Rhynchonema Cobb, 1920

Genus Rhynchonema Cobb, 1920 View in CoL

Diagnosis. ( Mota et al. 2025): Xyalidae . Cuticle coarsely striated, vacuoles may be present. Amphideal fovea placed over or very close to the end of pharyngostome. Its shape is circular or oval and an amphideal plate may be present (amphideal plate was used to characterize the cuticle annules without division which accommodates the entire amphideal fovea). In some species, amphideal fovea of the males is different to that of the females (oval x circular). The buccal cavity is long and tubular, divided in two parts: cheilostome, short anterior chamber at the level of cephalic setae; pharyngostome, a narrow tubular part extending along the cervical region. Males with two testes. Spicules can be symmetrical or asymmetrical. Gubernaculum is present in most species and normally with apophysis. Precloacal supplements present or absent, when present, they are papilliform (not always easy to see). Females with reproductive system monodelphic prodelphic to the left of intestine. Tail conical.

Type species: Rhynchonema cinctum Cobb, 1920 View in CoL .