Plectus longicaudatus Biitschli.

• Main Author: Allgén, C. A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 1953
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Chromadorea; Plectida; Plectidae; Plectus; Plectus longicaudatus; Jan Mayen
• Online Access: https://doi.org/10.5281/zenodo.10809510; http://treatment.plazi.org/id/03B087844608FFC3FE187F012165FC2F

Plectus longicaudatus Biitschli. (Fig. 2.) Btitschli, 1873, p. 92, pl. vi, fig. 38 a-b. de Man, 1884, p. 114, pl. xviii, fig. 73. de Man, 1885, p. 8. de Man, 1907, pp. 18-19, Plectus spec. Brakenhoff, 1913, p. 294. Steiner, 1914, p. 261. Steiner, 1916, pp. 53-54. Micoletzky, 1922, pp. 225-227, fig. 6. Dimensions.- ♂. Body - length=l.0 7 5 mm., max. width=0.0 2 8 mm., oesophagu s= 0.278m m., tail = 0. 1 3 0 m m., α.= 38.39, β =3. 8 7, γ=8.2 7. ♀. Body -length = 1.140 mm., max. width =0-039 mm., oesophagus ==0.2 8 5 mm., t a i l=0.1 3 1 mm., α=2 9.2 3, β = 4.0, γ=8.7 0, The body is o f nearly e v e n thickness from the posterior end of the oesophagus t o the anus and t a p e r s only gradually in the foremost p a r t o f the (esophageal region. The cuticle is finely annulated. The head is rounded, a n d papillate at the front end. The small buccal c a v i t y is cylindrical t o funnel-shaped. Lateral organs situated 16 t ~ behind the front end, simply spiral-shaped, 2t ~ in section, i.e. 2/9 of the corresponding head-diameter. Esophagus elongated, thin, posteriorly w i t h a moderately large, strongly muscular bulb. Although the tail seems t o be relatively longer a n d narrower than de Man has figured it, the specimens from Jan Mayen are rather typical representatives of this easily recognizable, terrestrial, long-tailed species, described first b y Biitschli in 1873 from " roots o f different fungi " I n the male there seems to be a single tubular d u c t in front o f the anus. Female organs paired, symmetrical, probably with reflexed ovaries. I n a female was found an egg with the dimensions: 54/~ x 28 t *. Published as part of Allgén, C. A., 1953, Terrestrial nematodes from Jan Mayen, pp. 665-688 in Annals and Magazine of Natural History 12 (6) on pages 671-672, DOI:10.1080/00222935308654469, http://zenodo.org/record/10811051