Species Card of Copepod
Calanoida ( Order )
    Clausocalanoidea ( Superfamily )
        Scolecitrichidae ( Family )
            Scolecithricella ( Genus )
Scolecithricella vespertina  Tanaka, 1955   (F)
Ref.:
Tanaka, 1955 (p.117, Descr.F, figs.F); Bradford & al., 1983 (p.103); Vyshkvartzeva, 1999 (2000) (p.234)
Species Scolecithricella vespertina - Plate 1 of morphological figuresissued from : O. Tanaka in Rec. oceanogr. Wks Japan, 1955, 2 (1). [p.117, Fig.1].
Female (off N Maizuru): a, habitus (dorsal); b, head (right lateral side); c, last thoracic segment and urosome (right lateral side); d, rostrum (dorsal view).

Nota Female:
- Cephalothorax about 4 times the abdomen length.
- Head and 1st pedigerous segment fused, 4th and 5th pedigers fused.
- Posterolateral corners of the last thoracic segment slightly emarginate.
- Rostrum with 2 fine filaments attached to a wide bifurcated base.
- Abdomen 4-segmented; proportional lengths of segments and caudal rami 40 : 20 : 17 : 6 : 17 = 100.
- Caudal rami 1.5 times as long as wide.
- Genital segment slightly swollen at the middle of the lateral margin in dorsal view; slightly swollen ventrally.
- A1 21-segmented, extends to the posterior margin of last thoracic segment.


Species Scolecithricella vespertina - Plate 2 of morphological figuresissued from : O. Tanaka in Rec. oceanogr. Wks Japan, 1955, 2 (1). [p.117, Fig.2].
Female: a, A2; b, Md; c, Mx1.

- A2 exopod about 1.3 times as long as endopod (37 : 28); 2nd endopodal segment swollen on the outer margin and furnished with hairs on outer margin.
- Md small, but well developed; exopod about 2 times as long as endopod (11 : 6); 3rd exopodal segment longest (8 : 7 : 12 : 3 : 2). Teeth of the cutting edge slender and close up.
- Mx1 small; spinulation on the outer lobe: 6 long and 3 short setae; exopod with 5 setae; endopod with 6 setae; 2nd basal segment with 2 setae; 3rd inner lobe with 2 setae; 2nd inner lobe with 1 seta; 1st inner lobe (= arthrite) with 8 long and 1 short spines.


Species Scolecithricella vespertina - Plate 3 of morphological figuresissued from : O. Tanaka in Rec. oceanogr. Wks Japan, 1955, 2 (1). [p.118, Fig.3].
a, Mx2; b, Mxp; c, P1 (posterior aspect).

- Mx2 with 4 inner lobes (= endites) of which the distal one is the longest, furnished with 1 strong spine, 1 slender one and 1 worm-like sensory filament. Endopod furnished with 9 sensory filaments of which the middle 4 are bud-like (fig.3a).
- Mxp well developed; basal segments of about equal lengths; 1st basal segment with a bud-like sensory filament on the inner margin about the middle of the segment; 4th and 5th segments of endopod with each 1 outer marginal seta.
- P1 exopod 3-segmented, endopod 1-segmented. 1st exopodal segment devoid of outer edge spine; 2nd basal (= basis) segment furnished with 2 groups of minute spinules on posterior surface.


Species Scolecithricella vespertina - Plate 4 of morphological figuresissued from : O. Tanaka in Rec. oceanogr. Wks Japan, 1955, 2 (1). [p.119, Fig.4].
Female: a, P2 (anterior aspect); b, P3 (idem); c, P4 (idem); d, P5.

- P2 exopod 3-segmented, endopod 3-segmented; coxa with small spines on the proximal outer margin and a row of minute spinules on posterior surface about the middle of segment; inner distal margin of basis ptoduced into an acute angle; 1st exopodal segment with the outer edge spine reaching the middle of the 2nd segment of exopodite.; posterior surface of the segment furnished with a longitudinal row of spinules; 2nd exopodal segment with a strong outer edge spine which extends to the middle of the proximal outer edge spine of the 3rd segment.; posterior surface of the segment furnished with 2 rows of spinules; the 3rd exopodal segment with 3 outer marginal spines; terminal spine finely serrated, number of teeth about 40; posterior surface of the 3rd segment furnished with 4 transverse rows of spinules. Endopodite broad; 1st segment pointed at the distal outer edge; 2nd segment with 6 remarkable spines on the anterior surface and a longitudinal row of minute spinules on posterior surface.
- P3 exopod and endopod 3-segmented each; coxa with a row of spines on proximal outer margin; posterior surface furnished with groups of spinules; inner marginal seta short; 2nd and 3rd exopodal segments furnished with rows of minute spinules on posterior surface; 2nd and 3rd endopodal segments each furnished with remarkable spines on anterior surface, and with a longitudinal row of minute spinules on posterior surface.
- P4 similar structure as in P3; outer margin of coxa smooth; inner marginal seta absent; there is on posterior surface a row of strong spines (5 in number) at the distal margin of the segment, and a group of minute spinules about the middle of the segment; the 2nd exopodal segment has a very short outer edge spine and a transversal row of minute spinules on posterior surface; yje 3rd exopodal segment has 3 rows of minute spinules on posterior surface; terminal spine very finely serrated; the 2nd and 3rd endopodal segments each furnished with longitudinal rows of spinules on posterior surface.
- P5 1-segmented; inner margin wjth on the middle of the segment 1 serrated spine which is about half as long as the segment; distam margin of the segment furnished with 1 short spine; the outer margin has 1 small spine on the distal 1/4 of the degment.


Species Scolecithricella vespertina - Plate 5 of morphological figuresissued from : O. Tanaka in Rec. oceanogr. Wks Japan, 1955, 2 (1). [p.118].
Female: Proportional lengths of segments of A1.
Nota: Segments 1-2, 8 to 10 and 24-25 fused.

NZ: 1

Distribution map of Scolecithricella vespertina by geographical zones
Loc:
Sea of Japan (40 miles north of Maizuru)
N: 1
Lg.:
(123) F: 1,09; {F: 1,09}
Rem.: Genus poorly assured. Probable in this genus.
Last update : 22/03/2017
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