Rhabdochona mexicana

Rhabdochona mexicana	Contents	Rev 02/23/2024
	Classification	Hosts
	Morphology and Anatomy	Life Cycle
Return to Rhabdochona Menu	Economic Importance	Damage
	Distribution	Management
Return to Rhabdochonidae Menu	Feeding	References
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Classification:

Chromadorea Chromadoria

Rhabditida

Spirurina

Thelazioidea

Rhabdochonidae

Rhabdochona mexicana Caspeta-Mandujano, Moravec & Salgado-Maldonado, 2000

Morphology and Anatomy:

Medium sized nematodes with smooth cuticle.
Oval mouth opening surrounded by four minute cephalic papillae and two lateral amphids.
Prostoma funnel-shaped, wide, with basal teeth, anterior margin of prostoma armed internally with 10 teeth (3 dorsal, 3 ventral and 2 lateral on each side).
Vestibule relatively long.
Small bifurcate deirids a short distance posterior to prostoma.
Tail of both sexes conical, with rounded end, without terminal spike.

Male:

Three or 4 precloacal subventral papillae on one side and 5 papillae on the other side.
Additional two pairs of lateral preanal papillae present between first, second and third subventral precloacal pairs.\Six pairs of postcloacal papillae:
Area rugosa absent.
Larger (left) spicule 0.468-0.587 (0.534)um long; distal tip reduced, ending in a small bifurcation covered by narrow membrane. Smaller (right) spicule 0.082-0.108 (0.102)um long, without dorsal barb.
Tail conical, 0.165-0.217 (0.217)

Female:

Vulva postequatorial,.
Muscular vagina directed posteriorly.
Uterus not reaching level of posterior end of esophagus anteriorly.
Surface of eggs with fine, irregular flock-like coating

Ref: Caspeta-Mandujano et al., 2000

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

Distribution:

Described from the characid fish Astyanax mexicanus from the Panuco River freshwater drainage system in central Mexico.

Feeding:

Intestinal parasite of Astyanax mexicanus.

Life Cycle:

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

Ecosystem Functions and Services:

Caspeta-Mandujano, J.M., Moravec, F. and Salgado-Maldonado, G. 2000. Rhabdochona mexicana sp. n. (Nematoda: Rhabdochonidae) from the intestine of characid fishes in Mexico. Folia Parasitologica 47:122-215.

Moravec, F. 1998: Nematodes of Freshwater Fishes of the Neotropical Region. Academia, Praha, 464 pp.