This combination never existed. Gerlach (1963) synonymised Catanema with Eubostrichus but Hopper & Cefalu (1973) later refuted this when first describing Catanema porosum. Catanema is still considered a valid genus by Tchesunov 2013
marine
Hopper, B. E.; Cefalu, C. R. (1973). Free-Living Marine Nematodes from Biscayne Bay, Florida V. Stilbonematinae: Contributions to the Taxonomy and Morphology of the Genus Eubostrichus Greeff and Related Genera. <em>Transactions of the American Microscopical Society.</em> 92(4): 578-591.[details]
Nemys eds. (2025). Nemys: World Database of Nematodes. Catanema porosum Hopper & Cefalu, 1973. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1296230 on 2025-03-21
original descriptionHopper, B. E.; Cefalu, C. R. (1973). Free-Living Marine Nematodes from Biscayne Bay, Florida V. Stilbonematinae: Contributions to the Taxonomy and Morphology of the Genus Eubostrichus Greeff and Related Genera. <em>Transactions of the American Microscopical Society.</em> 92(4): 578-591.[details]