Euchirella speciosa - Species Card - Marine Planktonic Copepods

Euchirella speciosa Grice & Hülsemann, 1968 (F)

Taxonomy

Order Calanoida

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Superfamily Clausocalanoidea

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Family Aetideidae

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Genus Euchirella

details list species for this Genus

Abbreviations or symbols

References

List of the studied authors

Grice & Hülsemann, 1968 (p.325, Descr.F, figs.F, tab.2); Tanaka & Omori, 1969 a (p.160, Rem.); Bradford & Jillett, 1980 (p.43, figs.F, fig. 73, distribution chart); Vaupel Klein, 1980 (p.152); 1984 a (p.46, 49, figs.F, Table II: characters, Rem.); Markhaseva, 1996 (p.167, figs.F)

Figures

Plate 1 issued from : J.M. Bradford & J.B. Jillett in Mem. N.Z. oceanogr. Inst., 86, 1980. [p.45, Fig.28].
Female: A, habitus (lateral left side); B, idem (dorsal); C, genital segment (lateral left side); D, idem (lateral right side); E, idem (dorsal); F, basipod 1 of P4.Nota: The south-west Pacific specimens agree more closely with E. speciosa Grice & Hulsemann, 1968 than with E. venusta.

Species Euchirella speciosa - Plate 2 of morphological figures

Plate 2 issued from : J.C. von Vaupel Klein in Crustaceana, Supplt 9, Studies on Copepoda, III, 1984. [p.76, Fig.14, b].
Female: b, exopodite 2 of Mxp (with 3 setae).
Scale bar = 0.2 mm.

Species Euchirella speciosa - Plate 3 of morphological figures

Plate 3 issued from : J.C. von Vaupel Klein in Crustaceana, Supplt 9, Studies on Copepoda, III, 1984. [p.84, Fig.18, a, j, l].
Female: a, number and structure of spines among the lateral margin of exopodal segments 1, 2 and 3 of P1 (left appendage, posteriotr view) (note: 3 unequal spines, the proximal two largely smooth, the distal one minutely pectinate (corresponding to exopodites 1, 2 and 3 respectively); j, stage in fusion of endopodal segments 1-2+3 of P2 (right leg, anterior face, drawn from posterior) (note: fully coalesced condition; l, lateral margin of exopodal segment 2 of P2 (left appendage, posterior view).
Scale bars: p = 0.2 mm for l; q = 0.2 mm for a and j.

Species Euchirella speciosa - Plate 4 of morphological figures

Plate 4 issued from : G.D. Grice & K. Hulsemann in Pacif. Sci., 1968, 22 (3). [p.326, Figs.14-19].
Female (from SE Pacific): 14, habitus (dorsal); 15, anterior end of head (lateral); 16, 4th and 5th thoracic segments (left lateral view); 17, idem (right lateral view); 18, A2; 19, 1st basipodal segment of P4.

Nota: Head and 1st thoracic segment fused, 4th and 5th fused. Head witout crest. Genital segment asymmetrical, in dorsal view right side smooth, left side with 2 small swellings. One-pointed rostrum, directed downward. A1 24-segmented (segments 8 and 9 fused), reaching caudal rami. Endopod of A2 about 1/4 of exopo; outer lobe of terminal segment of endopod with 5, inner lobe with 4 setae. Endopod of P1 1-segmented, exopod 2-segmented with 3 straight external spines. Endopod of P2 1-segmented, exopod 3-segmented. Endopods and exopods of P3 and P4 3-segmented. Posterior surface of 1st basipodal segment of P4 with 2 rather strong, unequal spines.

Species Euchirella speciosa - Plate 5 of morphological figures

Plate 5 issued from : J.C. von Vaupel Klein in Crustaceana, Supplt 9, Studies on Copepoda, III, 1984. [p.69, Fig.9, b].
Female: b, setal armature on the posterior face of the 1st inner lobe of basipodal segment 1 of left Mx1 (3 setae, numbered 1 to 3 in a proximal to distal order to compare other species, here seta 4 absent contrary in E. rostrata).
Scale bar: 0.1 mm.

