Pristionchus trametes

Pristionchus trametes	Contents	Rev: 07/05/2022
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Pristionchus Menu	Economic Importance	Ecosystem Functions and Services
	Distribution	Management
Return to Diplogastridae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification:

Chromadorea
Diplogastria
Diplogastrida
Diplogastroidea: Diplogastridae; (formerly Neodiplogastridae
Mononchoidinae)

Pristionchus trametes Kanzaki & Hamaguchi, 2021

    Synonyms:

Morphology and Anatomy:

The eurystomatous form was not found in the original collection from Trametes orientalis; the species is described from the stenostomatous form.

The eurystomatous form of the species was not found in the collected material, and the species is typologically characterized by: its â€˜smallâ€™ stoma with thin, membrane-like cheilostomatal plates, a small triangular right subventral tooth, thorn-like dorsal tooth, and small left subventral denticles; a short, blunt male tail spike; and a short, conical female


Males: Monorchis, testis ventrally located, anterior part reflexed to right side; spermatogonia arranged in three to five rows in reflexed part, mature ameboid spermatocytes arranged in single to two row(s) in proximal part of gonad. Three (two subventral and one dorsal) cloacal gland cells at distal end of vas deferens and intestine. Spicules paired, separate; smoothly curved in ventral view, arcuate, Gubernaculum conspicuous, about one-third of spicule length, broad anteriorly such that dorsal wall is slightly recurved Cloacal opening a simple slit. One small, ventral, single genital papilla on anterior cloacal lip; nine pairs of genital papillae and a pair of phasmids present, Anterior five pairs of papillae almost equal in size, rather large and conspicuous, Tail conical, with short, ca. 0.6 caudal body diameter long with bluntly pointed tip. Bursa or bursal flap absen Females: Gonad didelphic, amphidelphic; each gonadal system arranged from vulva/vagina as uterus, oviduct, and reflexed ovary. Oocytes in ovary mostly arranged in three to four rows in distal two-thirds of ovary and in double or single row in rest of ovary Spermatheca not clearly distinct, but anterior part of oviduct immediately posterior to the junction functions as spermatheca. Vaginal glands present but obscure. Vagina perpendicular to body surface, surrounded by sclerotized tissue; Vvulva slightly protuberant in lateral view, pore-like in ventral view. Rectum about one anal body diameter long, intestine/rectum junction surrounded by well-developed sphincter muscle; three anal glands (two subventral and one dorsal) present but not obvious. Anus in form of dome-shaped slit, posterior anal lip slightly protuberant. Phasmid about two anal body diam. posterior to anus, or middle to 1/2-2/3 tail length posterior to anus. Tail short, conical with bluntly pointed or narrowly rounded terminus.
Ref: Kanzaki and Hamagouchi, 2021


	Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:

Back to Top

Distribution:

Described from the fruiting bodies of the wood-decaying fungus, Trametes orientalis in Kyoto, Japan.

Back to Top

Economic Importance:

Back to Top

Feeding:

Based on the source of the nematodes, this species is assumed to feed on fungi. However, attempts to culture the nematode in the laboratory, including on material from the fruiting bodies of Trametes orientalis, were unsuccessful. The eurystomatous form of the nematode was not found among the specimens collected (Kanzaki and Hamagouchi, 2021).

For Ecophysiological Parameters for this species, click	If species level data are not available, click for genus level parameters

Sommer, R. 2008. Genetic and transgenic approaches in the nematode model Pristionchus pacificus.Fifth International Congress of Nematology, Brisbane, Australia, July 2008.