Genital Pore

genital pore

[′jen·ət·əl ′pȯr]
(invertebrate zoology)
A small opening on the side of the head in some gastropods through which the penis is protruded. Also known as genital orifice.

Genital Pore

 

a paired or unpaired opening in cyclostomes and some bony fishes that connects the body cavity to the environment and that serves to eliminate eggs and sperm. Genital pores are found in cyclostomes of both sexes; they open into the urogenital sinus (lampreys, Bdellostoma) or into the cloaca (hagfishes). Genital pores are not paired in many eels or in several teleosts, including salmon. In these fishes only females have a single genital pore, which is usually situated behind the anal opening.

References in periodicals archive ?
On staining, the segments using borax carmine and examining under microscope, presence of rosette shaped uterus with numerous eggs at the centre and uterine pore situated mid ventrally just behind the genital pore was revealed in each segment.
Genital pore located on the left of acetabulum, opening to the genital atrium, above or sideways of the male genital papilla.
This tapeworm can be easily distinguished from other human infecting diphyllobothriideans by the presence of pits alongside the median line on the ventral surface of ils proglottids; smaller, more spherical, eggs; and Ihc almost equatorial position of the genital pore, a feature that is markedly pre equatorial in other species (online Technical Appendix Figure 1, http://wwwnc.cdc.gov/EID/ article/20/ll/14-0996-Techapp 1 htm).
The genital pore was clearly observed only in a mature C.
Pupae were sexed by examining the location and shape of the genital pore (Oleiro et al.
quadruncus, have evolved modifications that appear to function as a blocking device - essentially a big ball of tissue blocking most of the genital pore - restricting entry of the male's gonopodial tip.
Genital pore is at the base of oesopahgus, cirrus sac long extending between anterior level of acetabulum and base of oesophagus, testes 10 in two inter-caecal rows in posterior half of the body.
According to these authors, the main characteristics of Pseudempleurosoma are: two pairs of dissimilar anchors, dorsal anchor large with unpaired median connecting bar, and ventral anchor smaller with two pairs of connecting bars associated with each anchor; caeca with numerous lateral diverticula, united posteriorly; copulatory organ tubular, slender, twisted or not; accessory piece present; genital pore median and ovary pretesticular (SANTOS et al.
(1,4,5,7) They are longer than they are wide (approximately 12 by 3mm), (8) contain two sets of reproductive organs, are tapered at both ends, and possess a genital pore on both sides (Figure 2).
Such worms gradually develop a pair of ovaries, testes, copulatory apparatus, yolk glands, and a genital pore.