Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Pontellidae ( Family )
            Pontella ( Genus )
Pontella diagonalis  C.B. Wilson, 1950   (F,M)
Syn.: Pontella spinipes (part.) : Wolfenden, 1905 (1906) (p.1020, Rem.F, no M); Dalal & Goswami, 2001 (p.22, fig.2)
Ref.:
C.B. Wilson, 1950 (p.292, Descr.F, figs.F); Silas & Pillai, 1973 (1976) (p.824, Descr.M, figs.F,M); Pillai, 1975 (p.131, figs.F,M, Rem.); Bradford-Grieve & al., 1999 (p.885, 960, figs.F); Mulyadi, 2000 (p.185, figs.M, Rem.M); Mulyadi, 2002 (p.92, figs.M, Rem.); Phukham, 2008 (p.87, figs.F,M); Mulyadi, 2011 (p.1515, figs.F,M)
Species Pontella diagonalis - Plate 1 of morphological figuresIssued from : Mulyadi in The Raffles Bull. Zool., 2000, 48 (2). [p.186, Fig.4].
Male (from Jakarta Bay): a, habitus (dorsal); b, 5th metasomal somite and urosome (dorsal); c, left caudal ramus (dorsal); d, rostrum (anterior view); e, right A1; f, P5.


Species Pontella diagonalis - Plate 2 of morphological figuresissued from : E.G. Silas & P.P. Pillai in J. mar. biol. Ass. India, 1973 (1976), 15 (2). [p.824, Fig.22, c-d].
Female from Indian Ocean): c, urosome.

Male: d, right A1.
Scale as in Calanopia minor.


Species Pontella diagonalis - Plate 3 of morphological figuresissued from : E.G. Silas & P.P. Pillai in J. mar. biol. Ass. India, 1973 (1976), 15 (2). [p.823, Fig.21, e-h, l-m].
Female (from Indian Ocean): e, habitus (dorsal); f, P5, m, forehead (lateral).

Male: g, habitus (dorsal); h, P5; l, forehead (lateral).
Scale as in Calanopia minor.


Species Pontella diagonalis - Plate 4 of morphological figuresissued from :C.B. Wilson in Bull. U.S. natn Mus., 100, 14 (4). [Pl.28, Figs.410-413].
Female (from 5°51'N, 120°46'30''E): 410, habitus (dorsal); 411, forehead (lateral); 412, posterior prosome and urosome (left lateral); 413, P5.


Species Pontella diagonalis - Plate 5 of morphological figuresissued from : Mulyadi in Treubia, 2002, 32; [p.93, Fig.30].
Male (from Jakarta Bay): a, habitus (dorsal); b, metasomam somite 5 and urosome (dorsal); c, left caudal ramus (dorsal); d, rostrum (anterior view); e, right A1; f, P5.


Species Pontella diagonalis - Plate 6 of morphological figuresissued from : N. Phukham in Species diversity of calanoid copepods in Thai waters, Andaman Sea (Master of Science, Univ. Bangkok). 2008. [p.169, Fig.43].
Female (from W Malay Peninsula): a, habitus (dorsal); b, urosome (dorsal); c, P5.

Male: d, habitus (dorsal); e, A1; f, right P5; g, left P5.

Body length after the drawings: F = 3.882 mm; M = 3.500 mm.


Species Pontella diagonalis - Plate 7 of morphological figuresissued from : P.P. Pillai in J. mar. biol. Ass. India, 1975, 17 (2). [p.132, Fig.1, d-i].
Female (from Indian Ocean): d, urosome (dorsal); e, cephalon (lateral); g, P5.

Male: f, cephalon (lateral); h, right A1; i, P5.

Scale bar : 0.3 mm.


Species Pontella diagonalis - Plate 8 of morphological figuresIssued from : Mulyadi in Crustaceana, 2011, 84 (12-13). [p.1516, Fig.2];
Female (from Jakarta Bay): a, habitus (dorsal); b, metasomal segment 5 and urosome (dorsal); c, urosome (ventral); d, metasomal segment 5 and urosome (lateral); e, forehead (lateral); f, rostrum (anterior view); g, P5 (posterior view).


Species Pontella diagonalis - Plate 9 of morphological figuresIssued from : Mulyadi in Crustaceana, 2011, 84 (12-13). [p.1517, Fig.3];
Male (from Jakarta Bay): a, habitus (dorsal); b, metasomal segment 5 and urosome (dorsal); c, left caudal ramus (dorsal); d, rostrum (anterior view); e, dight A1; f, P5.


Species Pontella diagonalis - Plate 10 of morphological figuresIssued from : J.M. Bradford-Grieve, E.L. Markhaseva, C.E.F. Rocha & B. Abiahy in South Atlantic Zooplankton, edit. D. Boltovskoy. 1999, Vol. 2, Copepoda; [p.1070, Fig. 7.391: Pontella diagonalis]. Ur = urosome; R = rostrum.
Female characters (from key, p.959):
- Genital segment with 2 rounded lobes on left side, posterior most of which is broad and covers much of left caudal ramus; ; right side with rounded lobe and posterolateral projection which is broad in lateral view.
- Genital segment is not covered in irregular ridges but has specific processes; left corner of urosome does not extend to posterior border of genital segment.
- Caudal rami unequal, enlarged on right side.
- Urosome of 2 somites.

Compl. Ref.:
De Decker & Mombeck, 1964 (p.13); Carter, 1977 (1978) (p.36); Madhupratap & Haridas, 1986 (p.105, tab.1); Pillai H.U.K. & al., 2011 (p.239, Table 3, vertical distribution);
NZ: 2

Distribution map of Pontella diagonalis by geographical zones
Species Pontella diagonalis - Distribution map 2issued from : P. Pillai in J. mar. biol. Ass. India, 1975, 17 (2). [p.140, Fig.5].
Occurrence of Pontella diagonalis and Pontella securifer collected from 54 stations in the Indian Ocean (See in: Hand Book to the International Zooplankton Collections, volume I, 1969).
Loc:
South Africa (E), Indian, Laccadive Is., Maldive Is., Bay of Bengal, Andaman Sea, Barren Island, W Malay Peninsula, Java (Jakarta Bay), S Philippines (off Jolo)

Type locality: off Jolo (Philippines).
N: 16
Lg.:
(137) F: 4; (256) F: 4,8-4,23; M: 4,15-3,94; (900) M: 3,95; (1087) M: 3,9; (1115) F: 4,24-4,94; M: 3,42-3,84; (1126) F: 4,05-4,10; M: 3,90-3,95; {F: 4,00-4,94; M: 3,50-4,15}
Rem.: epipelagic. Neritic.
For Mulyadi (2000, p.186) the present male specimen agrees with the description of the species by C.B. Wilson (1950) but slight differences were noted in having the proximal outer seta of left caudal ramus with a spur-like spine, and in the form of P5.
For Mulyadi (2011) the species is too diverse to be considered as a member of an Indo-West Pacific Pontella species group.
Last update : 08/12/2020
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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 March 29, 2024]

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