gonopore


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gonopore

(gŏn′ə-pôr′)
n.
A reproductive aperture or pore, especially of certain insects and worms.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
The endophallic apodemes are more deeply cupped, and from their ventral margins two channels with a U-shaped cross section run ventrally and posteriorly to form the gonopore processes.
The orientation of gonadal lobes from gonopore to posterior area of visceral cavity, is an adaptation that could be advantageous to minimize water pressure on gonads during swimming.
Maturity of female crabs can be inferred from the presence of eggs, gonopore condition, or ovary development, but maturity of male crabs is difficult to determine.
"Having four hooks on the gonopodium may provide a means of overcoming female resistance, latching on to the gonopore and transferring sperm in a manner that facilitates effective sperm transfer.
Mature male sailfin mollies have a modified anal fin called a gonopodium, which they insert into the gonopore of a female during a mating attempt.
The mouth and gonopore are surrounded by unpigmented regions and are located ventrally behind the mid body region.
The other key traits included the presence (female) or absence (male) of the second pleopods and the gonopore position [at the base of third (female) and fifth (male) pereiopods].
Specific terms: Ancorae (A), Ventral aedeagal valves (Vv), Apodemes of cingulum (Apd), Bridge (B), Columella (C), Valves of cingulum (Cv), Ectophallic sheath (Es), Egg-guide (Eg), Floor pouches (Fp), Gonopore processes (Gpr), Lophi (L), Preapical appendix (Pa), Posterior edge (Pe), Zygoma (Zyg) (see Figs 7-8).
Leg 6 (not figured) rudimentary, represented by unarmed genital operculum at gonopore opening.
Aedeagal shaft flat in profile, apical 2/3 curved and gradually narrowing, gonopore subapical on the left side, ventro-basal protrusion of aedeagus much longer than shaft, broad at base, apical half slightly curved dorsad, in ventral aspect apex sinuate and strongly narrowing, slender process adjacent to shaft on left side shorter than shaft (Figs.
DIAGNOSIS: Pinophylus is distinguished from other conifer inhabiting genera of Phylini by the distinctive sexual dimorphism, with the costal margins of the hemelytra elongate and parallel-sided in the male and shorter and subovoid in the female; the brownish black dorsum with inconspicuous dark simple setae; the pretarsus with the base of the claw expanded and the pulvillus small; and the endosoma composed of two straps with a subapical secondary gonopore. Pinophylus alpinus is distinctive among congeners by the J-shaped endosoma with both straps sharply attenuate distal to the secondary gonopore.