segment, 4thj and 5th thoracic segments also imperfectly fused.
- Rostrum with 2 filaments, these shorter than the 1st segment of A1.
- Posterolateral corners of prosome rounded with small dorsal spine on each side above urosome insertion and, below this, vertical row of about 10 small spinules.
- Urosme 4-segmented; proportional lengths of urosomites plus caudal rami 36 : 14 : 21 : 12 : 17 = 100.
- Genital segment prijecting symmetrically with somewhat long tuft of fine hairs on ventral side and containing receptaculum seminis; some bears pair of egg sacs.
- Urosomite 1 interrupted in the middle by 9 large spinules, 8 spinules on either side.
- Posterior margin of urosomite 2 incomplete laterally, with 16 large, coarse teeth mid-dorsally, these diminishing in size ventrolaterally.
- Urosomite 3 complete with 16-18 more or less transverse rows of coarse teeth mid-dorsally, their size lessening laterally.
- Urosomite 4 furnished with spinules posterolaterally and scattered ornamentation anterolaterally, but barren mid-dorsally.
- Caudal rami symmetrical, divergent and slightly over 1.6 times as long as broad (1.8 : 1.1); dorsal side of each ramus with 2 pairs of irregularly arranged cluster of spinules (abour 11-16 coarse spinules each); inner matgons kairy; each caudal ramus except outer seta 1 with 5 strong unjoined, dagger-shaped setae, outer seta 3 being strongest (dilated and spearhead-shaped), folloxed by outer seta 2; in addition 1 small sensory bristhe lying between outer seta 4 and 5; length-wodth ratio of caudal ramus and length ratio of setae (counted from outside) in Table 1
- A1 21-segmented, reaching almost to posterior margin of genital segment; incomplete articulation separating segments 6 and 7;
- Mouth parts alike for all pseudodiaptomid species.
- Armature formula of P1-P4 in Table 2.


Espèce Pseudodiaptomus malayalus - Planche 3 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.5, Fig.4].
Female: P5 (dorsal view).
Scale bar in mm.

Nota:
- Left and right legs identical, uniramous, 4-segmented; basis slightly broader than coxa, without ledge on inner margin and with a few spinules on distal outer region; exopodal segment 1 cylindrical and longer than the basis and coxa bearing 1 strong, internally serrate spine at distal outer angle; 2 short, blunt, spinous processes, each with a hyaline lobe, at its proximal and distal internal angles; a row of a few spinules on distal external margin just behind above mentioned serrate spine; exopodal segment 2 bearing 4 strong, serrate spines, of which 3 short and remaining one longer than the combined length of basis and exopodal segment 1.


Espèce Pseudodiaptomus malayalus - Planche 4 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.4, Table 1].
Female: The length-width proportions of the caudal ramus and setae of P. malayus


Espèce Pseudodiaptomus malayalus - Planche 5 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.4, Table 2].
Female: Armature formula of the swimming legs P1 to P4 of P. malayus..


Espèce Pseudodiaptomus malayalus - Planche 6 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.5, Figs. 6, 7].
Male: fig.6, habitus (left lateral view); 7, urosome (lateral view).

Nota:
- Prosome : urosome ratio 61 ; 39.
- Prosome 1.8 times longer than wide (1.7 : 0.9).
- Pedigerous segment 5 bearing spine similar to that in female; spines scattered and fewer in number.
- Proportional lengths of urosomal segments and caudal rami 11 : 22 : 21 ; 21 ; 8 : 17 : 100.
- Urosomal segment 1 with few spines only on dorsal posterior margin;
- Urosomal segments, 2, 3 and 4 armed with spines on posterior margin.
- Caudal rami devoid of spines; setae less strong and more normal than those of female.


Espèce Pseudodiaptomus malayalus - Planche 7 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.6, Fig.8].
Male: P5 (dorsal view).
Scale bar in mm.

Nota:
- Basis of left P5 with long projection on inner side, this bearing another small projection on its side; spine on left exopodal segments 2-3 much longer than in female


Espèce Pseudodiaptomus malayalus - Planche 8 de figures morphologiquesIssued from : K.S. Santu, S. Bijoy Nandan, R.I. Cleetus & M. Harikrishnan in Mitochondrial DNA Part A, 2017. [p.8, Table 3].
Morphological characteristics of female specimen of P. malayalus with previous record of P. malayalus and P. binghami. (specimen from Nambur canal, Andhra Pradesh, India).


Espèce Pseudodiaptomus malayalus - Planche 9 de figures morphologiquesIssued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1969, 11 (2). [p.262]. As Pseudodiaptomus binghami malayalus.
Female (from Cochin Backwater): Propotions of the abdominal segments and caudal and caudal setae


Espèce Pseudodiaptomus malayalus - Planche 10 de figures morphologiquesIssued from : S. Wellershaus in Veröff. Inst. Meeresforsch. Bremerh., 1969, 11 (2). [p.262]. As Pseudodiaptomus binghami malayalus.
Male (from Cochin Backwater): Proportions of the abdominal segments

NZ: 1

Carte de distribution de Pseudodiaptomus malayalus par zones géographiques
Loc:
India, Cochin Backwater, Vembanad estuarine system, Bombay, Kerala, Goa
N: 8
Lg.:
(1005) F: 1,25-1,30; M: 1,08-1,11; (1211) F: 1-1,27; M: 1,02-1,1; {F: 1,25-1,30; M: 1,02-1,11}
Rem.: limnique, estuaire.
Incomplete data.
Voir aussi les remarques en anglais
Dernière mise à jour : 18/12/2017

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