Species of Humbertium are characterized by the presence of a well developed penis papilla in the copulatory apparatus, similar to the one in Bipalium, but with the ovovitelloducts entering the female atrium anteriorly and not posteriorly as in Bipalium.[1]
Etymology
The genus Humbertium is named after the Swiss naturalist Aloïs Humbert who described several species from Sri Lanka that are now classified in the genus.[1]
Species
The genus Humbertium contains the following species:[2]
^ abOgren, R. E.; Sluys, R. (2001). "The genus Humbertium gen. nov., a new taxon of the land planarian family Bipaliidae (Tricladida, Terricola)". Belgian Journal of Zoology. 131 (1): 201–204.
^ abcSolà, E., Sluys, R., Riutort, M., Kawakatsu, M. (18 August 2023). "Molecular phylogenetics facilitates the first historical biogeographic analysis of the hammerhead worms (Platyhelminthes: Tricladida: Bipaliinae), with the description of twelve new species and two new genera". Zootaxa. 5335 (1): 1–77. doi:10.11646/zootaxa.5335.1.1. ISSN1175-5334.