Robustostrongylus aferensis

Robustostrongylus aferensis	Contents	Rev 06/10/2025
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Robustostrongylus Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Haemonchidae Menu	Feeding	References
	Go to Nemaplex Main Menu	Go to Dictionary of Terminology

Classification

Chromadorea
Chromadoria
Rhabditida
Rhabditina
Stronglyloidea
Haemonchidae: Ostertagiinae

Robustostrongylus aferensis Hoberg, Abrams & Pilitt, 2009

Type species of the genus.

Synonyms:

Morphology and Anatomy:

Characterized by:

Ventriculus-like, bilobed esophago-intestinal valve (cardia) at the junction of the esophagus and intestine,
Synlophe with unusually robust ridges,
Cervical papillae and excretory pore located posterior to the mid-esophagus,
Unusually large diameter in males and females
Cuticle with well-developed synlophe: bilaterally symmetrical, similar in males and females, ridges robust, blunt, knob-like in transverse sections of body.
Nerve ring and orifices of subventral glands adjacent, in anterior third of cervical region.
Cervical papillae miniscule, thorn-like, situated posterior to level of excretory pore.
Esophagus well-developed with slightly broadened, bulb-like base
Esophageal-intestinal valve (cardia) prominent, bilobed, constricted, ventriculus-like, with oblique musculature.
Males and females monomorphic.
Relatively anterior position of the vulva,

Ref: Hoberg et al., 2009

Male:

Bursa prominent, structure is 2-1-2, with subequal Rays 2/3, strongly reduced and robust Rays 8, and relatively narrow Rays 9/10 contained within a reduced, laterally inflated dorsal lobe.
Spicules filamentous and tripartite;
Gubernaculum cryptic, alate, and heart-shaped in the anterior. .

Female:

Didelphic, amphidelphic, ovaries strongly convoluted, spiraled around intestine.
Vulva a transverse slit at 68-75% of body length from anterior;
Cuticular inflations and fans absent;
Synlophe modified as platelike structures posterior to vulva.
Perivulvar pores bilateral, located subventrally posterior to vulva in subventral.

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

Distribution:

Described from hosts collected in Uganda.

Hosts:

African antelope: Kobus kob (kob) and Alcelaphus buselaphus jacksoni (hartebeest).

Life Cycle:

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

Hoberg, E.P., Abrams, A. and Pilitt, P.A. 2009. Robustostrongylus aferensis gen. nov. et sp. nov. (Nematoda: Trichostrongyloidea) in Kob (Kobus kob) and Hartebeest (Alcelaphus buselaphus jacksoni) (Artiodactyla) from Sub-saharan Africa, with further ruminations on the Ostertagiinae. J. Parasitology 95:702-717.

Back to Top

Return to Robustostrongylus menu

Want more information about nematodes? Go to Nemaplex Main Menu.