Pointed structures on the penile glans and/or shaft
Not to be confused with Baculum.
Penile spines of a domestic cat
Many mammalian species have developed keratinized penile spines along the glans and/or shaft, which may be involved in sexual selection. These spines have been described as being simple, single-pointed structures (macaques) or complex with two or three points per spine (strepsirrhines).[1] Penile spine morphology may be related to mating system.[2][3]
^Alan F. Dixson (26 January 2012). Primate Sexuality: Comparative Studies of the Prosimians, Monkeys, Apes, and Humans. Oxford University Press. ISBN 978-0-19-954464-6. Retrieved 27 September 2013.
^Orr, Teri J., and Patricia LR Brennan. "All Features Great and Small—the Potential Roles of the Baculum and Penile Spines in Mammals." Integrative and Comparative Biology (2016): icw057.
^Stockley, P. "Sperm competition risk and male genital anatomy: comparative evidence for reduced duration of female sexual receptivity in primates with penile spines. Archived 2017-02-06 at the Wayback Machine" Evolutionary Ecology 16.2 (2002): 123-137.
have developed keratinized penilespines along the glans and/or shaft, which may be involved in sexual selection. These spines have been described as being...
well-understood. They are usually considered as vestigial remnants of penilespines, sensitive features found in the same location in other primates. PPPs...
the original on 2013-02-22. Aronson, L. R.; Cooper, M. L. (1967). "Penilespines of the domestic cat: their endocrine-behavior relations" (PDF). Anat...
Echidnas are medium-sized, solitary mammals covered with coarse hair and spines. The spines are modified hairs and are made of keratin, the same fibrous protein...
In male human anatomy, the glans penis or penile glans, commonly referred to as the glans, (/ɡlænz/; from Latin glans meaning "acorn") is the bulbous structure...
The baculum (pl.: bacula), also known as the penis bone, penile bone, os penis, os genitale, or os priapi, is a bone in the penis of many placental mammals...
which is covered with small spines. Female genitourinary system Male genitourinary system Male genitourinary system Penilespines Cats are familiar and easily...
Penile fracture is rupture of one or both of the tunica albuginea, the fibrous coverings that envelop the penis's corpora cavernosa. It is caused by rapid...
receptor (AR) gene may be responsible for the loss of whiskers and penilespines in humans compared to its close relatives, including chimpanzees.[citation...
about 120–150 backward-pointing penilespines, which are about 1 mm (0.039 in) long; upon withdrawal of the penis, the spines may provide the female with...
a lump, not as recognizable teeth. Castration anxiety Emasculation Penilespines Penis captivus Anti-rape device Sheela na gig Teeth, a 2007 comedy horror...
affected. This suggests that penilespines do not increase the reproductive success of males, and it is suspected that the spines do not increase reproductive...
male and female spotted hyenas, the base of the glans is covered with penilespines. In the development of the urinary and reproductive organs, the glans...
glans. In both males and females, the base of the glans is covered with penilespines. The formation of the pseudo-penis appears largely androgen independent...
reproductive system Human reproductive system Mammalian penis Os penis Penilespines Genitalia of bottlenose dolphins Genitalia of marsupials Equine reproductive...
not occur in any other species. The surface is spined with doubled headed or even tridentate penilespines pointing towards the body. They are less densely...
from the end. The glans and shaft are covered in single keratinised penilespines that point towards the body. During mating season which occurs in June...
the top and a ridge at the bottom. Most of the glans is covered with penilespines, except for an area near the tip. Thomasomys ucucha occurs only in the...
Rupture of the urethra is an uncommon result of penile injury, incorrect catheter insertion, straddle injury, or pelvic girdle fracture. The urethra, the...
is acquired during sexual intercourse and presents with low back pain, penile discharge, low grade fever and an inability to pass urine. The exact number...
to facilitate childbirth. Unlike most primates, human males do not have penile bones. The axial skeleton (80 bones) is formed by the vertebral column (32–34...
raised, ventral arching of the spine and a raising, or sideward displacement, of the tail. During lordosis, the spine curves dorsoventrally so that its...
non-erectile structure". The clitoral glans is homologous to the male penile glans. Other descriptions of the glans assert that it is composed of erectile...
spines, which are usually missing, are similar to the marginal spines. The four to seven penile, straight to slightly curved, brown marginal spines are...
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