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Internal anatomy of a female - 1 o-slit shaped orifice of poison gland. Behind the mouth opening is a mandible with a 5 segmented palpus. a-anus. s-are the two column-shaped spiracles leading into the lungs or tracheae. s'-is an unpaired spiracle that leads into tubular tracheae. The abdomen has the intestine and ovary embedded in the liver.
Some chelicerae, such as those found on nearly all spiders, are hollow and contain (or are connected to) venom glands, used to inject venom into prey or a perceived threat. Both pseudoscorpions and harvestmen have additional structures on their chelicerae that are used for grooming (papillae in pseudoscorpions, cheliceral teeth in Opiliones). [ 1 ]
Gasteracantha cancriformis [2] (spinybacked orbweaver) is a species of orb-weaver spider (family Araneidae). It is widely distributed in the New World. [1]The genus name Gasteracantha derives from the Greek words γαστήρ (gaster, "belly") and ἄκανθα (acantha, "thorn"), while the specific epithet cancriformis derives from the Latin words cancer ("crab") and forma ("shape, form ...
In most species the spiracles can be opened and closed in an efficient manner to admit air while reducing water loss. In various species, this is done by a wide range of mechanisms, such as elastic closure, and closer muscles surrounding the spiracle or kinking the tube. In some the muscle relaxes to open the spiracle, in others to close it.
“Spiders are beneficial bugs that help control other pest insects such as flies, adult mosquitoes, ants, etc.” Capture and release can look like using a cup and a piece of paper to capture and ...
A spider angioma or spider naevus (plural: spider naevi), also nevus araneus, is a type of telangiectasis [2] (swollen, spider-like blood vessels on the skin) found slightly beneath the skin's surface, often containing a central red spot and deep reddish extensions (see Blood color) which radiate outwards like a spider's web or a spider's legs.
The spider bites that experts really worry about are bites from venomous spiders, particularly black widows and brown recluse spiders. A bite from one of these types of spiders can cause severe ...
Argiope aurantia is a species of spider, commonly known as the yellow garden spider, [2] [3] black and yellow garden spider, [4] golden garden spider, [5] writing spider, zigzag spider, zipper spider, black and yellow argiope, corn spider, Steeler spider, or McKinley spider. [6] The species was first described by Hippolyte Lucas in 1833.