A hemipenis (pl.: hemipenes) is one of a pair of intromittent organs of male squamates (snakes and lizards). Hemipenes are usually held inverted within...

located in the base of the tail. The hemipenis is retracted inside of the body when mating is not occurring. The hemipenis is similar to the human penis. Females...

reptiles, some fish, and most birds) occur via cloacal copulation (see also hemipenis), while mammals copulate vaginally, and many basal vertebrates reproduce...

Ventral view of mating house geckos, with hemipenis inserted in the cloaca, and adhesive lamellae under the feet...

evidence indicates that males alternate use between copulations. The hemipenis has a variety of shapes, depending on the species. Often it bears spines...

inserting a probe into the cloaca to check the presence of an inverted hemipenis. The ball python is native to west Sub Saharan Africa from Senegal through...

possessing larger preanal pores than the females as well as a distinct hemipenis pocket. Males tend to be stockier than females with the exception of R...

birds, mammals, and turtles. The hemipenis can be found in the base of the tail. The tuatara does not have a hemipenis, but instead has shallow paired...

Common house geckos mating, ventral view with hemipenis inserted in the cloaca...

birds) occurs via cloacal copulation, known as cloacal kiss (see also hemipenis), while most mammals copulate vaginally, and many basal vertebrates reproduce...

male examples of Squamata, have two hemipenes. During copulation, one hemipenis is inserted into the female's cloacal vent. A female can store sperm from...

spineless hemipenis without papillae; the hemipenis has a long calyculate region beginning at some distance from the fork of the hemipenis and continuing...

Michael; Walley, Harlan D. (25 August 2009). "Behavioural correlates with hemipenis morphology in New World natricine snakes". Biological Journal of the Linnean...

bilobed hemipenis in males. It is most closely related to the genera Myrrophis and Gyiophis, from which it can be distinguished by its bilobed hemipenis as...

classification of the Chamaeleonidae (Sauria) with special reference to hemipenis morphology". Bonner Zoologische Monographien. 22: 1–64. Tilbury, Colin...

vents nearly touching. The male then everts one of its sex organs, a hemipenis, into the female sex organ, the cloaca. The mating lasts a few minutes...

species. Delma butleri has also been misidentified as Delma inornata. The hemipenis is a consistent differentiating morphology between species of Delma. The...

insularis is the occurrence of "intersexes", individuals born with both a hemipenis and female reproductive parts. Duarte et al. attribute these intersexes...

posterior chin shields. Each maxilla has 9–12 small teeth. The single hemipenis has a forked sulcus spermaticus and three large basal spines. Juveniles...

at the tip to allow firm attachment to the female. To become erect, a hemipenis is evaginated (turned inside out) through muscle action and engorgement...

group differing from Lacerta by the construction of the skull and the hemipenis, and by the processes of the caudal vertebrae. They are commonly known...

undivided subcaudals for the full length of the tail, as well as a simple hemipenis completely covered in calyces with a largely non-bifurcated sulcus spermaticus...

Classification of the Chamaeleonodae (Sauria), with special reference to hemipenis morphology". Bonn. zool. Monogr. 22: 1-64. (Calumma boettgeri, new combination)...

cloacal area has very pronounced preanal pores and a bulge in the area of hemipenis. In many females two endolymphatic chalk sacs, located on each side of...

stress causes her cloaca to open, and aids the male in inserting his hemipenis. The stronger and more frequent the caudocephalic waves and the closer...

his vent for mating. Males seem to alternate between the left and right hemipenis on successive matings. The female matures one ovarian follicle at a time...

posterior chin shields. Each maxilla has 9–12 small teeth. The single hemipenis has a forked sulcus spermaticus and three large basal spines. Adult males...

up to 30 days to hatch. The male vasas' cloaca is able to evert into a hemipenis, which becomes erect during mating – a feature unique to the genus. This...

classification of the Chamaeleonidae (Sauria) with special reference to hemipenis morphology. Bonner Zoologische Monographien 22: 1–64. Klaver, C.J.J. &...

corkscrew shaped penis, similar to those of the other ratites and to the hemipenis of some reptiles. The female has a small phallic organ in the cloaca which...