Revised 11/07/23
Two of the genera of the Heterocheilidae are separated by the prsence of dentigerous ridges on the lips. The genus Multicaecum has such ridges, while the genus Brevimulticaecum does not. (Sprent, 1979).
Masova, S., Moravec, F., Barus, V., Seifertova, M. 2020. Redescription, systematic status and molecular characterisation of Multicaecum heterotis Petter, Vassiliades et Marchand, 1979 (Nematoda: Heterocheilidae), an intestinal parasite of Heterotis niloticus (Osteichthyes: Arapaimidae) in Africa. Folia Parasitologica 57:280-288
Morgovoy, A.A. 1953: [Ascaridata of animals and Man and the Diseases caused by them. Essentials of Nematodology 2.] akademiya Nauk sssr, Moscow, 616 pp. (in Russian)
Skrjabin, K.I., Shikhobalova, N.P., Mozgovoyk.i., A.A. 1951. [Key to Parasitic Nematodes. Vol. ii, Oxyurata and Ascaridata.] Akademiya Nauk SSSR Publishers, Moscow, 631 pp. (in Russian)
Sprent, J.F.A. 1979: Ascaridoid nematodes of amphibians and reptiles: Multicaecum and Brevimulticaecum. J. Helminthol. 53: 91–116.
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