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Ceriodaphnia laticaudata

Ceriodaphnia laticaudata

P.E.Muller, 1867

GBIF:154507993

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Descriptions(1)

(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. 3 A, 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. 3 D, 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. 4 E); a circular row of minute tubercles on each semicircular projection (Fig. 3 G). Space between egg locule and dorsal margin with low, flattened projections (not associated with any air-spaces), bearing minute tubercles (Fig. 3 F). Rest of ephippium surface covered by low, densely located flattened domes (Fig. 3 H) – 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. 3 E).
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): 105-123, DOI: 10.11646/zootaxa.4527.1.9

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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.

Imageimage/png© Kotov, Alexey A.;Ibragimova, Aisylu G.;Neretina, Anna N.Kotov, Alexey A.;Ibragimova, Aisylu G.;Neretina, Anna N.

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.

Imageimage/png© Kotov, Alexey A.;Ibragimova, Aisylu G.;Neretina, Anna N.Kotov, Alexey A.;Ibragimova, Aisylu G.;Neretina, Anna N.

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Source Information

Identification of Ceriodaphnia Dana, 1853 (Crustacea: Cladocera) taxa from European Russia based on ephippial morphology

checklist

This dataset contains the digitized treatments in Plazi based on the original journal article 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): 105-123, DOI: 10.11646/zootaxa.4527.1.9

Abstract

Over the last decades significant progress was achieved in the investigations of water fleas (Crustacea: Cladocera). Their morphology, taxonomy and biogeography can be considered as well-studied, but still there are genera almost ignored by taxonomists. The genus Ceriodaphnia Dana, 1853 (Cladocera: Daphniidae) belongs to such problematic groups. From previous publications, it is obvious that different taxa from the genus have a very different morphology of their ephippia. Here, we study ephippium morphology in six common taxa from central-northern European Russia (Ceriodaphnia megops Sars, 1862; C. laticaudata P.E. Müller, 1867; C. rotunda (Straus, 1820) sensu Sars, 1862; C. quadrangula (O.F. Müller, 1785); C. pulchella Sars, 1862; C. reticulata (Jurine, 1820)) using light and scanning electron microscopy. A key to their identification based on ephippium morphology is proposed. This could be the starting point for revisions based on morphological characters with special emphasis on ephippia. Also, we propose that Ceriodaphnia taxa at least from the Holocene subfossil samples could be identified to the species group level according to structure of their ephippia. This approach to identification of Ceriodaphnia remains in sediments could improve palaeoecological reconstructions. However a global revision of the genus is still needed.

Kotov A A, Ibragimova A G, Neretina A N, plazi (2018). Identification of Ceriodaphnia Dana, 1853 (Crustacea: Cladocera) taxa from European Russia based on ephippial morphology. Plazi.org taxonomic treatments database. Checklist dataset https://doi.org/10.11646/zootaxa.4527.1.9 accessed via GBIF.org on 2026-06-14.

CC0Published 12/4/2018View dataset
GBIF Usage Key
154507993
Dataset Key
021796c0-cde1-4dfd-a83a-3b1c83ce466b
Origin
source
Backbone Key
2234866
Taxon ID
38745B7FFFABFF99FF4ECF7DFA7FC44B.taxon
Last Crawled
6/10/2026
Last Interpreted
6/10/2026