Species Card of Copepod
Cyclopoida ( Order )
    Oithonidae ( Family )
        Limnoithona ( Genus )
Limnoithona tetraspina  Zhang & Li, 1976   (F,M)
Ref.:
Boxshall & Halsey, 2004 (p. 611)
Species Limnoithona tetraspina - Plate 1 of morphological figuresIssued from : G. Zhang & Z. Li in Acta Zoologica Sinica, 1976, 22 (4). [p.403, Figs.1-10].
Female (from mouth of Yangtse): 1, habitus (dorsal); 2, rostrum (lateral); 3, P1; 4, P2; 5, P3; 6, P4; 7, P5.

Male: 8, habitus (dorsal); 9, A1; 10, P5 and genital segment.

Nota Female: Caudal rami 6 times as long as broad.
P1 to P4 with exopods and endopods 3-segmented.
P5 2-segmented, basal segment fused with 5th thoracic segment, distal segment bearing 2 spines on outer border, a long seta at distal end and small spine at the distal portion of the inner border.

Nota Male: Grasping A1 14-segmented.
P5 similar to that of the female in general ap^pearance.
P6 bearing 2 setae of unequal lengths.


Species Limnoithona tetraspina - Plate 2 of morphological figuresIssued from : G. Zhang & Z. Li in Acta Zoologica Sinica, 1976, 22 (4). [p.405]. Characters compared between L. tetraspina and L. sinensis.

Compl. Ref.:
Dussart & Defaye, 1985 (p.10); Ohtsuka & al., 2008 (p.115, Table 5); Cordell & al., 1997 (p.2, invasive species, % change 1980-1997); Bollens & al., 2012 (p.101, fig.2, Table 1, species competition)
NZ: 3

Distribution map of Limnoithona tetraspina by geographical zones
Loc:
China (brackish), mouth of Yangtze River, East China Sea, San Francisco and Columbia River estuaries
N: 4
Lg.:
(1173) F: 0,48-0,44; M: 0,40-0,44; [F: 0,48-0,44; M: 0,40-0,44]
Rem.: Incomplete data.
According to Cordell & al., 2008 (p.753) the 1st records of this species in San Francisco estuary and Columbia River are 1993 for the former and 2003 for the latter.

Diagnosis after Boxshall & Halsey (2004, p.611):
P5 2-segmented, with 4 spines/setae on free exopodal segment.
Last update : 15/02/2015
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Razouls C., de Bovée F., Kouwenberg J. et Desreumaux N., 2005-2015. - Diversity and Geographic Distribution of Marine Planktonic Copepods. Available at http://copepodes.obs-banyuls.fr/en 
[Accessed May 28, 2015]

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