Species Card of Copepod
Calanoida ( Order )
    Diaptomoidea ( Superfamily )
        Temoridae ( Family )
            Eurytemora ( Genus )
Eurytemora anadyrensis  Borutzky, 1961   (F,M)
Syn.: Eurytemora gracilis (Sars, 1898)
Borutsky, 1961 (p.16, figs.F,M); Heron & Damkaer, 1976 (p.129, Table 2); Dussart & Defaye, 1983 (p.49); Boruttsky & al?, 1991 (syn. n.)
Species Eurytemora anadyrensis - Plate 1 of morphological figuresIssued from : E.V. Borutsky in Sb. Trud. gos. zool. Mus., 1961, 8. [p.18, Fig.6].
Euytemora anadyrensis: Female: a, last thoracic segment with lateral wings and genital segment (dorsal); e, abdomen (dorsal); s, anal segment and caudal rami; b, last thoracic segment and genital segment (lateral); v, genitral plate; d, P5; .
Male: j, P5.

Nota female:
- Last thoracic segment with well-marked lateral wings, coming off at an angle of 45° to the longitudinal axix of the genital segment; the length of the wings varies, at least their posterior end and reaches to the middle of the length of the genital, segment, usually the wings are longer, each wing upon the end is somewhat curved toward the outside and terminates in a short spinule; additional inner wing is absent, which can be seen quite well from comparison with the drawing of the wing from above and friom the side in E. anadyrensis and E. kurenkovi.
- Genital segment uniformly expanded in the middle, somerimes weakly asymmetrical; with inspection from the side of its upper edge with shallow groove and long abdominal edge just as also with the following segment. genital plate.
- Caudal rami short as the two last segments of the abdomen, their length exceeds the width by 6-7 times; both edges of the rami with hairs, the upper side of the rami and the anal segment without spinules. Apical setae almost 1.5 times the length of the rami.
- Abdomen usually strongly curved downwards.
- A1 extend to the end of the cephalothorax.
- P5 with short angular 2nd basipodal segment; 1st exopodal segment 2 times the length of the previous segment; both appendages of the outer edge displace towards the distal end, that arrising from the edge is directed perpendicularly to the axis of the segment and bears spinules on the posterior edge; the 1st (proximal) edge of the 1st exopodal segment, there arises on the inneredge of the segment a weak generally rounded edge; terminal segment of the exopod of egg-shaped form; its outer appendage is almost the same length as the spines upon the outer edge of the 1st segment, and is 2 half times shorter than the apical seta; between both appendages is a very small spinule. The last segment of the exopod af all swimming legs is very long, by 1 half times surpassing in length both first taken together and bears apical knife-shaped spine. segments

Nota male:
- Genital segment uniformly expanded at the distal end, without appendix on the left.
- Length of the caudal rami equal to the length of the three last segments of the abdomen taken together and is 7-8 times greater than their width, thick hairs cover only the posterior half of the inner edge of the rami, the first half and outer edge with sparse hairs.
- P5 : 2nd right basipodal segment wide, its length is 2 times the greatest width; the inner edge of the segment with two small growths, upon one of which sits a spine. The endopod 2-segmented; 1st relatively narrow, somewhat shorter than the 2nd basipodal segment; at the top of the inner edge, upon a growth, is a strong spine, the outer edge with 2 thin setae; the terminal segment is a sickle-shaped curve and somewhat broader at the base upon the inner edge. The 1st basipodal segment of left P5 with a peculiar construction: its inner edge with a chitinized transparent growth, rounded from above and with a wide rounded protuberance below; upon the middle of the segment from above a strong spine, sitting upon a knob (with other positions of the segment this spine might be found upon the inner edge). The exopodal 1st segment somewhat longer and narrower than the previous segment, with 2 spines upon knobs on the middle of the inner edge and 2 (?) setae upon the outer edge; the 2nd segment is of a characteristic structure for the genus; the structure of its terminal part is shown in the drawing (6x).

NE Siberia (Lake Krasnöya in the basin of the Anadyr River)
N: 2
(628) F: 1,6-1,3; M: 1,4-1,2; {F: 1,30-1,60; M: 1,20-1,40}
Rem.: freshwater.
Incomplete data.
Translation from D.M. Damkaer (1964).
This species, according to the structure of the wings of the last thoracic segment, P5 and caudal rami of the female is near to E. gracilis Sars, but well-differentiated from it by the symmetrical structure of the genital segment of the female and the peculiar structure of the P5 male.
After Heron & Damkaer (1976, Table2) ratio anal somite/uropod (= caudal rami) 2/3; with metasomal wings.
Last update : 30/04/2020
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Razouls C., Desreumaux N., Kouwenberg J. and de Bovée F., 2005-2024. - Biodiversity of Marine Planktonic Copepods (morphology, geographical distribution and biological data). Sorbonne University, CNRS. Available at http://copepodes.obs-banyuls.fr/en [Accessed June 25, 2024]

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