Species Card of Copepod
Calanoida ( Order )
    Arietelloidea ( Superfamily )
        Nullosetigeridae ( Family )
            Nullosetigera ( Genus )
Nullosetigera giesbrechti  (A. Scott, 1909)   (F,M)
Syn.: Phyllopus bidentatus : Giesbrecht, 1892 (p.419, figs.F); Giesbrecht & Schmeil, 1898 (part., p.124); Esterly, 1905 (p.191, figs.F);
Phyllopus giesbrechti A. Scott, 1909 (p.149, Descr.F, figs.F); Sewell, 1948 (p.553); C.B. Wilson, 1950 (p.287, Descr.M, figs.F,M); Tanaka, 1964 c (p.237, Rem.); Heinrich, 1990 (p.19); Guangshan & Honglin, 1984 (p.118, tab.)
Ref.:
Soh & al., 1999 (p.1583); Boxshall & Halsey, 2004 (p.150)
Species Nullosetigera giesbrechti - Plate 1 of morphological figuresissued from : A. Scott in Siboga-Expedition, 1909, XIX a. [Plate XLVI, Figs.1-6]. As Phyllopus giesbrechti.
Female (from Banda Sea); 1, habitus (dorsal); 2, forehead (lateral); 3, last thoracic and genital segments (left side); 4, idem (right side); 5, A1; 6, P5.


Species Nullosetigera giesbrechti - Plate 2 of morphological figuresissued from : C.B. Wilson in U.S. National Museum. Bull.100, 14 (4), 1950. [Pl.27, Figs.397-399]. As Phyllopus giesbrechti.
Female (from Philippines): 399, P5.

Male: 397, habitus (dorsal); 398, P5.


Species Nullosetigera giesbrechti - Plate 3 of morphological figuresissued from : C.O. Esterly in Univ. Calif. Publs. Zool., 1905, 2 (4). [p.191, Fig.43]. As Phyllopus bodentatus.
Female (from San Diego Region): a, habitus (lateral); b, P5.


Species Nullosetigera giesbrechti - Plate 4 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf. 18, Fig.26]. As Phyllopus bidentatus.
Female: 26, A1.


Species Nullosetigera giesbrechti - Plate 5 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf.18, Figs.27 -33]. As Phyllopus bidentatus.
Female: 27, Mxp (anterior surface); 28, Md (cutting edge); 29, A2 (anterior surface), 30, P1 (anterior surface); 31, P2 (posterior surface); 32, Mx2 (posterior surface); 33, Mx1 (posterior surface).


Species Nullosetigera giesbrechti - Plate 6 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf.18, Fig. 25]. As Phyllopus bidentatus.
Female: 25, P5 (posterior surface).


Species Nullosetigera giesbrechti - Plate 7 of morphological figuresIssued from : W. Giesbrecht in Systematik und Faunistik der Pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. – Fauna Flora Golf. Neapel, 1892, 19 , Atlas von 54 Tafeln. [Taf.38, Fig. 35]. As Phyllopus bidentatus.
Female: 35, habitus (dorsal).

NZ: 4

Distribution map of Nullosetigera giesbrechti by geographical zones
Loc:
Indonesia-Malatsia, Philippines, Pacif. (W equatorial), California, Pacif. (SE tropical)
N: 5
Lg.:
(5) F: 2,8; (46) F: 2,8; (137) F: 2,8; M: 2,6; {F: 2,80; M: 2,60}
Rem.: For C.B. Wilson (1950, p.288) the females of N. aequalis and N. giesbrechti show similarities enough alike to make their separation difficult, but the males exhibit enough dissimilarity to make their separation imperative. This is an instance where both sexes are necessary to make satisfactory specific identification.
For A. Scott (1909, p.150), this species differs from Phyllopus (= Nullosetigera) bidentatus from Brady (see Giesbrecht, 1892) by the nearly symmetrical prolongations of the last thoracic segment, and by their narrowly rounded apex in lateral view.
After Tanaka (1964 c, p.37), the form described and figured by Giesbrecht under the name P. bidentatus is slightly differs from that described by A. Scott. According to A. Scott, Giesbrecht's specimen is identical with N. giesbrechti taken from the Malay Archipelago.
Last update : 24/01/2015
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2021. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed September 22, 2021]

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