Nedorchynchotalona chiangi Kotov & Sinev, 2011

Kotov, Alexey A., Jeong, Hyun Gi & Lee, Wonchoel, 2012, Cladocera (Crustacea: Branchiopoda) of the south-east of the Korean Peninsula, with twenty new records for Korea *, Zootaxa 3368, pp. 50-90 : 83-84

publication ID	https://doi.org/ 10.5281/zenodo.214313
DOI	https://doi.org/10.5281/zenodo.5680449
persistent identifier	https://treatment.plazi.org/id/03B687AA-FF96-5A61-25DC-9D17FCD0FF32
treatment provided by	Plazi
scientific name	Nedorchynchotalona chiangi Kotov & Sinev, 2011
status

Treatment

20. Nedorchynchotalona chiangi Kotov & Sinev, 2011 View in CoL

Figs 26–27 View FIGURE 26 View FIGURE 27

Synonymy. Rhynchotalona falcata (Sars) in Chiang & Du 1979, p. 231, Fig. 159A–B. Nedorchynchotalona chiangi Kotov & Sinev, 2011 , p. 281–283, Figs 5–6 View FIGURE 5 View FIGURE 6 .

Type locality. "River Amur near the mouth of Zeya River in region of Blagoveshchensk town" (Kotov & Sinev 2011), Amur Area, Russia.

Locality in Korea. 6a (see Fig. 1 and Table 1 View TABLE 1 ).

Parthenogenetic female. Body low, posterior margin regularly curved from tip of rostrum to rounded posterodorsal angle lacking any denticles, posterior margin convex, postero-ventral angle broadly rounded ( Fig. 26 View FIGURE 26 A–B, 27D). Body moderately compressed laterally ( Fig. 27 View FIGURE 27 E). Head with regularly curved, elongated rostrum (three times longer than antenna I), ocellus and compound eye of similar size ( Fig. 26 View FIGURE 26 C). Head shield without any dorsal head pores ( Fig. 27 View FIGURE 27 E). Labral keel relatively small, with regularly curved or slightly undulated anterior margin and rounded apex ( Fig. 26 View FIGURE 26 C–D, 27F). Valves with 35–40 setae, first 7–9 setae very long, posterior setae slightly submarginal, with short setules between them; a row of delicate setules located far from posterior margin on inner face of valve ( Fig. 26 View FIGURE 26 E); strong striation in dorsal portion of valves. Postabdomen regularly widened in distal portion, ventral margin straight, preanal margin 1.5 times longer than anal one, slightly undulated; preanal angle well-expressed; anal margin concave; postanal angle expressed; postanal margin convex, dorso-distal angle broadly rounded, distal margin ill-expressed or absent ( Fig. 26 View FIGURE 26 F–G, 27G). On distal portion, 6–8 clustered postanal teeth and about 7–8 groups of long lateral setules, groups of short setules on anal margin. Postabdominal claw long, slightly curved, length of a single basal spine of 0.2 claw length, 1–2 minute spinules at its base. Antenna I short, with antennular sensory seta approximately in middle, three clusters on setules on antenna I anterior face, terminally, nine terminal aesthetascs, among them two larger than the rest ( Fig. 27 View FIGURE 27 A). Antenna II short, with two short sensory setae in coxal portion, basal segment with a short spine distally ( Fig. 27 View FIGURE 27 B, H). Antennal formula: setae 0-0-3/0-1-3, spines 1-0-1/0-0-1; a spine on proximal segment of exopod 1.5 times longer of second segment; apical spines longer apical segments. Five limbs as described by Kotov & Sinev (2011). Limb I with ODL supplied with a single long seta; IDL with two strong setae and a very short seta ( Fig. 27 View FIGURE 27 C). Size in our material 0.30–0.47 mm.

Notes. The species was known from several localities in Far East of Russia and China. It is probably endemic of the Far East. This is the first record of the genus for Korea.