Cladocera (Crustacea: Branchiopoda) of the south-east of the Korean Peninsula, with twenty new records for Korea * Author Kotov, Alexey A. Author Jeong, Hyun Gi Author Lee, Wonchoel text Zootaxa 2012 3368 50 90 journal article 10.5281/zenodo.214313 f69535e8-6850-402e-992d-09316696daf4 1175-5326 214313 19. Monospilus daedalus Kotov & Sinev, 2011 Fig. 25 Synonymy. Monospilus daedalus Kotov & Sinev, 2011 , p. 276–280, Figs 3–4 . Type locality. "Mouth of the Tom' River” (Kotov & Sinev 2011), Amur Area, Russia . Locality in Korea . 12 (see Fig. 1 and Table 1 ). FIGURE 25. Monospilus daedalus Kotov & Sinev, 2011 , parthenogenetic female from Cheok Ji Ri, locality 12: A, lateral view; B, dorsal view; C, head shield; D, armature of postero-ventral valve margin, inner view; E, seta on postero-ventral angle; F, postabdomen; G, postabdominal claw; H–I, antenna I, lateral and anterior view; J, antenna II; K, distal portion of limb I. Scale bars: 0.1 mm. Parthenogenetic female. Body rounded, very high, moulting incomplete ( Fig. 25 A). As dorsally, body relatively compressed laterally, with lateral projections in anterior half of the valves of first instar ( Fig. 25 B). Sculpture with numerous shallow depressions, more expressed in dorsal portion. Rostrum short, compound eye absent, ocellus large. Head shield with step-like incisions on each side in antero-lateral portion, rostrum wide, with four tubercles; single, relatively small major head pore in posterion portion, lateral pores absent ( Fig. 25 C). Setae on ventral margin of valve short, unilaterally setulated ( Fig. 25 D–E). Postabdomen short, its length 2–2.5 of width. Preanal margin straight; preanal angle distinct, obtuse; anal margin concave, postanal angle obtuse, massive; postanal margin almost straight, almost no projection for postabdominal claw ( Fig. 25 F). On postanal and anal margin, 3–6 strong, single postanal teeth, groups on smaller teeth on anal margin. Laterally, several row of spinules. Postabominal claw massive, with two pectens, in proximal pecten distalmost denticle shorther than the second one. Basal spine long, 3–4 thin setules at its base ( Fig. 25 F–G). Antenna I short, its length 2.5 times of width; antennular sensory seta located somewhat distally to middle, its length subequal to antenna I length; 8 terminal and single lateral easthetascs ( Fig. 25 H–I). Antenna II short, with two sensory setae at coxal portion; basal segment with a short spine distally ( Fig. 25 J). Antennal formula: setae 0-0-3/0-1-3, spines 1-0-1/0-0-1. Spine on proximal segment of exopod very long, more that 1.5 times longer than next segment; spines on apical segments about 1.5 times longer than these segments. Six pairs of limbs as it was described by Kotov & Sinev (2011), ODL with a single seta armed with short setules distally; IDL with two setae of subequal size and a third rudimentary seta. ( Fig. 25 K). Size in our material 0.34 mm. Notes. The species, known from a single locality in the Amur basin (Kotov & Sinev 2011), clearly has a wider range. Illustrations and descriptions of the Chinese and Japanese populations ( Chiang & Du 1979 ; Mizuno & Takahashi 1991 ) are not detailed enough for evaluating their species status. After the description of M. daedalus , all previous identifications of M. dispar Sars, 1862 from the Far East, including Korea ( Yoon & Kim 1987 ; Yoon 2010 ), need to be re-checked.