نبذة مختصرة : Admirandus capibaribei sp. n. (Figures 1–4, Table 1) Material studied. Holotype: male (slide MOUFPE.NEM-1) Paratypes: 2 paratype males (one male in slide MOUFPE.NEM-7 and one male in slide MOUFPE.NEM-8) and 6 paratype females (one female in slide MOUFPE.NEM-2, one female in slide MOUFPE.NEM-3, two females in slide MOUFPE.NEM-4, one female in slide MOUFPE.NEM-5 and one female in slide MOUFPE.NEM-6). The specimen in the slide MOUFPE.NEM-2 is the female paratype represented in the images (Figures 2 and 4). Etymology: The species epithet is related to the sampling location, i.e., the estuary of the Capibaribe River. The name Capibaribe originates from the Tupi language and means “in the water of the capybara or ‘wild pigs’”, through the junction of the terms from the Tupi language kapibara (capybara), y (water) and pe (in). Description Males (Figures 1 and 3): Body cylindrical, tapering slightly anteriorly to a conical-cylindrical tail. Cuticle smooth. Six small inner labial papillae, six outer labial, and four cephalic setae. Horseshoe-shaped marginal lamellae (in lateral view) at level of cephalic setae. Stoma rectangular in shape, length to width ratio 2.4–2.8. Three onchia in buccal cavity: largest right, subventral, with a row of denticules, dorsal and left ventrosublateral onchia smaller and equal in size. Amphidial fovea pocket-like with slit-like aperture 3.0–3.5 times body diameter. Pharynx cylindrical, surrounding buccal cavity anteriorly, wider at base, but not forming bulb. Nerve ring covering approximately 50% of pharyngeal length. Cardia large, triangular in shape. Secretory-excretory pore opening anterior to nerve ring, with ventral gland located posterior to cardia. Reproductive system diorchic, with opposed and extended testes, at right side of intestine. Spicules short, slightly curved, arc length 0.9–1.1 of anal body diameter. Gubernaculum without apophysis. Cloaca surrounded by circle of short setae. Tail 2.6–3.3 diameter of anal body, conical-cylindrical in shape, with cylindrical part ratio of ...
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