Cucullanus is a genus of parasitic nematodes.Shamsi, S. (2016). Cucullanus Müller, 1777. In: Guilini, K.; Bezerra, T.N.; Deprez, T.; Fonseca, G.; Holovachov, O.; Leduc, D.; Miljutin, D.; Moens, T.; Sharma, J.; Smol, N.; Tchesunov, A.; Mokievsky, V.; Vanaverbeke, J.; Vanreusel, A.; Vincx, M. (2016) NeMys: World Database of Free-Living Marine Nematodes. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=22861 on 2016-09-03 The genus includes more than 100 species.Petter, A. J., & Le Bel, J. (1992). Two new species in the genus Cucullanus (Nematoda-Cucullanidae) from the Australian Region. Memórias do Instituto Oswaldo Cruz, 87, 201-206. PDF
Among the species, Cucullanus cirratus is a parasite of cod. Cucullanus genypteri is a parasite of the pink cusk-eel, Genypterus blacodes.
Two species known as C. pybusae and C. stelmoides were discovered in 1978 inhabiting the liver and intestines of the American brook lamprey.
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