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Highly simplified and stylized diagram of the main parts of an inflated palpal bulb, based loosely on Coddington (1990); [19] hardened parts shown darker, membranous parts shown lighter 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 ...
Spiders that spin webs typically have three claws, the middle one being small; hunting spiders typically have only two claws. Since they do not have antennae, spiders use specialised and sensitive setae on their legs to pick up scent, sounds, vibrations and air currents. [6] Some spiders, such as the Australian crab spider, do not have claws.
This image comes from the following images: File:Spider_internal_anatomy.png licensed with PD-US . 2009-06-27T01:33:45Z Kaldari 5000x2500 (10823835 Bytes) {{Information |Description={{en|1=Diagram of the internal anatomy of a two-lunged spider.}} |Source=Scanned from the 1920 edition of ''The Spider Book'', published by Doubleday, Page & Company (originally published in 1912)
The idea of coming face to face with any spider-like creature is enough to fill any arachnophobe with horror, let alone encountering one with large, spiky legs.
Paintings of Araneus angulatus from Svenska Spindlar of 1757, the first major work on spider taxonomy. Spider taxonomy is the part of taxonomy that is concerned with the science of naming, defining and classifying all spiders, members of the Araneae order of the arthropod class Arachnida, which has more than 52,700 described species.
Diagram of palpal bulb components The palpal bulb is expanded and moved during courtship and copulation. In mesothele spiders, such as Liphistius and Heptathela , there are two muscles, originating lower in the pedipalp, that attach by tendons to parts of the bulb and help to move it, the soft haematodochae allowing both movement and expansion.
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This type becomes substantially reduced in orb-web spiders, in which a collecting duct is lacking and the labyrinth apparently no longer has an excretory function." (Biology of Spiders, 1996) I would also like to point out that Biology of Spiders includes two diagrams similar to the one above. One shows the entire spider and one shows only the ...