Diacyclops hanguk Karanovic, Grygier & Lee 2013

Figure 18.Diacyclops hanguk sp. n., holotype female: A habitus, dorsal view B habitus, lateral view C antennula, dorsal view D antenna, ventral view. Arabic numerals indicating sensilla and pores presumably homologous to those in Diacyclops ishidai sp. n. Roman numerals indicating pores homologous to those in Diacyclops parasuoensis sp. n. Arrows pointing most prominent specific features. Scale bars 100 μm.

Figure 19.Diacyclops hanguk sp. n., holotype female: A cephalothorax, dorsal view B cephalothoracic shield, lateral view C labrum, anterior view D mandibula, posterior view E mandibula, antero-ventral view F maxillula, posterior view G maxillula, anterior view H maxilla, posterior view I maxilliped, posterior view. Arabic numerals indicating sensilla and pores presumably homologous to those in Diacyclops ishidai sp. n. Greek letters indicating unique pores and sensilla. Arrows pointing most prominent specific features. Scale bars 100 μm.

Figure 20.Diacyclops hanguk sp. n., holotype female: A urosome, ventral view B usorome, lateral view C anal somite and caudal rami, dorsal view. Arabic numerals indicating sensilla and pores presumably homologous to those in Diacyclops ishidai sp. n. Greek letters indicating unique pores and sensilla. Arrows pointing most prominent specific features. Scale bar 100 μm.

Figure 21.Diacyclops hanguk sp. n., A–D holotype female E–H paratype female A first swimming leg, anterior view B second swimming leg, anterior view C third swimming leg, anterior view D fourth swimming leg, anterior view E coxa and basis of antenna, ventral view F second endopodal segment of second swimming leg, anterior view G third endopodal segment of fourth swimming leg, anterior view H sixth leg, lateral view. Arrows pointing most prominent specific features. Scale bar 100 μm.

Figure 22.Diacyclops hanguk sp. n., allotype male: A habitus, dorsal view B last four urosomites and caudal rami, dorsal view C left caudal ramus, ventral view D pleuron of second free prosomite (third pedigerous somite), flattened E rostrum and antennula, flattened, dorsal view F first antennular segment, ventral view G fifth leg, anterior view H sixth leg, ventro-lateral view. Arabic numerals indicating sensilla and pores presumably homologous to those in Diacyclops ishidai sp. n. Roman numerals indicating pores homologous to those in Diacyclops parasuoensis sp. n. Greek letters indicating unique pores and sensilla. Arrows pointing most prominent specific features. Scale bars 100 μm.

Figure 27.Light photograph of four sympatric Korean species of the Diacyclops/Acanthocyclops complex from Seomjin River: A Acanthocyclops sensitivus (Graeter & Chappuis, 1914), two adult females B Diacyclops languidoides s.l. (Lilljeborg, 1901), two adult females C Diacyclops parasuoensis sp. n., two adult females D Diacyclops hanguk sp. n., two adult females.