Helgenema, Smales, 2020

Durette-Desset, Marie-Claude & Digiani, María Celina, 2023, Revision of the genera of Heligmonellidae (Nematoda, Heligmosomoidea), parasitic in Muridae from New Guinea, Parasite (Paris, France) 30 (63), pp. 1-34 : 25

3.10 Genus HELGENEMA Smales, 2020 ( Fig. 10 )

Type species: Helgenema keablei Smales, 2020 .

Hosts: Muridae , Uromyinae ( Rodentia ).

Host site: small intestine.

Distribution: Papua New Guinea.

Other species: Helgenema lamia Smales, 2021 .

Original diagnosis: Heligmonellidae , Nippostrongylinae. Synlophe well developed with 11-15 pointed longitudinal continuous ridges. Cuticle with dilatation on left side supported anteriorly by large left dorso-lateral ridge. Axis of orientation sub frontal. Bursal pattern 2-3. Dorsal ray divided within distal half. Spicule to body length ratio 7.2%. Parasites of uromyin murids [ 43].

Figures

Figure 10. Genus Helgenema Smales, 2020. Body sections. A–C’ Helgenema keablei. A, A’ within proximal body, female. B–C’ at midbody. B, B’, male. C, C’ female. D–F’ Helgenema lamia Smales, 2021. D within proximal body, male. E–F’ at midbody. E, E’ male, F, F’, female. Sources: A–C redrawn from [43]. D–F redrawn from [44]. A’–C’, E’, F’ modified sections: A’ reversed on its frontal axis with respect to the original, B’ reversed on frontal axis then rotated ca. 15° clockwise with respect to the original. C’, E’, F’ re-numbering of ridges.