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In sexually-mature male spiders, the final segment of the pedipalp, the tarsus, develops a complicated structure (sometimes called the palpal bulb or palpal organ) that is used to transfer sperm to the female seminal receptacles during mating. The details of this structure vary considerably between different groups of spiders and are useful for ...
Various explanations have been proposed for the evolution of the complex structure of the palpal organs found in most groups of spiders. One is the "lock-and-key" theory. The epigyne of the female spider also has a complex shape, and studies of pairs killed instantaneously during copulation show a precise fit between the male and female ...
Palpal bulb (also called bulbus, palpal organ, genital bulb): The copulatory organ of the male spider, carried on the modified last segment of the pedipalp, used to transfer sperm to the female; [20] see also Palpal bulb; Conductor: A part of the palpal bulb that accompanies and supports the embolus [6]
Just a shy spider, doing shy spider things. (Dania Maxwell / Los Angeles Times) And she maintains that spiders often get unfairly blamed for skin ailments caused by bacterial infections and blood ...
The male pedipalp has a palpal organ consisting of the tarsus (or cymbium), which is divided at the tip into two long lobes, and a simple palpal bulb similar to that of some mygalomorph spiders but apparently less complex than the bulbus of mesotheles. The abdomen is segmented, like that of a mesothele spider.
(The Center Square) - Hundreds of fire hydrants were stolen from the ground for scrap metal in advance of the blazes raging across Los Angeles, highlighting the local government’s challenges in ...
This week’s deadly wildfires in Southern California have destroyed or damaged thousands of structures, including many landmarks that hold spots in cinematic and cultural history. The Los Angeles ...
A spinneret is a silk-spinning organ of a spider or the larva of an insect. Some adult insects also have spinnerets, such as those borne on the forelegs of Embioptera. [1] Spinnerets are usually on the underside of a spider's opisthosoma, and are typically segmented. [2] [3] While most spiders have six spinnerets, some have two, four, or eight. [4]