Montistrongylus, Smales & Heinrich, 2010

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 : 10

3.3 Genus MONTISTRONGYLUS Smales & Heinrich, 2010 ( Fig. 3 )

Type species: Montistrongylus ingati Smales & Heinrich, 2010 .

Hosts: Muridae , Murinae ( Rodentia ).

Host site: small intestine.

Distribution: Papua New Guinea.

Other species: Montistrongylus giluwensis Smales, 2011 ; Montistrongylus karungi Smales, 2012 ; Montistrongylus kaindiensis Smales, 2015 .

Original diagnosis: Nippostrongylinae . Synlophe with up to 15 small pointed ridges, left ventral ridges largest: axis of orientation of ridges from ventral right to dorsal left, 55 ° from sagittal axis at mid body, lacking careen. Bursa slightly asymmetrical, right lobe larger, dorsal lobe about same length as lateral lobes. Pattern of bursal rays 3-2. Rays 8 asymmetrical, left ray longer. Dorsal ray divided distal to level of branching of rays 8 from dorsal trunk. Parasites of hydromyine murids [ 45].

3.3.1 Analysis of data and difficulties encountered

In the four species described, a careen is absent and the ridges are grouped into two or three sets alternating with two or three ridge-free spaces. Herein, for the description of the synlophe of each species, the ridge sets will be numbered (set 1, set 2, set 3) clockwise starting from the left (set 1). Axis of orientation described as oblique all along body by Smales & Heinrich [ 45].

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.