Male Cheiracanthium mildei showing the enlarged and darker palpal bulbs at the end of the pedipalps
The two palpal bulbs – also known as palpal organs and genital bulbs – are the copulatory organs of a male spider. They are borne on the last segment of the pedipalps (the front "limbs" of a spider), giving the spider an appearance often described as like wearing boxing gloves. The palpal bulb does not actually produce sperm, being used only to transfer it to the female. Palpal bulbs are only fully developed in adult male spiders and are not completely visible until after the final moult. In the majority of species of spider, the bulbs have complex shapes and are important in identification.
The two palpalbulbs – also known as palpal organs and genital bulbs – are the copulatory organs of a male spider. They are borne on the last segment of...
tarsus, develops a complicated structure (sometimes called the palpalbulb or palpal organ) that is used to transfer sperm to the female seminal receptacles...
see also Palpalbulb Conductor: A part of the palpalbulb that accompanies and supports the embolus Embolus: The final part of the palpalbulb containing...
spiders use palpalbulbs instead of a penis to transfer sperm to females. Males of this new species of Theraphosidae have a subconical palpalbulb with many...
an American brand of scale model cars. The long coiled embolus of the palpalbulb of this new genus reminded the authors of a looping Hot Wheels track...
him. The male uses the palpalbulbs on his pedipalps to transfer sperm to the female. After inserting the second palpalbulb, the male dies, and is sometimes...
Eratigena agrestis requires microscopic examination of the epigynum and palpalbulb (the female and male sex organs respectively) and is best done by an...
species-specific structure used for mating (variously called a palpalbulb, palpal organ or copulatory bulb). The basal segments of the pedipalps, the coxae, next...
The male has an irregular-shaped palpalbulb with characteristic spikes, or apophyses. One, that is attached to the bulb itself, is large and sickle-shaped;...
species can be distinguished by the shape of the palpalbulb. When viewed retrolaterally, the palpalbulb of B. hamorii is narrower and less straight than...
light tan or bronze coloration and legginess. Additionally, males gain a palpalbulb on the pedipalps and tibial apophyses (mating hooks). The female eventually...
has a characteristically bulbous palpalbulb and a single long projection, or apophysis, extending from the palpal tibia. The female has very long and...
The males of this species differs from those of L. vetusta by the male palpalbulb, although some are easier to differentiate than others. Females of both...
Prószyński declared it should be reclassified as the spider has a different palpalbulb to others in the genus, but this was not undertaken. It is a medium-sized...
orchestration The Conductor (film), by Pavel Lungin, Russia, 2012 Part of the palpalbulb of male spiders The Orchestra Conductor, a 1980 Polish film by Andrzej...
by features of the male and female genitalia: the embolus of the male palpalbulb has one fewer loop as do the connecting ducts leading to the female spermatheca...
the upper surface of the abdomen. Males also have a differently shaped palpalbulb. They own type 2 urticating hairs, which are very slender, on a clearly...
indistinguishable from E. latimana, which can only be distinguished by the male palpalbulb and the epigyne of females, in mature spiders. The same patterns mentioned...
Mature males of the two species can be distinguished by the shape of the palpalbulb. That of B. smithi is straighter with a broad spoon shape when viewed...
on it, and charges his palpalbulbs with the sperm. Black widow spiders reproduce sexually when the male inserts his palpalbulbs into the female's spermathecal...
tibial spines on the legs and distinguished from the Olios genus by the palpalbulb morphology. They are commonly found in arid and semiarid deserts of Africa...
hairs on the cymbium that forms the main outer cover for the palpalbulb. The palpalbulb is bulgy, with a large bulbous protrusion at its base and rounded...
extremities of the pedipalps, males have the copulatory organs, called palpalbulbs, similar to an ampoule, that are used to transfer sperm to the female...
in females. Accurate identification depends on the shape of the male palpalbulb and the female epigyne. Although first collected in 1922 and 1924, Euophrys...
are unusual and help identify it. The male has a distinctive rounded palpalbulb that is recalled in the name of the species. It also has a very short...
(epigynum) and a "flow through" fertilization system; males have complex palpalbulbs. Molecular phylogenetic studies have supported the monophyly of Entelegynae...
its copulatory organs. It has a long thin embolus that encircles the palpalbulb and has a distinctive membane at its base. Mogrus cognatus is a jumping...
distinctive membrane and appendage at the base of its embolus on the palpalbulb which distinguishes its from other species in the genus. The female has...
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