Stephos angulatus - Species Card - Marine Planktonic Copepods

Species Card of Copepod

Calanoida ( Order )	details
Clausocalanoidea ( Superfamily )	details
Stephidae ( Family )	details
Stephos ( Genus )	details	List species for this Genus

Stephos angulatus Bradford-Grieve, 1999 (F,M)

Abbreviations or symbols

Ref.:

(

List of the studied authors )

Bradford-Grieve, 1999 a (p.20, figs.F,M); S.Y. Moon & al., 2015 (p.31: Rem.)

Species Stephos angulatus - Plate 1 of morphological figures

issued from : J.M. Bradford-Grieve in N.Z. Jl mar. freshw. Res., 1999, 33. [p.21, Fig.5].
Female: A, habitus (dorsal); B, idem (lateral left side); C, urosome (dorsal); D, idem (lateral left side); E, genital double-somite (ventral); F, A1; G, P5 (posterior view).

Nota: A1 24-segmented

Species Stephos angulatus - Plate 2 of morphological figures

issued from : J.M. Bradford-Grieve in N.Z. Jl mar. freshw. Res., 1999, 33. [p.24, Fig.8].
Male: A, habitus (dorsal); B, idem (dorso-lateral right side); C, urosome (dorsal); D, idem (lateral right side); E, A1 (segments 7-10); F, P5 (L = left; R = right).

Nota: Left P5 segment 4 unswollen (compare to S. hastatus left P5; cf.p.25, Table 1).

Species Stephos angulatus - Plate 3 of morphological figures

issued from : J.M. Bradford-Grieve in N.Z. Jl mar. freshw. Res., 1999, 33. [p.22, Fig.6].
Female: A, A2; B, Md; C, Mx1; D, Mx2; E, Mxp.

Nota: A2 coxa and basis partly fused.
- Mx1 praecoxal arthrite with 9 terminal spines and 4 posterior surface setae; coxal endite and basal endites 1 and 2 with 3, 4, 5 setae respectively; basis and endopod fused, endopod with 4 + 13 setae; exopod with 11 setae; coxal epipodite with 9 setae; basal exite without seta.
- Mx2 endites 1-6 with 4, 3, 3, 3, 4 and 1 setae, respectively; endopod with 5 setae.
- Mxp syncoxal endites with groups of 1, 2, 3, and 3 (one of them thick) setae from proximal to distal; basis fused with endopod segment 1, with 3 inner setae, 2 distal setae and a group of long, inner edge spinules; free endopod segments 1-5 with 4, 4, 3, 3+1, 3+1 plumose setae respectively.

Species Stephos angulatus - Plate 4 of morphological figures

issued from : J.M. Bradford-Grieve in N.Z. Jl mar. freshw. Res., 1999, 33. [p.23, Fig.7].
Female: A, P1 (anterior); B-D, P2 to P4 (posterior).

NZ:

Distribution map of Stephos angulatus by geographical zones

Loc:

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Geographical glossary )

New Zealand (Wellington Harbour: Evans Bay)

Lg.:

(

References of the authors concerning dimensions )

(774) F: 0,87-0,78; M: 0,8-0,7; {F: 0,78-0,87; M: 0,70-0,80}

Rem.:

In 12 m of water in Evans Bay.
According to bradford-Grieve (1999 a, p.23) there is a small amount of variation in the numbers of spinules on the female genital double-somite, the surfaces of the swimming legs, and the caudal rami. For the author (p.25) this species belongs to type IV (see Genus Stephos). The female of S. angulatus may be distinguished from all other described Stephos by the conspicuous inner distal expansion on theP5 basis.

Last update : 22/01/2016


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