Lockenloia sanguinis n. gen., n. sp. (Nematoda: Dracunculoidea) from the heart of a nurse shark, Ginglymostoma cirratum, in Florida

Lockenloia sanguinis n. gen., n. sp. (Nematoda: Dracunculoidea) is described from fragments collected in the atrium of the heart of a male nurse shark, Ginglymostoma cirratum (Bonnaterre). The new genus is distinguished by its reduced buccal capsule; body that expands abruptly just behind the cephalic extremity; long and undivided esophagus; and subconical, pointed tail. Until the systematics of the superfamily are revised, the familial placement of the taxon is unclear.