Montistrongylus giluwensis, Smales, 2011

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 : 12-13

3.3.1.2 Montistrongylus giluwensis ( Figs. 3E–3 H’)

3.3.1.2.1 Synlophe (based on sections from six worms, sex not specified).

Sections analyzed herein are those within proximal part of body: male ( Fig. 4 /3E) and female (Fig. 14/3F) and at midbody: male ( Fig. 9 /3G) and female (Fig. 16/3H); lateral cords illustrated in Figures 4 /3E and 14/3F; ridges numbered in Figures 4 /3E and 16/3H; careen absent.

In all sections, three ridge sets alternating with three ridge-free spaces (arrowheads).

Within proximal body: in Figure 3E (male), ridge set 1 situated on left side in front of left lateral field, made up of five small ridges (3’-1, 1 and 2) similar in size; regularly spaced and oriented perpendicularly to body surface; ridge set 2 situated on right-dorsal quadrant, made up of six small ridges (3 to 8) similar in size, regularly spaced and oriented from right to left; ridge set 3 situated on ventral side, made up of seven small ridges, ridges 5’ to 7’ slightly larger than other ridges; ridges regularly spaced with ridges 5’ to 7’ oriented from right to left, other ridges oriented perpendicularly to body surface.

Figure 3F (female): ridge set 1 situated on left-dorsal quadrant, made up of four small ridges similar in size, regularly spaced (with large spaces) and oriented perpendicularly to body surface; ridge set 2 situated on dorsal, right-dorsal side, made up of four small ridges, similar in size, regularly spaced (with small spaces) and oriented from right to left; ridge set 3 situated on mid-ventral side, made up of seven ridges of which the left ones slightly larger (except the last ridge one, minute), all ridges oriented from right to left.

At midbody: in Figure 3G (male), ridge set 1 situated on left side, made up of five small ridges unequal in size, regularly spaced and oriented from right to left (three dorsal ridges) or perpendicularly to body surface (other two ridges); ridge set 2 situated on right-dorsal side, made up of eight small ridges oriented from right to left (three dorsal ridges) or perpendicularly to body surface (other ridges); ridge set 3 situated on mid-ventral side, made up of six small ridges, median three being slightly larger, oriented from right to left.

Figure 3H (female): ridge set 1 situated on left side, made up of five ridges (3’ to 1’, 1 and 2), almost similar in size, regularly spaced, oriented perpendicularly to body surface; ridge set 2 situated on right-dorsal side, made up of six small ridges, almost similar in size, regularly spaced and oriented from right to left; ridge set 3 situated on ventral side, made up of eight small ridges (5’, 6’ largest, then 4’, 7’, 8’ then 9’ to 11’ minute) regularly spaced and oriented from right to left except ridges 9’ to 11’ oriented perpendicularly to body surface.

3.3.1.2.2 Bursa (number of worms studied not specified, illustrated in [ 33]: Figs. 10 , 12 and 13). Figure 10 : distal part of dorsal ray with rays 8, dorsal view; right ray 8 clearly extending beyond division of dorsal ray. Figure 12: left lobe and left proximal part of dorsal ray, dorsal view. Figure 13: right lobe and right proximal part of dorsal ray, dorsal view; right ray 8 just reaching level of division of dorsal ray. From the original written description [ 33]: bursa symmetrical with right lobe slightly larger than left one and pattern of type 2-3 in both lobes.

Figures

Figure 3a. Montistrongylus Smales & Heinrich, 2010. Body sections. A–D’ Montistrongylus ingati Smales & Heinrich, 2010. A–B’ within proximal body. A male, B, B’ female. C–D’ at midbody. C male, D, D’ female. E–H’ Montistrongylus giluwensis Smales, 2011. E, F within proximal body. E male, F female. G–H’ at midbody. G, G’ male, H, H’ female. Sources: A, D redrawn from [45]; E–H redrawn from [33]. B’, D’, G’, H’ modified figures: B’ rotated ca. 75° counterclockwise with respect of the original. D’–H’ reinterpreted orientation of the axis (subfrontal). G’ reversed on its frontal axis then rotated 30° clockwise with respect to the original. H’ rotated ca. 10–20° counterclockwise with respect to the original.

Figure 4. Genus Pogonomystrongylus Smales, 2014. Body sections. A–D’ Pogonomystrongylus domaensis Smales, 2014. A–B’ within proximal body. A, A’ male, B, B’ female. C–D’ at midbody. C, C’ male, D, D’ female. Source: A–D redrawn from [36]. A’–D’, modified figures: A’–C’ reversed on their frontal axes with respect to the originals, then slightly rotated clockwise. D’ rotated 45° clockwise.

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.

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.