Revision of the genera of Heligmonellidae (Nematoda, Heligmosomoidea), parasitic in Muridae from New Guinea Author Durette-Desset, Marie-Claude Institut de Systématique, Évolution, Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, CNRS, Sorbonne Université, Author Digiani, María Celina CONICET-Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina & División Zoología Invertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, text Parasite 2023 Paris, France 2023-12-20 30 63 1 34 http://dx.doi.org/10.1051/parasite/2023058 journal article 10.1051/parasite/2023058 1776-1042 PMC10732140 38117273 12628842 DC25665A-E218-496B-974E-B813F69395E5 3.3.2.1 Montistrongylus ingati 3.3.2.1.1 Synlophe. The two male sections ( Figs. 3A, 3C ) differ from each other and seem not to belong to the same taxon. In addition, they have two major differences with the female sections ( Figs. 3B, 3D ): there are two sets of ridges in male versus three in female and, on the other hand, in the female sections, the axis of orientation is subfrontal ( Fig. 3D’ ) and not oblique, as illustrated in the original figures. In the female proximal body, to be congruent with the female section at midbody, the section should be rotated ca. 75° counterclockwise ( Fig. 3B’ ). 3.3.2.1.2 Bursa. From the original written description, the left ray 8 is longer than right ray 8 and the right lobe is slightly larger than left one. This means that Figures 63 and 65 are in dorsal view. The pattern is 2-2- 1 in the right lobe and 2-3 in the left lobe. The illustration of two types of dorsal lobes (Figs. 63 and 65) reinforces the idea that two types of males are present among the type material, i.e. , probably two different taxa. We have no information to attribute the described bursae to a given type of synlophe.