megops Sars 1862
| Autor: | Kotov, Alexey A., Ibragimova, Aisylu G., Neretina, Anna N. |
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| Rok vydání: | 2018 |
| Předmět: | |
| DOI: | 10.5281/zenodo.5960197 |
| Popis: | Ceriodaphnia megops Sars, 1862 (Figs. 1���2) Length about 0.5���0.55 mm, width about 0.7 of length. In lateral view, ephippium almost semicircular, somewhat asymmetrical, stronger narrowing posteriorly; dorsal margin almost straight; ventral margin regularly curved from postero-ventral to antero-ventral angle (Figs. 1A, 2 A���D). Paired latero-dorsal ridges strongly expressed (Figs. 1 B��� D), extend above dorsal margin as seen laterally (Figs. 1A, 2 A���D), their dorsal margin slightly and regularly convex. A distinct depression along dorsum separating two halves of ephippium and, respectively, two halves of dorsal plate; sculpture of dorsal plate consisting of a series of longitudinal wrinkles (Figs. 1 D���E). Sculpture on latero-dorsal ridges low, consisting of small semicircular projections (Figs. 1 D���F); the external signs of roundedhexagonal air-spaces well-visible under light microscope (Fig. 2E). Egg locule smooth, only somewhat extending laterally, with poorly expressed vertical wrinkles (Fig. 1B, F���G); under optical microscope, surface of locule relatively smooth, with small irregularities (Fig. 2E). Rest of ephippium surface covered by low, dense, flattened domes (Figs. 1 G���H); the external signs of air-spaces well-visible under light microscope (Figs. 2D, F). Such air spaces absent in the locule region. Ventral rim of ephippium lacking air spaces, with obscure polygonal reticulation (Figs. 1H, 2F). Published as part of Kotov, Alexey A., Ibragimova, Aisylu G. & Neretina, Anna N., 2018, Identification of Ceriodaphnia Dana, 1853 (Crustacea: Cladocera) taxa from European Russia based on ephippial morphology, pp. 105-123 in Zootaxa 4527 (1) on page 106, DOI: 10.11646/zootaxa.4527.1.9, http://zenodo.org/record/2612039 |
| Databáze: | OpenAIRE |
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