error in Gerlach & Riemann, 1974 p 586: Oncholaimus brachycercus sensu Steiner, 1916 is not transferred to Pontonema , but to Paroncholaimus by De Coninck & Schuurmans Stekhoven, see p 51 (instead of p 151).
However, the genus Paroncholaimus is later synonymized with Pontonema.
De Coninck, L. A.; Schuurmans stekhoven, J. H. (1933). The freeliving marine nemas of the Belgian Coast. II With general remarks on the structure and the system of nemas. Mém. Mus. r. Hist. nat. Belg. 58: 3-163. (look up in IMIS)