cirrus sac

cirrus sac

[′sir·əs ‚sak]
(invertebrate zoology)
A pouch or channel containing the copulatory organ (cirrus) in certain invertebrates.
References in periodicals archive ?
Cirrus sac thick-walled, comma-shaped, inter-testicular, dextral (Fig.
No cirrus sac, terminal organs of male and female complexes lie free in parenchyma.
Cirrus sac large, elongate, curves to right of acetabulum, contains bipartite seminal vesicle with posterior half being larger than anterior part (Fig.
Sagittal sections of adult worms showed the cirrus sac lying horizontally with the seminal vesicle lying dorsocaudal to it.
Sagittal sections of the genital pore region of worms in Brazilian patients showed the cirrus sac lying horizontally with the seminal vesicle lying dorsocaudal to it, as described by Dick et el.
Based on the genital papillae, position of the cirrus sac, shape of the uterus, and egg dimensions, we tentatively identify the specimens as D.
Genital pore and cirrus sac in posterior third of body or at posterior tip of body, some distance from ventral sucker, ventral to gonads or ventral to ceca.
Body divided into flat forebody, containing the suckers and bulbous tribocytic organ, and a cylindrical hindbody which contains the organs of reproduction; testes tandem, in middle of hindbody; cirrus sac absent; seminal vesicle free in parenchyma; thick-walled paraprostate organ posterior to testes; genital atrium present; genital pore dorsal, near posterior end of body; hermaphroditic canal present; vitelline follicles in both fore- and hindbody or confined to forebody; parasitic in intestine of reptiles, especially alligators.
Body flat, spatulate, nonspinous; oral sucker subterminal; ventral sucker in anterior half of body; pharynx present; esophagus short; ceca long; testes tandem, in posterior third of body; ovary intertesticular; cirrus sac in hindbody, anterior to gonads; cirrus spiny; seminal vesicle bipartite, internal; genital pore in hindbody, ventral to left cecum; vitelline follicles around ceca in fore- and hindbody; uterus confined to hindbody; metraterm present.