Fig. 3. Polacanthoderes martinezi, DIC photomicrographs. A, B, D, E in Taxonomy, genetic diversity, and phylogeny of the Antarctic mud dragon, Polacanthoderes (Kinorhyncha: Echinorhagata: Echinoderidae)

Fig. 3. Polacanthoderes martinezi, DIC photomicrographs. A, B, D, E, the holotypic female (ZMB 11237), head, neck, and segments 1–5, dorsal view (A) and ventral view (B), segments 6–11, dorsal view (D) and ventral view (E); C, the allotype male (ZMB 11238a), neck and segments 1–6, dorsal view; F, paratype male (ZMB 11238d), segments 7–11, ventral view. Black arrows, white arrowheads, and black arrowheads indicate sensory spot, type-1 glandular cell outlet, and type-2 glandular cell outlet, respectively. Abbreviations (ac), acicular spine; LA, lateral accessory; LD, laterodorsal; LV, lateroventral; MD, middorsal; ML, midlateral; pa, papilla; pe, penile spine; (sac), small acicular spine; SD, subdorsal; (tu), tube; VL, ventrolateral; VM, ventromedial. Digits in the abbreviations indicate the corresponding segment number.