Serial transverse sections of the cephalic region of paratype F2470 at 4.0, 2.6, 2.0, 1.6, 1.3, and 1.0 mm from anterior extremity, respectively. Encircled region in F is enlarged in the inset. A–E at the same magnification as F.

  Part of: Araujo APG, Carbayo F (2018) A new species of the land planarian Issoca sheds light on the polyphyletic status of the genus (Platyhelminthes, Tricladida, Geoplaninae). ZooKeys 752: 1-15.