First record of Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905 (Harpacticoida, Copepoda) from a shallow coastal area of Lake Baikal

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Resumo

Female and male specimens of the Palearctic species, Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905, were found in the coastal zone of Lake Baikal, Siberia. This was the first record of the species in Lake Baikal and the Baikal region. A general description and brief morphological characteristics were made using scanning electron microscopy. The authors compared the principal diagnostic morphological traits of C. (C.) microstaphylinus from Lake Baikal and some water bodies from the European part of Russia (within the Syktyvkar City, Republic of Komi). As a result, specimens from Lake Baikal and the Syktyvkar area were shown to be similar in the structure of their thoracic appendages and caudal rami.

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Sobre autores

T. Alekseeva

Limnological Institute, Siberian Branch, Russian Academy of Sciences

Autor responsável pela correspondência
Email: atm171@mail.ru
Rússia, Irkutsk

E. Fefilova

Institute of Biology, Komi Scientific Center, Ural Branch, Russian Academy of Sciences

Email: atm171@mail.ru
Rússia, Syktyvkar

N. Sheveleva

Limnological Institute, Siberian Branch, Russian Academy of Sciences

Email: atm171@mail.ru
Rússia, Irkutsk

O. Timoshkin

Limnological Institute, Siberian Branch, Russian Academy of Sciences

Email: atm171@mail.ru
Rússia, Irkutsk

Bibliografia

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2. Fig. 1. Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905, SEM-photographs of females from Lake Baikal: a - external view, dorsally; b - anal somite and caudal branches, dorsally; c - anal plate; d-f - external-posterior margins of anal somites, dorsally. Scale, µm: a - 300, b - 50, c-e - 20, f - 10

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3. Fig. 2. Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905, drawings of female (a-d) and male (e, f) from Lake Baikal. Baikal: a - double genital somite and spermatophore, ventrally; b - genital field; c - anal somite and caudal branches, dorsally; d - anal somite and caudal branches, ventrally; e - anal somite and caudal branches, dorsally; f - anal somite and caudal branches, ventrally. Scale 100 µm

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4. Fig. 3. Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905, SEM-photographs of males from Lake Baikal: a - anal somite and caudal branches, dorsally; b - caudal branch, ventrally; c - posterior external margin of anal somite, ventrally. Scale, µm: a - 40, b - 30, c - 20

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5. Fig. 4. Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905, drawings of limbs of female (a-c, g) and male (d-f, h, i) from Lake Baikal: a - endopodite P2, b - endopodite P3, c - endopodite P4, d - endopodite P4, e - endopodite P3, f - endopodite P2, g - P5, h - P5, i - P6. Scale 100 µm

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6. Fig. 5. Canthocamptus (Canthocamptus) microstaphylinus Wolf 1905, SEM-photographs of limbs of males from Lake Baikal: a, b - endopodite P3, arrow shows bristles on proximal segment; c, d - endopodite P4; e - P5; f - P6. Scale, µm: a, b, d - 10; c, f - 20; e - 40

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