39–0.47 in) in length and 0.36 mm (0.01 in) in width. Males have a copulatory bursa , which consists of spine-like spicules positioned on three muscular...

containing broad-headed land planarians with simple copulatory organs, without accessory ducts or copulatory bursa, and with a fold of tissue separating the male...

females are often longer and stouter. Males also have a prominent copulatory bursa posteriorly. N. americanus is generally smaller than A. duodenale,...

in the depths of the buccal capsule. Males are 8–11 mm long with a copulatory bursa at the posterior end. Females are 10–13 mm long, with the vulva located...

Tail of adult male of A. cantonensis, showing copulatory bursa and long spicules (arrows), scale bar is 85 μm...

(3⁄8–13⁄16 in) long, and displays the distinct feature of a well-developed copulatory bursa, containing an asymmetrical dorsal lobe and a Y-shaped dorsal ray....

characterized by a reduced buccal capsule and square head, and well-developed copulatory bursa in the male. The genital cone ventrally bears two small slender papillae...

leading to a fully developed gastrointestinal tract. Males have a small copulatory bursa at the posterior. Females have a "barber pole" shape down the middle...

distinguished from females based on the presence of a prominent posterior copulatory bursa. N. americanus is very similar in morphology to A. duodenale. N. americanus...

two broad lateral lobes and a smaller dorsal lobe with rays on the copulatory bursa. These bursal rays' aids in distinguishing the different species of...