laticaudata P.E. Müller, 1867

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, Zootaxa 4527 (1), pp. 105-123 : 106

publication ID	https://doi.org/10.11646/zootaxa.4527.1.9
publication LSID	lsid:zoobank.org:pub:C9D04EAA-61CD-4706-9B54-026C5A7FD98F
DOI	https://doi.org/10.5281/zenodo.5960199
persistent identifier	https://treatment.plazi.org/id/38745B7F-FFAB-FF99-FF4E-CF7DFA7FC44B
treatment provided by	Plazi (2019-03-27 14:50:02, last updated 2023-10-31 01:06:57)
scientific name	laticaudata P.E. Müller, 1867
status

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Ceriodaphnia laticaudata P.E. Müller, 1867

( Figs. 3–4 View FIGURE 3 View FIGURE 4 )

Length about 0.4–0.45 mm, width about 0.66–0.7 of length. In lateral view, ephippium asymmetrical, narrowing posteriorly; dorsal margin straight; ventral margin regularly curved from postero-ventral to anterior margin which is almost perpendicular to dorsal margin ( Figs. 3A, E View FIGURE 3 , 4 View FIGURE 4 A–D). Paired latero-dorsal ridges absent ( Figs. 3 View FIGURE 3 B–C). A depression along dorsum separating two halves of ephippium well-visible; sculpture of dorsal plate as a few wavy longitudinal wrinkles and numerous spots of minute tubercles ( Figs. 3D, F View FIGURE 3 ). Egg locule visibly extending laterally ( Figs. 3 View FIGURE 3 B–C), without any wrinkles, but with numerous, densely located semicircular projections ( Figs. 3 View FIGURE 3 E–H) well-visible also under optical microscope ( Fig. 4E View FIGURE 4 ); a circular row of minute tubercles on each semicircular projection ( Fig. 3G View FIGURE 3 ). Space between egg locule and dorsal margin with low, flattened projections (not associated with any air-spaces), bearing minute tubercles ( Fig. 3F View FIGURE 3 ). Rest of ephippium surface covered by low, densely located flattened domes ( Fig. 3H View FIGURE 3 ) – external signs of air-spaces which are well-visible under light microscope ( Figs. 4 View FIGURE 4 C– F), each dome with a spot of minute tubercles. Ephippium with narrow ventral rim lacking any sculpture ( Fig. 3E View FIGURE 3 ).

Figures

FIGURE 3. Ceriodaphnia laticaudata P.E. Müller, 1867, ephippial female from Cherepovetskoe Reservoir. A, lateral view of female. B, latero-dorsal view of ephippium. C, dorsal view. D, fragment of ephippium dorsal portion, dorsal view. E, ephippium. F, its dorsal portion, lateral view. G, sculpture of its central portion. H, ventral portion of ephippium. Scale bars: 0.1 mm for A–C, E; 0.01 mm for D, F–H.

FIGURE 4. Ceriodaphnia laticaudata P.E. Müller, 1867, ephippial female from Cherepovetskoe Reservoir. A–B, ephippial female with a single egg in ephippium, lateral view. C–D, opened ephippium, egg removed. E–F, its central and ventral portion. Scale bars: 0.1 mm.