Filiponema champa

Filiponema champa	Contents	Rev: 02/09/2024
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
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Classification:

Rhabditida Tylenchina Drilonematoidea
Drilonematidae: Iponematinae

Filiponema champa Ivanova & Spiridonov, 2015

Synonyms:

Morphology and Anatomy:

Body wide, cylindroid in mid-region, slightly tapering towards anterior extremity.
Cuticle transversely striated, lateral fields faint, between posterior of amphids to mid-tail
Head bluntly rounded, with slight constriction at level of amphids.
No apparent lips, mouth aperture surrounded by thin border.
Cephalic sensilla papilliform with protruding bristles, ten (6 + 4),
Amphid apertures large, >33% of corresponding diam. wide,with 8 un long sensilla visible inside amphidial aperture.
Mouth aperture small, triangular, Stoma small funnel-shaped stoma.
Pharynx cylindroid, moderately expanded at anterior and at base. Nerve ring surrounding pharynx base. Cardia and intestine well developed.
Excretory pore situated well posterior to pharynx base, Excretory gland enormous, with milky, non-transparent content.
Tail curved, broadly conical with blunt, relatively wide. Caudal organs at mid-tail, similar in shape to amphids but with a slightly wider rim and two sensilla..

Females:

Monodelphic, prodelphic. Ovaryreflexed with tip located in tail region.
Developing oocytes initially in three, then two, and finally one row.
Spermatheca not distinctly offset,
Vulva post-median. Vagina short, oblique. Vulval lips small.
Short, non-functional post-uterine sac.
Tail ventrally or, rarely, dorsally curved, short, about two abd. long.
Rectum and anus present.
Caudal organs anterior to mid-tail,.

Ref: Ivanova and Spiridonov (2015)

Filoponema champa, male anterior: note amphid, excretory pore and excretory gland and spicule morphology.
Drawing adapted from Ivanova and Spiridonov, 2015

Males:

Monorchic, testis reflexed
Vas deferens and ejaculatory duct distinct, separated by slight constriction.
Spicules paired, equal, short, with right-angle bend at middle
Gubernaculum massive, boat-shaped.
Tail curved ventrally.
Three pairs of hair-like, precloacal, caudal sensilla, and seven pairs of postcloacal sensilla and a pair of prominent subventral papillae located anterior to caudal organs
Caudal organs located at mid-tail, smaller in size than in female

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

Distribution:

Parasites of the coelomic cavity of earthworms. Described from Pheretima sp. in Cha Yang Sin National Park, Dak Lak Province, Vietnam.

Life Cycle:

Ecophysiological Parameters:

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

Ivanova, E.S. and Spiridonov, S.E. 2015. Four new species of Iponematinae (Drilonematidae, Drilonematoidea, Cephalobomorpha) parasitic in earthworms: description and molecular affiliations. Nematology 17: 1207-1227.

Ivanova, E.S. and Neuhaus, B. 2011. A revision of the Iponematinae (Nematoda: Drilonematoidea) with description of three new species parasitic in tropical earthworms. Nematology 13: 639-652.