Plate 6 Euchirella speciosa female:
1 - Genital segment asymmetrical.
2 - Crest absent.
3 - Genital segment with left lateral side swelled (dorsal view).
4 - Coxopodite of P4 with 2 spines.
5 - Endopodal segment 1 of Md without seta.
6 - Endopodal segment 2 of A2 with 5 setae on external lobe and 4 setae on internal lobe.
7 - Genital segment in dorsal view left side with 2 small projections (bilobated).

Species Euchirella speciosa - Plate 7 of morphological figures

Plate 7 issued from : J.C. von Vaupel Klein in Crustaceana, Supplt 9, Studies on Copepoda, III, 1984. [p.68, Fig.8, l].
Euchirella speciosa: Structure and setal complement of endopod 1 of Md (right, posterior). A very minute setal vestige (arrow), as in Euchirella messinensis).

Species Euchirella speciosa - Plate 8 of morphological figures

Plate 8 issued from : J.C. von Vaupel Klein in Crustaceana, Supplt 9, Studies on Copepoda, III, 1984. [p.68, Fig.8, o].
Euchirella speciosa: Accessory setae on endopodite 2 of Md (right appendage in posterior view). No accessory setae, only the regular terminal row of 9 setae present.

Species Euchirella speciosa - Plate 9 of morphological figures

Plate 9 Issued from : J.C. von Vaupel Klein in Crustaceana, (Supplement) 9, 1984. [p.93, Tableau II].
Euchirella speciosa Female: Datamatrix stating observed states of characters from Table I (p.87-90) presently examined; nos. refer to the input nos. used in Table I (see to the family Aetideidae).

Species Euchirella speciosa - Plate 10 of morphological figures

Plate 10 Issued from : J.C. von Vaupel Klein in Crustaceana, (Supplement) 9, 1984. [p.93, Tableau II].
Datamatrix stating observed states of characters from Table I (p.87-90) presently examined; nos. refer to the input nos. used in Table I (see to the family Aetideidae).

Species Euchirella speciosa - Plate 11 of morphological figures

Plate 11 Issued from : J.C. von Vaupel Klein in Crustaceana, (Supplement) 9, 1984. [p.93, Tableau II].
Datamatrix stating observed states of characters from Table I (p.87-90) presently examined; nos. refer to the input nos. used in Table I (see to the family Aetideidae).

Complementary References

List of the studied authors

Lo & al., 2004 (p.89, tab.1)

Distribution

NZ: 3

Distribution map of Euchirella speciosa by geographical zones

Distribution map of Euchirella speciosa for the Zone China Seas, Vietnam

Additional Maps & Charts

Map 3 Issued from : J.M. Bradford & J.B. Jillett in New Zealand Ocean. Inst. Memoir, 86, 1980. [p.88-89, Figs.65-67].
Distribution of several species of Euchirella in the Tasman Sea and around New Zealand.
Nota: Euchirella indica (= Euchirella massinensis indica).

Localisations

Geographical glossary

SE Pacif. (off Juan Fernandez Is.), New Zealand, China Seas (East China Sea), Taiwan (N: Mienhua Canyon).

Type locality: 31°S, 90°W.

Quotations

N: 4

Dimensions (mm)

References of the authors concerning dimensions

(100) F: 4,92; (201) F: 5,1-4,4; (242) F: 4,9; (1257) F: 4,6-5,1; {F: 4,40-5,10}

Remarks

epi-bathypelagic.
This species is very like E. venusta.
For Grice & Hulsemann (1968, p.525) this species closely resembles E. formosa Vervoort, E. indicaVervoort and E. venusta Giesbrecht in the absence of a crest, the number of spines on the 1st basipodal segment of P4, and the number of setae on the lobes of the terminal segment of the endopod of A2.
Lo & al. (2004) seem to have observed this species for the first time in the NW Pacific (Taiwan).
After Vaupel Klein (1984a, p.47) the shape of the genital somite, exhibits a constant and distinct difference with E. venusta in the material examined.

Last update : 22/02/2021

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