Montistrongylus, Smales & Heinrich, 2010

Smales, Lesley, 2019, Gastrointestinal nematodes of Paramelomys platyops (Rodentia: Muridae) from Papua Indonesia and Papua New Guinea with the descriptions of a new genus and five new species of Heligmonellidae (Nematoda: Trichostrongylina) and a key to the species of Hughjonestrongylus, Zootaxa 4679 (1), pp. 107-125 : 122

Montistrongylus sp.

( Figs 65, 69 )

A male, a female and a piece of female were recovered from an individual of P. platyops collected from 14 k north northwest of Wanuma, Madang Province, Papua New Guinea by A. B. Mirza, 21. iii. 1074, BBM NG104240A.

These worms had a synlope of 13 ridges conforming to the description of the synlophe of the genus Montistrongylus . The male measurements: length 4.9 mm, width 120.6, oesophagus length 450, spicule length 650, gubernaculum 59.5. The female, measurements: length 6.5 mm, width 121, cephalic vesicle 47 length, oesophagus length 369, excretory pore 215 from anterior end, vulva 230 from posterior end, with praepuce, ovejector with vagina 50, vestibule 50, sphincter 65, infundibulum 220 long; tail 60. These specimens could be distinguished from the type species, Montistrongylus ignati Smales & Heinrich, 2010 , in having longer spicules (650 compared with 380–450) and in the differing proportions of the ovejector, the infundibulum being the longest element not the vestibule. The only other species in the genus, Montistrongylus giluwensis Smales, 2011 could be distinguished from Montistrongylus sp. by the larger number of ridges on the synlophe (18–20) in the mid body and a dilated vagina. Montistrongylus ignati is found in Paramelomys rubex (Thomas) , M. giluwensis in Coccymys ruemmleri (Tate & Archibald) and Montistrongylus sp. in P. platyops (see Smales 2011b; Smales & Heinrich 2010).

Since the details of the bursa and spicule structures could not be observed on the only available male specimen it was not possible to prepare a detailed description of the putative new species.

Figures

FIGURES 65–70. Nippostrongylinae. In all illustrations of the synlophe in transverse section the dorsal aspect of the body is oriented towards the top of the page and the left side of the nematode to the left of the page. The dorsal and ventral (numbers with superscripts) ridges are numbered. Montistrongylus sp. 65. Female, posterior end 69. Female transverse section, mid body; Hughjonestrongylus sp.1; 66. Female, transverse section, mid body. Hughjonestrongylus sp.2; 67. Female, transverse section, mid body. Hasanuddinia sp. 68. Male transverse section, mid body; 70. Gubernaculum and spicule tips, lateral view. Scale bars in µm: 65, 75; 66, 67, 69, 25; 68, 10; 70, 50.