Flannerystrongylus abulus, Smales, 2019

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 : 23

3.9.1.1 Flannerystrongylus abulus ( Figs. 9A–9C )

3.9.1.1.1 Synlophe (based on sections from ten specimens; sex not specified). Sections analyzed herein are within proximal body: female ( Fig. 2 /9A) and at midbody: male ( Fig. 6 /9B) and female ( Fig. 5 /9C); lateral cords illustrated in Figures 2 /9A (left cord) and 2/9 C; ridges numbered in Figure 2 /9A.

In all sections, careen absent. Axis of orientation subfrontal within proximal body, not specified at midbody [ 42].

Within proximal body: in Figure 9A (female), 15 ridges regularly spaced and subequal in size; on dorsal side, ridges 1-4 and 6 oriented from right to left, ridges 5 and 7, perpendicular to body; on ventral side, all ridges oriented from right to left except ridge 8’ perpendicular to body; axis of orientation not passing through left lateral cord (right one not illustrated) but above and starting between ridges 7 and 8’ whose tips are not divergent, then passing between ridges 1 and 1’ whose tips are not convergent but divergent.

At midbody: in Figures 9B (male) and 9C (female), 15 ridges regularly spaced and subequal in size, oriented disparately.

3.9.1.1.2 Bursa (number of worms studied not provided, illustrated in [ 42]: Figs. 12, 14 and 15). Figure 12: left lateral view of one lobe (not specified), ventral rays situated towards bottom of page, only distal part of rays 2-8 illustrated, ray 8 joined proximally to ray 6. Figure 14: dorsal lobe, view not specified, only distal extremity of dorsal ray and rays 8 illustrated, both strongly curved, one of them extending beyond extremity of dorsal ray. From the written description: rays 8 diverge at level of division of dorsal ray, i.e., at one-third of length; left ray 8 larger. Figure 15: right lateral view of one lobe (not specified), ventral rays situated towards bottom of page; one branch of dorsal ray and distal part of rays 2-8 illustrated; ray 8 slightly curved and reaching level of extremity of dorsal ray; ray 6 straight, rays 4-5 apparently curved dorsally.

From the written description [ 42]: bursa dissymmetrical with left lobe larger; lateral rays 6 curved dorsally, rays 4, 5 ventrally; rays 4 largest; rays 2-3 diverge ventrally, reaching margin of bursa; pattern of type 2-3.

Figures

Figure 2. Genus Mawsonema Smales & Heinrich, 2010. Body sections. A–F’ Mawsonema mokwanense Smales & Heinrich, 2010. A, A’ within proximal body, male. B, C at midbody. B male, C female. D, E within distal body. D male, E female. F, F’ within proximal body, female. A–E synlophe of type I. F, F’ synlophe of type II. Source: A–F redrawn from [45]. A’, F’ modified figures: reversed on their frontal axes with respect to the originals. F’ axis of orientation reinterpreted as subfrontal.

Figure 5. Genus Nugininema Smales, 2016. Body sections. A–D. Nugininema titokis Smales, 2016. A, B within proximal body. A male. B female. C, D, at midbody. C male, D female. Abbreviations: co, comarete. Source: A–D redrawn from [38].

Figure 6. Genus Rodentanema Smales, 2016. A–D’. Rodentanema aenigma Smales, 2016. A–B’ head. A lateral or median view showing buccal capsule. B, B’ apical view. C, D sections at midbody. C male, D, D’ female. Abbreviations: bc buccal capsule. Source: A–D redrawn from [38]. B’, D’ modified figures: B’ six lips instead five. D’ rotated 90° counterclockwise with respect to the original.

Figure 9. Genus Flannerystrongylus Smales, 2019. Body sections. A–C Flannerystrongylus abulus Smales, 2019. A, A’ within proximal body, female. B, C at midbody. B male, C female. D–E’ Flannerystrongylus chisholmae Smales, 2020. D–E’ at midbody. D, D’ male. E, E’ female. Abbreviation: cu, cuticle. Sources: A–C redrawn from [42]; D, E redrawn from [43]. A’, B’, D’, E’: modified figures: A’ rotation clockwise, re-numbering of ridges with respect to the original. B’ rotation clockwise. D’, E’ addition of external cuticular lining. D’ re-numbering of ridges.