Eurytemora caspica sp. nov. from the Caspian Sea – one more new species within the E. affinis complex (Copepoda: Calanoida: Temoridae)

N.M. Sukhikh and V.R. Alekseev

Proceedings of the Zoological Institute RAS, 2013, 317(1): 85–100 · https://doi.org/10.31610/trudyzin/2013.317.1.85

Full text

Abstract

Eurytemora caspica sp. nov. (Crustacea: Temoridae) from the North part of the Caspian Sea and the delta of the Volga River is described. The new species belongs to the Asian clade of the Eurytemora affinis complex. This species is intermediate morphologically between the North-American and European species of the E. affinis- complex. E. caspica sp. nov. differs from nearest congeners by the shape of the mandible, absence of the seta segmentation on the caudal rami and on swimming legs, the shape of the genital double-somite and by the armament of the thoracic legs. E. caspica sp. nov. is possibly widely distributed along the North part of the Caspian Sea, as well as in the lower reaches of rivers flowing into this sea. The Japan fresh lakes are probably inhabited by undescribed species, very close morphologically to E. caspica sp. nov.

Key words

the Caspian Sea, copepod diversity, sibling species, taxonomy

Submitted September 11, 2012 · Accepted February 19, 2013 · Published March 29, 2013

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