Chiridiella kuniae - Species Card - Marine Planktonic Copepods

Chiridiella kuniae Deevey, 1974 (F, juv.M)

Taxonomy

Order Calanoida

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Superfamily Clausocalanoidea

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Family Aetideidae

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Genus Chiridiella

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Abbreviations or symbols

Synonymy

Chiridiella brachydactyla : Grice & Hülsemann, 1965 (p.223, 231, figs.F)

References

List of the studied authors

Deevey, 1974 (p.451, Descr. juv.M, figs. juv.M, Rem.); Markhaseva, 1996 (p.97, figs.F)

Figures

Plate 1 issued from : G.D. Grice & K. Hulsemann in J. Zool., 1965, 146. [p.233, Fig.9]. As Chiridiella brachydactyla.
Female: a, habitus (dorsal); b, idem (lateral right side); c, Md (mandibular palp); e, Md (cutting edge); f, Mx1; g, Mx2; ; h, mx2 (another view); i, spine on lobe 4 of Mx2; j, spine on lobe 5 of Mx2; k, Mxp; l, P1; m, P2; n, P3; o, P4; p, details of tooth structure on terminal spine of P4.
The present specimen deviates from the description of C. brachydactyla Sars (1925). Two external spines are present on the exopod of P1 (as in C. subaequalis). The head and 1st thoracic segment are fused. On the external side of the first four lobes of Mx2 arise conspicuous short spinules.

Species Chiridiella kuniae - Plate 2 of morphological figures

Plate 2 issued from : G.B. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.452, Fig.7].
Immature Male (from 32°10'N, 64°30'W): a-b, habitus (dorsal and lateral with A1, respectively); c, A2; d, P5; e, Md (masticatory blade; f, Md (mandibular palp); g, Mx1; h, P1.
Upper scale for parts a and b; lower scale for parts c-h. Scales in mm.

Species Chiridiella kuniae - Plate 3 of morphological figures

Plate 3 issued from : G.B. Deevey in Bull. Mar. Sc., 1974, 24 (2). [p.453, Fig.8].
Immature Male: a, Mxp; b, Mx2 (two distal lobes separated from proximal three).
Scale in mm.

Species Chiridiella kuniae - Plate 4 of morphological figures

Plate 4 Issued from : E.L. in Proc. Zool; Inst. RAN, 1996, 268. [p.97, Fig.72]. After Grice & Hulsemann, 1965.
Female: Mx2

Species Chiridiella kuniae - Plate 5 of morphological figures

Plate 5 Issued from : E.L. in Proc. Zool; Inst. RAN, 1996, 268. [p.98, Fig.73]. After Grice & Hulsemann, 1965.
Female: Mxp.

Species Chiridiella kuniae - Plate 6 of morphological figures

Plate 6 Issued from : E.L. in Proc. Zool; Inst. RAN, 1996, 268. [p.98, Fig.73]. After Grice & Hulsemann, 1965.
Female: P1 (Le = external lobe).

Plate 7 Chiridiella kuniae female:
1 - Mx2 with 5 endites.
2 - Endites not strongly modified in comparison with typical; setation of first-fifth endites are nearly of the same size, without pincers-like spines.
3 - Endopod of P1 with external lobe.

Plate 8 Chiridiella kuniae female ;
1 - Mx2 lobes without spines arranged as pincers.
2 - 4th and 5th lobes of Mx2 with enlarged hooklike spines.
3 - P1 exopod with 2 edge spines.
4 - Fan of thick spinules on lobes 1-4 of Mx2.

Complementary References

List of the studied authors

Deevey & Brooks, 1977 (p.256, tab.2, Station "S")

Distribution

NZ: 2

Distribution map of Chiridiella kuniae by geographical zones

Localisations

Geographical glossary

off Bermuda: Station "S" (32°10'N, 64°30'W), NE Atlantic (station not specified)

Quotations

N: 3

Dimensions (mm)

References of the authors concerning dimensions

(226) F: 4,1; {F: 4,10}

Remarks

bathypelagic. Sargasso Sea: 1000-1500 m (Deevey & Brooks, 1977, station "S");
Grice & Hulsemann (1965, p.231) point to the specimen deviates from the Sars' (1925) description (see Chiridiella brachydactyla.
For Deevey (1974, p.451), Grice & Hulsemann’s female specimen, which they identified as C. barachydactyla differed from Sars in that the head and 1st thoracic segment were fused, there were 2 edge spines on the exopod of P1, and there were differences in the setation of Mx1 and Mx2. The immature male taken by Deevey has 2 edge spines on the exopod of P1, and appears to have Mx1 and Mx2 identical to those of their female ; Md and Mxp are also closely similar or identical. The immature male differs from their specimen in that the head is separate, or at least partially fused with the 1st thoracic segment. P1 and P2 have 1-segmented endopods and exopods, P3 and P4 have 1-segmented endopods and 2-segmented exopods, but this may be in part a juvenile character. Immature males of the other species of Chiridiella taken by Deevey at station off Bermuda have been similar in size to mature females, but that is apparently not the case in this species. The close similarity, except for leg segmentation, of the appendages of this immature male to those figured by Grice & Hulsemann for their 4.1 mm female indicates that the two specimens must belong to the same species.

Last update : 02/09/2021

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