Figure 1. Capillaria cairina n. sp. (A) Anterior extremity, muscular esophagus (e), and nerve ring (nr). Scale bar = 10 µm; (B) Detail of the male’s anterior extremity, prominent lips surrounded by 12 papillae, apical view (reconstructed from an SEM micrograph). Scale bar = 2 µm; (C) End of stichocytes (s), esophageal glands (eg), and pre-equatorial region where the vulva and vulvar appendix are located (*). Scale bar = 10 µm; (D) Eggs. Scale bar = 40 µm; (E) Female posterior extremity, lateral view, anal opening (arrowhead); the uterus (u) and intestine (i) are shown. Scale bar = 50 µm; (F) Region where the base of the spicule is observed (arrow). Scale bar = 10 µm; (G) Posterior extremity of male, lateral view, spicule (s), spinous spicular sheath (ss), and rounded tip of the spicule (arrow). Scale bar = 10 µm. H. Posterior extremity of male showing papilla (p). Scale bar = 5 µm.