Light micrographs of Fotolaimus cavus sp. nov. A–F, H, J. Holotype (ICHUM 8474); G, K. Paratype (ICHUM 8477); I. Paratype (ICHUM 8475); L. Paratype (ICHUM 8479). A. Anterior region; B. Amphid; C. Buccal cavity with left ventrosublateral tooth; D. Buccal cavity with right ventrosublateral tooth; E. Posterior end of pharynx with cardia; F. Male tail; G. Female tail; H, I. Spicule (black arrowhead) and gubernaculum (white arrowhead); J. Sperms in seminal vesicle; K. Uvette and ductus entericus; L. Terminal pores. Scale bars: 20 μm (A, E, H–K); 10 μm (B–D, L); 100 μm (F, G).

 
 
  Part of: Shimada D, Kakui K, Fujita Y (2023) A new species of free-living marine nematode, Fotolaimus cavus sp. nov. (Nematoda, Oncholaimida, Oncholaimidae), isolated from a submarine anchialine cave in the Ryukyu Islands, southwestern Japan. Zoosystematics and Evolution 99(2): 519-533. https://doi.org/10.3897/zse.99.109097