Scapholeberis kingi Sars, 1888

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 : 58

3. Scapholeberis kingi Sars, 1888

Fig. 5

Synonymy. Scapholeberis kingi Sars, 1888 , p. 68; Chiang & Du, 1979, p. 145–146, Fig. 97; Dumont & Pensaert 1983, p. 24–25, Fig. 2 : 3; Fig. 4 : 4; Fig. VI: 1–2; Pl. 1: 8; Pl. 2: 4; Pl. 3: 5, 7, 9; Pl. 4: 1–7; Pl. 5: 1–2, 4; Fig. 10 : 3; Pl. 6: 6–8; Fig. 12 Fig. 21 : 4; Kotov et al. 2011a, p. 405.

Scapholeberis kingi n.sp. in Sars 1903, p. 8–10, Pl. 1: figs 2a–c.

Scapholeberis rammneri Dumont & Pensaert in Yoon 2010, p. 64–66, Fig. 34.

Type locality. “South Creek and Paramatta, New South Wales, Australia ” ( Dumont & Pensaert 1983).

Localities in Korea. 3, 5, 6a–b, 7a–b, 8, 9, 10, 13, 14 (see Fig. 1 and Table 1 ).

Parthenogenetic female. Brownish in colour. Body with dorsal margin interrupted by a cervical incision, postero-dorsal angle well-expressed, posterion margin slightly convex, postero-ventral angle with a strong spine - mucro, which is of 0.2 of valve length ( Fig. 5 A). Head rather large, lacking a horn, rostrum trilobate in ventral view ( Fig. 5 B), middle lobe with "a hyaline membrane in front" in terminology of Dumont & Pensaert (1983), compound eye very large, occupies distalmost portion of head ( Fig. 5 A). A ridge departs from the insertion of the second antenna and extends to the side of the head—seen frontally, it appear as a pair of shallow depressions, "auricles" in terminology of Dumont & Pensaert (1983). An elongate frontal head pore on the rostrum ( Fig. 5 B, arrow). Valves with reticulations as vertical lines near the posterior margin. A projection on ventral valve margin before the system of setae located on a flat portion, "sucker-plate" in terminology of Dumont & Pensaert (1983). A broad hyaline membrane extends beyond the posterior valve rim ( Fig. 5 –D). Postabdomen slightly widened distally, preanal margin long, preanal angle obtuse, anal margin straight, postanal angle not expressed, postanal margin very short ( Fig. 5 E). About 3–5 single postanal teeth, followed by clusters of spinules proximally (on anal margin), numerous series of minute setules laterally ( Fig. 5 F). In distal dorsal external pecten 2–4 proximalmost denticles specially strong and sparsely located. First antenna short, with antennular sensory seta and 9 terminal aesthetascs ( Fig. 5 G). Antenna II long, antennal formula: setae 0-1-3/1-1-3 ( Fig. 5 H). Limb I as shown in Fig. 5 I. Other limbs not studied. Size in our material 0.5–1.0 mm.

Notes. According to Dumont & Pensaert (1983), this taxon is distributed in Australia, SE Asia, India, Middle East and Africa. It is known from the Far East of Russia ( Kotov et al. 2011b), China ( Chiang & Du 1979) and Japan ( Mizuno & Takahashi 1991), so its presence in Korea was expected. Yoon (2010) described S. mucronata ( O. F. Müller, 1776) and S. rammneri Dumont & Pensaert, 1983 from Korea, but we did not see these species in our samples. Probably this author misidentified S. kingi as S. rammneri . Unfortunately, descriptions and illustrations by Kim (1988), Kim & Yoon (1987) and Yoon (2010) do not allow us to assign their " S. mucronata " to any species, because most taxonomically important characters were not mentioned.

Figures

FIGURE 2. Sida ortiva Korovchinsky, 1979, parthenogenetic female from Seon You Dong, locality 11: A, lateral view; B, head; C, postero-ventral portion of valves; D, postabdomen; E, its distal portion; F, antenna I; G, antenna II. Scale bars: 0.1 mm.

FIGURE 4. Pseudosida cf. szalayi (Daday, 1898), parthenogenetic female from Bak Sil Ji 3, locality 8. A, lateral view; B, head; C, postero-ventral portion of valve, inner view; D, postabdomen; E, its distal portion; F, distal sensory seta of antenna I; G, distal portion of basal segment of antenna II; H, branches of antenna II. Scale bars: 0.1 mm.

FIGURE 5. Scapholeberis kingi Sars, 1888, parthenogenetic female from Bak Sil Ji 1, locality 6 a: A, lateral view; B, head, ventral view; C, postero-ventral valve portion, external view; D, posterior margin, inner view; E, postabdomen and abdomen; F, postabdominal claw; G, antenna I; H, antenna II, posterior view; I, limb I. Scale bars: 0.1 mm.

FIGURE 10. Ilyocryptus spinifer Herrick, 1882, parthenogenetic female from Bak Sil Ji 3. locality 8: A, lateral view; B, head; C, posterior valve margin; D, postabdomen; E, its distal portion; F, antenna II. Scale bars: 0.1 mm.

FIGURE 12. Macrothrix triserialis Brady, 1886, appendages of parthenogenetic female from Bak Sil Ji 1, locality 6 a: A, antenna I; B, antenna II, anterior view; C, setae of endopod proximal segment; D, distal portion of limb I. Scale bars: 0.1 mm.

FIGURE 21. Camptocercus uncinatus Smirnov, 1971, parthenogenetic female from Bak Sil Ji 1, locality 6 a: A, lateral view; B, head; C, labrum; D, armature of postero-ventral valve margin, inner view; E, armature of posterior valve margin, inner view; F, postabdomen; G, postabdominal claw; H, exopod of antenna II; I, distal portion of limb I. Scale bars: 0.1 mm.