Mononchus papillatus Bastian.

• Main Author: Allgén, C. A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 1953
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Enoplea; Mononchida; Mononchidae; Mononchus; Mononchus papillatus; Jan Mayen
• Online Access: https://doi.org/10.5281/zenodo.10809564; http://treatment.plazi.org/id/03B08784461EFFD5FE487F9F2169FC46

Mononchus papillatus Bastian. (Fig. 8.) Ba s tian, 1855, p. 108, pl. x, figs. 52-53. Bütsehli, 1873, p. 76, pI. iii, fig. 19 a~b. de Man, 1884, pp. 64-65, pl. ix, fig. 35. Dimension s.- Body -length = 1.720 mm., max. width=- 0.055 mm., oesophagu s=0.4 9 7 mm., tail= 0.148 mm., vulva= l.088 mm., α= 3 1. 2 7, β =3.46, y =11.62, V = 63.26 per cent. 111 the sample from J2 was recorded a juvenile female o f the genus M o n o n c h u s Bastian, which in its general shape seems to agree rather well with M. l~apillatu~' Bast. This applies especially to the shape of the buccal cavity, which is ~u'med with a v e r y anterior dorsal tooth. The front end is e v i d e n t l y r o u n d e d b u t not bent o u t w a r d s as in the species of de Man (pl. ix, fig. 35). I t should bc mentioned t h a t the ventral wall of the buccal c a v i t y of the J a n M a y e n specimen is v e r y finely toothed. The ventral wall mostly is absolutely smooth, not toothed as in M. muscorum Duj., closely related t o this species, a n d Bastian, who first described M. papillatus, also figured it in such a manner. Ditlevsen (1911) has, however, pointed o u t that Biitschli (1873) figured a h e a d of M. papillatus, the ventral wall o f the buccal cavity of which is evidently toothed, although not so strongly as in the alternative species. According to Mieoletzky it m a y sometimes, when the ventral wall is more strongly (sharply) toothed, be very difficult to separate this species from the old M. muscorum. I n this respect especially the structure o f the buccal cavity of the Jan Mayen specimen, the ventral wall o f which is evidently but more weakly toothed than in M. muscorum, seems t o agree rather well with the figure given b y Btitschli. Only the tail differs from this established cosmopolitan species, since it certainly tapers gradually posteriorly b u t seems to be a little more elongated and slender than in the type-specimen, figured b y de Man. Published as part of Allgén, C. A., 1953, Terrestrial nematodes from Jan Mayen, pp. 665-688 ...