Fiche d'espèce de Copépode
Calanoida ( Ordre )
    Epacteriscoidea ( Superfamille )
        Ridgewayiidae ( Famille )
            Ridgewayia ( Genre )
Ridgewayia sp.  Yeatman, 1969   (M)
Yeatman, 1969 (p.8, figs.M); Humes & Smith, 1974 (p.130)
Espèce Ridgewayia sp. - Planche 1 de figures morphologiquesissued from : H.C. Yeatman in J. Tenessessee Acad. Sci., 1969, 44 (1). [p.10, Pl.II, Figs.21-27].
Male (St. George's Harbor, Bermuda): 21, caudal ramus (some setae broken off); 22, left A1; 23, right A1; 24, P2; 25, distal two segments of endopod of P3; 26, P4; 27, P5 (anterior view).
Nota: Left A1 25-segmented; right 22-segmentedP5 very unusual, some parts being like R. gracilis Wilson and others being somewhat like R. canalis Gurney. Right and left proximal basal segments fused together; no outer seta was noted on the right distal basal segment (but one may have been present and broken off); right exopod 2-segmented, first segment with outer, serrate spine and fine, inner seta and 2nd segment tapering distally and armed with one well-develped serrate spine.

Espèce Ridgewayia sp. - Planche 2 de figures morphologiquesissued from : Figueroa in J. Crustacean Biol., 2011, 31 (1). [p.158, Fig.3, H-I]. As Ridgewayia typica after Por (1979), from Bitter Lakes (Suez Canal). Probably as Ridgewayia sp.
Male: H, right P5; I, left P5.
Nota: The P5 are remarkably similar to that of R. tortuga. The segmentation and armature of the left P5 are the same, except for the presence of a small outer seta on the basis of Yeatman's specimen. This seta is absent in Por's drawing and in R. tortuga. The left endopod has the same oblong shape with a distal tooth-like element in all three. The right P5 in R. tortuga and yeatman's and Por's specimens also have the same segmentation and armature, except for a thin seta present on the inner margin of the 1st exopod segment as shown on Yeatman's drawing; in R. totuga and Por's specimen there is a patch of fine setae on this inner margin. The right endopod has the same elongated shape with a forked tip at the end in all three males. Yeatman described a set of fine seta-like structures on this forked tip, not present in R. tortuga or in Por's drawing. Yeatman's and Por's specimens are depicted as having an unequally bifurcated tip, while R. tortuga has a symatrically bifurcated tip.
Yeatman's specimen and R. tortuga, both have a 25-segmented left A1. But Yeatman's specimen has a 22-segmented right A1, while R. totuga has only 20 segments. The unusual geniculation on the right A1 of R. tortuga between articulated segments 9 and 10 (with 11 segments beyond the geniculation) is not mentioned by Yeatman (1969) nor has it been observed in any other species of Ridgewayia But such articulation has been found elsewhere in Ridgewayiidae by Suarez-Morales and Iliffe (2007)
The swimming legs in both have the same segmentation and armature that include only 7 setae on the terminal exopod segment of P2 instead of the 8 found in all other Ridgewayia.

NZ: 1

Carte de distribution de Ridgewayia sp. par zones géographiques
NW Atlant.: Bermuda Is. (St. George's Harbor)
N: 1
no data
Rem.: See also: Ridgewayia tortuga and R. typica male from Por (1979).
Dernière mise à jour : 30/01/2015

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Razouls C., Desreumaux N., Kouwenberg J. et de Bovée F., 2005-2021. - Biodiversité des Copépodes planctoniques marins (morphologie, répartition géographique et données biologiques). Sorbonne Université, CNRS. Disponible sur [Accédé le 24 juillet 2021]

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