Schematic illustration of the male terminalia of representatives of Amphineurus (dorsal view). A A. (A.) patya; B A. (A.) superbus; C A. (A.) pita; D A. (A.) umbraticus. — Abbreviations: ad spur, anterodorsal spur; aed, aedeagus; aed sh, sheath of aedeagus; b spur, basal spur; cgonst, clasper of gonostylus; db clasper, dorsal branch of clasper of gonostylus; db lobe, dorsal branch of lobe of gonostylus; f, foramen of male tergite X; goncx, gonocoxite; la spur, latero-apical spur; lb sh, lateral branch of sheath of aedeagus; lgonst, lobe of gonostylus; lh, lateral humps; mh, medial humps; pb sh, posterior branches of sheath of aedeagus; t9, male tergite IX; t10, male tergite X; vb clasper, ventral branch of clasper of gonostylus; vb lobe, ventral branch of lobe of gonostylus.