Ferrari F.D.1, Rybnikov P.V.2, Dahms H.-U.3 2007. Redescription of Tegastes nanus Sars, 1904 (Copepoda: Harpacticoida: Tegastidae) from Spitsbergen in the Arctic Ocean // Invertebrate Zoology. Vol.4. No.1: 1–14 [in English].

1 IZ/MSC; MRC-534, National Museum of Natural History, Smithsonian Institution, 4210 Silver Hill Rd., Suitland, MD 20746, U.S.A.

2 P.P. Shirshov Institute of Oceanology RAS, Moscow, Russia (deceased).

3 National Taiwan Ocean University, Institute of Marine Biology, 2 Pei-Ning Road, KEELUNG, Taiwan, 202 (no longer valid).

KEY WORDS: systematics, morphology, phytal, Harpacticoida, Copepoda, Crustacea.

ABSTRACT: Tegastes nanus Sars, 1904 (Copepoda, Harpacticoida, Tegastidae) is reported from Ny Еlesund, Spitsbergen (Svalbеrd) in the Arctic Ocean. The morphology of adult females and males is redescribed. Specimens from Ny Еlesund are similar to Norwegian specimens collected by Sars from Eggesbønes and Еlesund, as well as to published descriptions of specimens of this species by Chislenko (1967) from the White Sea. Specimens from Ny Еlesund, Eggesbønes and Еlesund differ from published description of the species collected in the Gulf of Maine (McAlice & Coffin, 1990) by the shape of the extension of the genital somite plus 6th thoracic somite of females, the spermatophore reservoir of males, and several limbs. This is the first detailed description of the mouthparts of T. nanus and the first report of a harpacticoid copepod from Spitsbergen.

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