Published December 4, 2018 | Version v1
Taxonomic treatment Open

laticaudata P. E. Muller 1867

Description

Ceriodaphnia laticaudata P.E. Müller, 1867

(Figs. 3–4)

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, 4 A–D). Paired latero-dorsal ridges absent (Figs. 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). Egg locule visibly extending laterally (Figs. 3 B–C), without any wrinkles, but with numerous, densely located semicircular projections (Figs. 3 E–H) well-visible also under optical microscope (Fig. 4E); a circular row of minute tubercles on each semicircular projection (Fig. 3G). Space between egg locule and dorsal margin with low, flattened projections (not associated with any air-spaces), bearing minute tubercles (Fig. 3F). Rest of ephippium surface covered by low, densely located flattened domes (Fig. 3H) – external signs of air-spaces which are well-visible under light microscope (Figs. 4 C– F), each dome with a spot of minute tubercles. Ephippium with narrow ventral rim lacking any sculpture (Fig. 3E).

Notes

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

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Additional details

Biodiversity

Scientific name authorship
P. E. Muller
Taxon rank
species
Taxonomic concept label
laticaudata Muller, 1867 sec. Kotov, Ibragimova & Neretina, 2018