Calypsostrongylus

Calypsostrongylus	Contents	Rev: 03/31/2026
	Classification	Biology and Ecology
	Morphology and Anatomy	Life Cycle
Return to Calypsostrongylus Menu		Ecosystem Functions and Services
	Distribution	Management
Return to Heligmonellidae Menu	Feeding	References
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Classification:

Chromadoria
Rhabditida: Rhabditina
Infraorder Rhabditomorpha
Heligmosomoidea: Heligmonellidae
Brevistriatinae

Calypsostrongylus Schmidt, Myers & Kundt, 1967
Type species of genus: Calypsostrongylus ogdeni Schmidt, Myers & Kundt, 1967

Synonyms:

Morphology and Anatomy:

Small, delicate nematodes with inflated head vesicle bearing punctiform spots and several transverse striations.
No cervical or prebursal papillae or alae.
Cuticle with longitudinal and transverse striations arranged on ventral side as short elongate plaques with transverse striations, arranged quincunxially as in Brevistriata; dorsal to the lateral field are prominent narrow transverse striations arranged in six longitudinal strips, three contiguous on each side of a dorsal bare strip lacking striations. Thin longitudinal ridges between longitudinal fields of transverse striations as in Longistriata.
Cuticle swollen anterior to bursa and vulva.
Excretory pore near posterior end of esophagus.

Ref: Schmidt et al., 1967

Females:

Monodelphic
Vulva near anus
Tail conical, pointed
Oviparous

Males:

Bursa asymmetrical, right lobe larger than left, rays similar in shape. Externodorsal rays arising from different levels on dorsal ray stem. Dorsal ray with 6 terminal branches.
Spicules equal, filiform, simple, distal ends tightly enclosed in hyaline membrane,
Gubernaculum present, weakly sclero tized.
Genital cone prominent

Body size range for the species of this genus in the database - Click:

Distribution:

Type species described from a squirrel, Callosciurus erythraeus from Taiwan.

Feeding:

Food Sources and Feeding strategies for the genus Calypsostrongylus

Gastro-intestinal parasites of squirrels and other rodents

Life Cycle:

For Ecophysiological Parameters for this genus, click

Ecosystem Functions and Services:

Schmidt, G.D., Myers, B.J., Kuntz, R.E. 1967. Nematode parasites of Oceanica 1. Brevistriata sundasciuri sp.n. and Calypsostrongylus ogdeni gen. et sp. n. (Heligmosomatidae: Longistriatinae) from squirrels of Palawan and Taiwan. J. Parasitology 53:613-617.